/*      $OpenBSD: uvm_swap.h,v 1.21 2025/12/18 16:05:18 mpi Exp $       */
/*      $NetBSD: uvm_swap.h,v 1.5 2000/01/11 06:57:51 chs Exp $ */

/*
 * Copyright (c) 1997 Matthew R. Green
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * from: Id: uvm_swap.h,v 1.1.2.6 1997/12/15 05:39:31 mrg Exp
 */

#ifndef _UVM_UVM_SWAP_H_
#define _UVM_UVM_SWAP_H_

#define SWCLUSTPAGES    (MAXBSIZE >> PAGE_SHIFT)
#define SWSLOT_BAD      (-1)

#ifdef _KERNEL

int                     uvm_swap_dropcluster(struct vm_page **, int, int);
int                     uvm_swap_get(struct vm_page *, int, int);
int                     uvm_swap_put(int, struct vm_page **, int, int);
int                     uvm_swap_alloc(int *, boolean_t);
void                    uvm_swap_free(int, int);
void                    uvm_swap_markbad(int, int);
int                     uvm_swapisfilled(void);
int                     uvm_swapisfull(void);
void                    uvm_swap_freepages(struct vm_page **, int);
#ifdef HIBERNATE
int                     uvm_hibswap(dev_t, u_long *, u_long *);
#endif /* HIBERNATE */
#ifdef UVM_SWAP_ENCRYPT
void                    uvm_swap_initcrypt_all(void);
void                    uvm_swap_finicrypt_all(void);
#endif

#endif /* _KERNEL */

#endif /* _UVM_UVM_SWAP_H_ */