/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License, Version 1.0 only * (the "License"). You may not use this file except in compliance * with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 1998 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ /* All Rights Reserved */ /* * University Copyright- Copyright (c) 1982, 1986, 1988 * The Regents of the University of California * All Rights Reserved * * University Acknowledgment- Portions of this document are derived from * software developed by the University of California, Berkeley, and its * contributors. */ #ifndef _VM_VPAGE_H #define _VM_VPAGE_H #pragma ident "%Z%%M% %I% %E% SMI" #ifdef __cplusplus extern "C" { #endif /* * VM - Information per virtual page. */ struct vpage { uchar_t nvp_prot; /* see <sys/mman.h> prot flags */ uchar_t nvp_advice; /* pplock & <sys/mman.h> madvise flags */ }; /* * This was changed from a bitfield to flags/macros in order * to conserve space (uchar_t bitfields are not ANSI). This could * have been condensed to a uchar_t, but at the expense of complexity. * We've stolen a bit from the top of nvp_advice to store pplock in. * * WARNING: VPP_SETADVICE(vpp, x) evaluates vpp twice, and VPP_PLOCK(vpp) * returns a positive integer when the lock is held, not necessarily (1). */ #define VP_ADVICE_MASK (0x07) #define VP_PPLOCK_MASK (0x80) /* physical page locked by me */ #define VP_PPLOCK_SHIFT (0x07) /* offset of lock hiding inside nvp_advice */ #define VPP_PROT(vpp) ((vpp)->nvp_prot) #define VPP_ADVICE(vpp) ((vpp)->nvp_advice & VP_ADVICE_MASK) #define VPP_ISPPLOCK(vpp) \ ((uchar_t)((vpp)->nvp_advice & VP_PPLOCK_MASK)) #define VPP_SETPROT(vpp, x) ((vpp)->nvp_prot = (x)) #define VPP_SETADVICE(vpp, x) \ ((vpp)->nvp_advice = ((vpp)->nvp_advice & ~VP_ADVICE_MASK) | \ ((x) & VP_ADVICE_MASK)) #define VPP_SETPPLOCK(vpp) ((vpp)->nvp_advice |= VP_PPLOCK_MASK) #define VPP_CLRPPLOCK(vpp) ((vpp)->nvp_advice &= ~VP_PPLOCK_MASK) #ifdef __cplusplus } #endif #endif /* _VM_VPAGE_H */