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