FreeBSD/Linux Kernel Cross Reference
sys/uvm/uvm_device.h
1 /* $NetBSD: uvm_device.h,v 1.10 2004/03/24 07:55:01 junyoung Exp $ */
2
3 /*
4 *
5 * Copyright (c) 1997 Charles D. Cranor and Washington University.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
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.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by Charles D. Cranor and
19 * Washington University.
20 * 4. The name of the author may not be used to endorse or promote products
21 * derived from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 *
34 * from: Id: uvm_device.h,v 1.1.2.2 1997/10/03 17:39:44 chuck Exp
35 */
36
37 #ifndef _UVM_UVM_DEVICE_H_
38 #define _UVM_UVM_DEVICE_H_
39
40 /*
41 * uvm_device.h
42 *
43 * device handle into the VM system.
44 */
45
46 /*
47 * the uvm_device structure. object is put at the top of the data structure.
48 * this allows:
49 * (struct uvm_device *) == (struct uvm_object *)
50 */
51
52 struct uvm_device {
53 struct uvm_object u_obj; /* the actual VM object */
54 int u_flags; /* flags [LOCKED BY UDV_LOCK!] */
55 dev_t u_device; /* our device */
56 LIST_ENTRY(uvm_device) u_list; /* list of device objects */
57 };
58
59 /*
60 * u_flags values
61 */
62
63 #define UVM_DEVICE_HOLD 0x1 /* someone has a "hold" on it */
64 #define UVM_DEVICE_WANTED 0x2 /* someone wants to put a "hold" on */
65
66 #ifdef _KERNEL
67
68 /*
69 * prototypes
70 */
71
72 struct uvm_object *udv_attach(void *, vm_prot_t, voff_t, vsize_t);
73
74 #endif /* _KERNEL */
75
76 #endif /* _UVM_UVM_DEVICE_H_ */
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