1/*	$NetBSD: uvm_aobj.h,v 1.23 2013/10/18 17:48:44 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 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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.
27 *
28 * from: Id: uvm_aobj.h,v 1.1.2.4 1998/02/06 05:19:28 chs Exp
29 */
30/*
31 * uvm_aobj.h: anonymous memory uvm_object pager
32 *
33 * author: Chuck Silvers <chuq@chuq.com>
34 * started: Jan-1998
35 *
36 * - design mostly from Chuck Cranor
37 */
38
39#ifndef _UVM_UVM_AOBJ_H_
40#define _UVM_UVM_AOBJ_H_
41
42/*
43 * Flags for uao_create: UAO_FLAG_KERNOBJ and UAO_FLAG_KERNSWAP are
44 * used only once, to initialise UVM.
45 */
46#define	UAO_FLAG_KERNOBJ	0x1	/* create kernel object */
47#define	UAO_FLAG_KERNSWAP	0x2	/* enable kernel swap */
48#define	UAO_FLAG_NOSWAP		0x8	/* aobj may not swap */
49
50#ifdef _KERNEL
51#if defined(_KERNEL_OPT)
52#include "opt_vmswap.h"
53#endif
54
55void	uao_init(void);
56int	uao_set_swslot(struct uvm_object *, int, int);
57
58#if	defined(VMSWAP)
59int	uao_find_swslot(struct uvm_object *, int);
60void	uao_dropswap(struct uvm_object *, int);
61bool	uao_swap_off(int, int);
62void	uao_dropswap_range(struct uvm_object *, voff_t, voff_t);
63#else
64#define	uao_find_swslot(obj, off)	(__USE(off), 0)
65#define	uao_dropswap(obj, off)		/* nothing */
66#define	uao_dropswap_range(obj, lo, hi)	/* nothing */
67#endif
68
69#endif /* _KERNEL */
70
71#endif /* _UVM_UVM_AOBJ_H_ */