1 /* $OpenBSD: uvm_aobj.h,v 1.17 2020/10/21 09:08:14 mpi Exp $ */ 2 /* $NetBSD: uvm_aobj.h,v 1.10 2000/01/11 06:57:49 chs Exp $ */ 3 4 /* 5 * Copyright (c) 1998 Chuck Silvers, Charles D. Cranor and 6 * Washington University. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 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, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 * 29 * from: Id: uvm_aobj.h,v 1.1.2.4 1998/02/06 05:19:28 chs Exp 30 */ 31 /* 32 * uvm_aobj.h: anonymous memory uvm_object pager 33 * 34 * author: Chuck Silvers <chuq@chuq.com> 35 * started: Jan-1998 36 * 37 * - design mostly from Chuck Cranor 38 */ 39 40 #ifndef _UVM_UVM_AOBJ_H_ 41 #define _UVM_UVM_AOBJ_H_ 42 43 /* 44 * flags 45 */ 46 47 /* flags for uao_create: can only be used one time (at bootup) */ 48 #define UAO_FLAG_KERNOBJ 0x1 /* create kernel object */ 49 #define UAO_FLAG_KERNSWAP 0x2 /* enable kernel swap */ 50 #define UAO_FLAG_CANFAIL 0x4 /* creation can fail */ 51 52 /* internal flags */ 53 #define UAO_FLAG_NOSWAP 0x8 /* aobj can't swap (kernel obj only!) */ 54 55 #ifdef _KERNEL 56 57 /* 58 * prototypes 59 */ 60 61 void uao_init(void); 62 int uao_set_swslot(struct uvm_object *, int, int); 63 int uao_dropswap(struct uvm_object *, int); 64 int uao_swap_off(int, int); 65 int uao_shrink(struct uvm_object *, int); 66 int uao_grow(struct uvm_object *, int); 67 68 /* 69 * globals 70 */ 71 72 extern const struct uvm_pagerops aobj_pager; 73 74 #endif /* _KERNEL */ 75 76 #endif /* _UVM_UVM_AOBJ_H_ */ 77