1 /* $OpenBSD: uvm_aobj.h,v 1.8 2002/03/14 01:27:18 millert Exp $ */
2 /* $NetBSD: uvm_aobj.h,v 1.10 2000/01/11 06:57:49 chs Exp $ */
3
4 /*
5 * Copyright (c) 1998 Chuck Silvers, Charles D. Cranor and
6 * Washington University.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by Charles D. Cranor and
20 * Washington University.
21 * 4. The name of the author may not be used to endorse or promote products
22 * derived from this software without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
27 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
28 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
29 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
30 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
33 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 *
35 * from: Id: uvm_aobj.h,v 1.1.2.4 1998/02/06 05:19:28 chs Exp
36 */
37 /*
38 * uvm_aobj.h: anonymous memory uvm_object pager
39 *
40 * author: Chuck Silvers <chuq@chuq.com>
41 * started: Jan-1998
42 *
43 * - design mostly from Chuck Cranor
44 */
45
46 #ifndef _UVM_UVM_AOBJ_H_
47 #define _UVM_UVM_AOBJ_H_
48
49 /*
50 * flags
51 */
52
53 /* flags for uao_create: can only be used one time (at bootup) */
54 #define UAO_FLAG_KERNOBJ 0x1 /* create kernel object */
55 #define UAO_FLAG_KERNSWAP 0x2 /* enable kernel swap */
56
57 /* internal flags */
58 #define UAO_FLAG_KILLME 0x4 /* aobj should die when last released
59 * page is no longer PG_BUSY ... */
60 #define UAO_FLAG_NOSWAP 0x8 /* aobj can't swap (kernel obj only!) */
61
62 #ifdef _KERNEL
63
64 /*
65 * prototypes
66 */
67
68 void uao_init(void);
69 int uao_set_swslot(struct uvm_object *, int, int);
70 void uao_dropswap(struct uvm_object *, int);
71 int uao_swap_off(int, int);
72
73 /*
74 * globals
75 */
76
77 extern struct uvm_pagerops aobj_pager;
78
79 #endif /* _KERNEL */
80
81 #endif /* _UVM_UVM_AOBJ_H_ */