1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 1998 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 /* 31 * University Copyright- Copyright (c) 1982, 1986, 1988 32 * The Regents of the University of California 33 * All Rights Reserved 34 * 35 * University Acknowledgment- Portions of this document are derived from 36 * software developed by the University of California, Berkeley, and its 37 * contributors. 38 */ 39 40 #ifndef _VM_VPAGE_H 41 #define _VM_VPAGE_H 42 43 #pragma ident "%Z%%M% %I% %E% SMI" 44 45 #ifdef __cplusplus 46 extern "C" { 47 #endif 48 49 /* 50 * VM - Information per virtual page. 51 */ 52 struct vpage { 53 uchar_t nvp_prot; /* see <sys/mman.h> prot flags */ 54 uchar_t nvp_advice; /* pplock & <sys/mman.h> madvise flags */ 55 }; 56 57 /* 58 * This was changed from a bitfield to flags/macros in order 59 * to conserve space (uchar_t bitfields are not ANSI). This could 60 * have been condensed to a uchar_t, but at the expense of complexity. 61 * We've stolen a bit from the top of nvp_advice to store pplock in. 62 * 63 * WARNING: VPP_SETADVICE(vpp, x) evaluates vpp twice, and VPP_PLOCK(vpp) 64 * returns a positive integer when the lock is held, not necessarily (1). 65 */ 66 #define VP_ADVICE_MASK (0x07) 67 #define VP_PPLOCK_MASK (0x80) /* physical page locked by me */ 68 #define VP_PPLOCK_SHIFT (0x07) /* offset of lock hiding inside nvp_advice */ 69 70 #define VPP_PROT(vpp) ((vpp)->nvp_prot) 71 #define VPP_ADVICE(vpp) ((vpp)->nvp_advice & VP_ADVICE_MASK) 72 #define VPP_ISPPLOCK(vpp) \ 73 ((uchar_t)((vpp)->nvp_advice & VP_PPLOCK_MASK)) 74 75 #define VPP_SETPROT(vpp, x) ((vpp)->nvp_prot = (x)) 76 #define VPP_SETADVICE(vpp, x) \ 77 ((vpp)->nvp_advice = ((vpp)->nvp_advice & ~VP_ADVICE_MASK) | \ 78 ((x) & VP_ADVICE_MASK)) 79 #define VPP_SETPPLOCK(vpp) ((vpp)->nvp_advice |= VP_PPLOCK_MASK) 80 #define VPP_CLRPPLOCK(vpp) ((vpp)->nvp_advice &= ~VP_PPLOCK_MASK) 81 82 #ifdef __cplusplus 83 } 84 #endif 85 86 #endif /* _VM_VPAGE_H */ 87