LCOM1920-T02G10

/*        $NetBSD: uvm_swap.h,v 1.22 2015/07/30 10:25:49 christos 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        SWSLOT_BAD        (-1)

#if defined(_KERNEL) || defined(_MODULE)

#if defined(_KERNEL_OPT)

#include "opt_vmswap.h"

#endif

struct swapent;

struct lwp;

#if defined(VMSWAP)

int        uvm_swap_get(struct vm_page *, int, int);

int        uvm_swap_put(int, struct vm_page **, int, int);

int        uvm_swap_alloc(int *, bool);

void        uvm_swap_free(int, int);

void        uvm_swap_markbad(int, int);

bool        uvm_swapisfull(void);

void        swapsys_lock(krw_t);

void        swapsys_unlock(void);

void        uvm_swap_stats(int, struct swapent *, int, register_t *);

#else /* defined(VMSWAP) */

#define        uvm_swapisfull()        true

#define uvm_swap_stats(c, sep, count, retval) { *retval = 0; }

#endif /* defined(VMSWAP) */

void        uvm_swap_shutdown(struct lwp *);

#endif /* _KERNEL || _MODULE */

#endif /* _UVM_UVM_SWAP_H_ */