1/* $NetBSD: uvm_device.h,v 1.15 2021/12/18 16:31:53 riastradh Exp $ */
2
3/*
4 * Copyright (c) 1997 Charles D. Cranor and Washington University.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 *
27 * from: Id: uvm_device.h,v 1.1.2.2 1997/10/03 17:39:44 chuck Exp
28 */
29
30#ifndef _UVM_UVM_DEVICE_H_
31#define _UVM_UVM_DEVICE_H_
32
33#include <sys/types.h>
34#include <sys/queue.h>
35
36#include <uvm/uvm_object.h>
37#include <uvm/uvm_param.h>
38#include <uvm/uvm_prot.h>
39
40/*
41 * uvm_device.h
42 *
43 * device handle into the VM system.
44 */
45
46#include <sys/types.h>
47
48#include <sys/queue.h>
49
50#include <uvm/uvm_object.h>
51
52/*
53 * the uvm_device structure. object is put at the top of the data structure.
54 * this allows:
55 * (struct uvm_device *) == (struct uvm_object *)
56 */
57
58struct uvm_device {
59 struct uvm_object u_obj; /* the actual VM object */
60 int u_flags; /* flags [LOCKED BY UDV_LOCK!] */
61 dev_t u_device; /* our device */
62 LIST_ENTRY(uvm_device) u_list; /* list of device objects */
63};
64
65/*
66 * u_flags values
67 */
68
69#define UVM_DEVICE_HOLD 0x1 /* someone has a "hold" on it */
70#define UVM_DEVICE_WANTED 0x2 /* someone wants to put a "hold" on */
71
72#ifdef _KERNEL
73
74#include <uvm/uvm_param.h>
75#include <uvm/uvm_prot.h>
76
77/*
78 * prototypes
79 */
80
81struct uvm_object *udv_attach(dev_t, vm_prot_t, voff_t, vsize_t);
82
83#endif /* _KERNEL */
84
85#endif /* _UVM_UVM_DEVICE_H_ */