1/* $NetBSD: uvm_swap.h,v 1.25 2019/05/01 07:17:18 mlelstv Exp $ */
2
3/*
4 * Copyright (c) 1997 Matthew R. Green
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,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * from: Id: uvm_swap.h,v 1.1.2.6 1997/12/15 05:39:31 mrg Exp
29 */
30
31#ifndef _UVM_UVM_SWAP_H_
32#define _UVM_UVM_SWAP_H_
33
34#define SWSLOT_BAD (-1)
35
36#if defined(_KERNEL) || defined(_MODULE)
37#if defined(_KERNEL_OPT)
38#include "opt_vmswap.h"
39#endif
40
41struct lwp;
42
43#if defined(VMSWAP)
44
45struct swapent;
46
47int uvm_swap_get(struct vm_page *, int, int);
48int uvm_swap_put(int, struct vm_page **, int, int);
49int uvm_swap_alloc(int *, bool);
50void uvm_swap_free(int, int);
51void uvm_swap_markbad(int, int);
52bool uvm_swapisfull(void);
53void swapsys_lock(krw_t);
54void swapsys_unlock(void);
55int uvm_swap_stats(char *, int,
56 void (*)(void *, const struct swapent *), size_t, register_t *);
57
58#else /* defined(VMSWAP) */
59#define uvm_swapisfull() true
60#define uvm_swap_stats(c, l, f, count, retval) (__used f, *retval = 0, ENOSYS)
61#endif /* defined(VMSWAP) */
62
63void uvm_swap_shutdown(struct lwp *);
64
65#endif /* _KERNEL || _MODULE */
66
67#endif /* _UVM_UVM_SWAP_H_ */
68