1/* $NetBSD: uvm_swap.h,v 1.29 2024/03/15 22:15:21 andvar 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; 42struct swapent; 43 44#if defined(VMSWAP) 45 46struct vm_page; 47 48int uvm_swap_get(struct vm_page *, int, int); 49int uvm_swap_put(int, struct vm_page **, int, int); 50int uvm_swap_alloc(int *, bool); 51void uvm_swap_free(int, int); 52void uvm_swap_markbad(int, int); 53bool uvm_swapisfull(void); 54void swapsys_lock(krw_t); 55void swapsys_unlock(void); 56int uvm_swap_stats(char *, int, 57 void (*)(void *, const struct swapent *), size_t, register_t *); 58 59#else /* defined(VMSWAP) */ 60 61#define uvm_swapisfull() true 62 63static inline int 64uvm_swap_stats(char *c, int l, void (*f)(void *, const struct swapent *), 65 size_t count, register_t *retval) 66{ 67 68 *retval = 0; 69 return ENOSYS; 70} 71 72#endif /* defined(VMSWAP) */ 73 74void uvm_swap_shutdown(struct lwp *); 75 76#endif /* _KERNEL || _MODULE */ 77 78#endif /* _UVM_UVM_SWAP_H_ */ 79