1 /* $NetBSD: uvm_swap.h,v 1.26 2020/09/05 16:30:13 riastradh 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 41 struct lwp; 42 43 #if defined(VMSWAP) 44 45 struct swapent; 46 struct vm_page; 47 48 int uvm_swap_get(struct vm_page *, int, int); 49 int uvm_swap_put(int, struct vm_page **, int, int); 50 int uvm_swap_alloc(int *, bool); 51 void uvm_swap_free(int, int); 52 void uvm_swap_markbad(int, int); 53 bool uvm_swapisfull(void); 54 void swapsys_lock(krw_t); 55 void swapsys_unlock(void); 56 int uvm_swap_stats(char *, int, 57 void (*)(void *, const struct swapent *), size_t, register_t *); 58 59 #else /* defined(VMSWAP) */ 60 #define uvm_swapisfull() true 61 #define uvm_swap_stats(c, l, f, count, retval) (__used f, *retval = 0, ENOSYS) 62 #endif /* defined(VMSWAP) */ 63 64 void uvm_swap_shutdown(struct lwp *); 65 66 #endif /* _KERNEL || _MODULE */ 67 68 #endif /* _UVM_UVM_SWAP_H_ */ 69