1 /* $NetBSD: uvm_aobj.h,v 1.21 2011/02/02 15:28:38 chuck Exp $ */ 2 3 /* 4 * Copyright (c) 1998 Chuck Silvers, Charles D. Cranor and 5 * Washington University. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * from: Id: uvm_aobj.h,v 1.1.2.4 1998/02/06 05:19:28 chs Exp 29 */ 30 /* 31 * uvm_aobj.h: anonymous memory uvm_object pager 32 * 33 * author: Chuck Silvers <chuq@chuq.com> 34 * started: Jan-1998 35 * 36 * - design mostly from Chuck Cranor 37 */ 38 39 #ifndef _UVM_UVM_AOBJ_H_ 40 #define _UVM_UVM_AOBJ_H_ 41 42 /* 43 * flags 44 */ 45 46 /* flags for uao_create: can only be used one time (at bootup) */ 47 #define UAO_FLAG_KERNOBJ 0x1 /* create kernel object */ 48 #define UAO_FLAG_KERNSWAP 0x2 /* enable kernel swap */ 49 50 /* internal flags */ 51 #define UAO_FLAG_NOSWAP 0x8 /* aobj can't swap (kernel obj only!) */ 52 53 #ifdef _KERNEL 54 #if defined(_KERNEL_OPT) 55 #include "opt_vmswap.h" 56 #endif 57 58 /* 59 * prototypes 60 */ 61 62 void uao_init(void); 63 int uao_set_swslot(struct uvm_object *, int, int); 64 #if defined(VMSWAP) 65 int uao_find_swslot(struct uvm_object *, int); 66 void uao_dropswap(struct uvm_object *, int); 67 bool uao_swap_off(int, int); 68 void uao_dropswap_range(struct uvm_object *, voff_t, voff_t); 69 #else /* defined(VMSWAP) */ 70 #define uao_find_swslot(obj, off) 0 71 #define uao_dropswap(obj, off) /* nothing */ 72 #define uao_dropswap_range(obj, lo, hi) /* nothing */ 73 #endif /* defined(VMSWAP) */ 74 75 #endif /* _KERNEL */ 76 77 #endif /* _UVM_UVM_AOBJ_H_ */ 78