1 /* $NetBSD: uvm_aobj.h,v 1.23 2013/10/18 17:48:44 christos 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 for uao_create: UAO_FLAG_KERNOBJ and UAO_FLAG_KERNSWAP are 44 * used only once, to initialise UVM. 45 */ 46 #define UAO_FLAG_KERNOBJ 0x1 /* create kernel object */ 47 #define UAO_FLAG_KERNSWAP 0x2 /* enable kernel swap */ 48 #define UAO_FLAG_NOSWAP 0x8 /* aobj may not swap */ 49 50 #ifdef _KERNEL 51 #if defined(_KERNEL_OPT) 52 #include "opt_vmswap.h" 53 #endif 54 55 void uao_init(void); 56 int uao_set_swslot(struct uvm_object *, int, int); 57 58 #if defined(VMSWAP) 59 int uao_find_swslot(struct uvm_object *, int); 60 void uao_dropswap(struct uvm_object *, int); 61 bool uao_swap_off(int, int); 62 void uao_dropswap_range(struct uvm_object *, voff_t, voff_t); 63 #else 64 #define uao_find_swslot(obj, off) (__USE(off), 0) 65 #define uao_dropswap(obj, off) /* nothing */ 66 #define uao_dropswap_range(obj, lo, hi) /* nothing */ 67 #endif 68 69 #endif /* _KERNEL */ 70 71 #endif /* _UVM_UVM_AOBJ_H_ */ 72