FreeBSD/Linux Kernel Cross Reference
sys/uvm/uvm_aobj.h
1 /* $NetBSD: uvm_aobj.h,v 1.18 2005/12/11 12:25:29 christos Exp $ */
2
3 /*
4 * Copyright (c) 1998 Chuck Silvers, Charles D. Cranor and
5 * 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_aobj.h,v 1.1.2.4 1998/02/06 05:19:28 chs Exp
35 */
36 /*
37 * uvm_aobj.h: anonymous memory uvm_object pager
38 *
39 * author: Chuck Silvers <chuq@chuq.com>
40 * started: Jan-1998
41 *
42 * - design mostly from Chuck Cranor
43 */
44
45 #ifndef _UVM_UVM_AOBJ_H_
46 #define _UVM_UVM_AOBJ_H_
47
48 /*
49 * flags
50 */
51
52 /* flags for uao_create: can only be used one time (at bootup) */
53 #define UAO_FLAG_KERNOBJ 0x1 /* create kernel object */
54 #define UAO_FLAG_KERNSWAP 0x2 /* enable kernel swap */
55
56 /* internal flags */
57 #define UAO_FLAG_NOSWAP 0x8 /* aobj can't swap (kernel obj only!) */
58
59 #ifdef _KERNEL
60 #if defined(_KERNEL_OPT)
61 #include "opt_vmswap.h"
62 #endif
63
64 /*
65 * prototypes
66 */
67
68 void uao_init(void);
69 int uao_set_swslot(struct uvm_object *, int, int);
70 #if defined(VMSWAP)
71 int uao_find_swslot(struct uvm_object *, int);
72 void uao_dropswap(struct uvm_object *, int);
73 int uao_swap_off(int, int);
74 void uao_dropswap_range(struct uvm_object *, voff_t, voff_t);
75 #else /* defined(VMSWAP) */
76 #define uao_find_swslot(obj, off) 0
77 #define uao_dropswap(obj, off) /* nothing */
78 #define uao_dropswap_range(obj, lo, hi) /* nothing */
79 #endif /* defined(VMSWAP) */
80
81 /*
82 * globals
83 */
84
85 extern struct uvm_pagerops aobj_pager;
86
87 #endif /* _KERNEL */
88
89 #endif /* _UVM_UVM_AOBJ_H_ */
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