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uvm_swap.h revision 1.11 
      1 /*	$NetBSD: uvm_swap.h,v 1.11 2005/09/13 22:00:05 yamt 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  * 3. The name of the author may not be used to endorse or promote products
     16  *    derived from this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     23  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     24  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     25  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     26  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     28  * SUCH DAMAGE.
     29  *
     30  * from: Id: uvm_swap.h,v 1.1.2.6 1997/12/15 05:39:31 mrg Exp
     31  */
     32 
     33 #ifndef _UVM_UVM_SWAP_H_
     34 #define _UVM_UVM_SWAP_H_
     35 
     36 #define	SWSLOT_BAD	(-1)
     37 
     38 #ifdef _KERNEL
     39 #if defined(_KERNEL_OPT)
     40 #if 0 /* notyet */
     41 #include "opt_vmswap.h"
     42 #else
     43 #define	VMSWAP
     44 #endif
     45 #endif
     46 
     47 struct swapent;
     48 
     49 #if defined(VMSWAP)
     50 int	uvm_swap_get(struct vm_page *, int, int);
     51 int	uvm_swap_put(int, struct vm_page **, int, int);
     52 int	uvm_swap_alloc(int *, boolean_t);
     53 void	uvm_swap_free(int, int);
     54 void	uvm_swap_markbad(int, int);
     55 void	uvm_swap_stats(int, struct swapent *, int, register_t *);
     56 boolean_t	uvm_swapisfull(void);
     57 #else /* defined(VMSWAP) */
     58 #define	uvm_swapisfull()	TRUE
     59 #endif /* defined(VMSWAP) */
     60 
     61 #endif /* _KERNEL */
     62 
     63 #endif /* _UVM_UVM_SWAP_H_ */
     64