10Sstevel@tonic-gate /* 20Sstevel@tonic-gate * CDDL HEADER START 30Sstevel@tonic-gate * 40Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*6517Srh87107 * Common Development and Distribution License (the "License"). 6*6517Srh87107 * You may not use this file except in compliance with the License. 70Sstevel@tonic-gate * 80Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 90Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 100Sstevel@tonic-gate * See the License for the specific language governing permissions 110Sstevel@tonic-gate * and limitations under the License. 120Sstevel@tonic-gate * 130Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 140Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 150Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 160Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 170Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 180Sstevel@tonic-gate * 190Sstevel@tonic-gate * CDDL HEADER END 200Sstevel@tonic-gate */ 210Sstevel@tonic-gate /* 22*6517Srh87107 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 230Sstevel@tonic-gate * Use is subject to license terms. 240Sstevel@tonic-gate */ 250Sstevel@tonic-gate 260Sstevel@tonic-gate /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 270Sstevel@tonic-gate /* All Rights Reserved */ 280Sstevel@tonic-gate 290Sstevel@tonic-gate /* 300Sstevel@tonic-gate * University Copyright- Copyright (c) 1982, 1986, 1988 310Sstevel@tonic-gate * The Regents of the University of California 320Sstevel@tonic-gate * All Rights Reserved 330Sstevel@tonic-gate * 340Sstevel@tonic-gate * University Acknowledgment- Portions of this document are derived from 350Sstevel@tonic-gate * software developed by the University of California, Berkeley, and its 360Sstevel@tonic-gate * contributors. 370Sstevel@tonic-gate */ 380Sstevel@tonic-gate 390Sstevel@tonic-gate #ifndef _VM_VPAGE_H 400Sstevel@tonic-gate #define _VM_VPAGE_H 410Sstevel@tonic-gate 420Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 430Sstevel@tonic-gate 440Sstevel@tonic-gate #ifdef __cplusplus 450Sstevel@tonic-gate extern "C" { 460Sstevel@tonic-gate #endif 470Sstevel@tonic-gate 480Sstevel@tonic-gate /* 490Sstevel@tonic-gate * VM - Information per virtual page. 500Sstevel@tonic-gate */ 510Sstevel@tonic-gate struct vpage { 520Sstevel@tonic-gate uchar_t nvp_prot; /* see <sys/mman.h> prot flags */ 530Sstevel@tonic-gate uchar_t nvp_advice; /* pplock & <sys/mman.h> madvise flags */ 540Sstevel@tonic-gate }; 550Sstevel@tonic-gate 560Sstevel@tonic-gate /* 570Sstevel@tonic-gate * This was changed from a bitfield to flags/macros in order 580Sstevel@tonic-gate * to conserve space (uchar_t bitfields are not ANSI). This could 590Sstevel@tonic-gate * have been condensed to a uchar_t, but at the expense of complexity. 60*6517Srh87107 * We've stolen two bits from the top of nvp_advice: the first to store 61*6517Srh87107 * pplock, and the second to identify pages for which we have reserved 62*6517Srh87107 * swap space, but have not necessarily allocated anon slots. 630Sstevel@tonic-gate * 640Sstevel@tonic-gate * WARNING: VPP_SETADVICE(vpp, x) evaluates vpp twice, and VPP_PLOCK(vpp) 650Sstevel@tonic-gate * returns a positive integer when the lock is held, not necessarily (1). 660Sstevel@tonic-gate */ 670Sstevel@tonic-gate #define VP_ADVICE_MASK (0x07) 680Sstevel@tonic-gate #define VP_PPLOCK_MASK (0x80) /* physical page locked by me */ 690Sstevel@tonic-gate #define VP_PPLOCK_SHIFT (0x07) /* offset of lock hiding inside nvp_advice */ 70*6517Srh87107 #define VP_SWAPRES_MASK (0x40) /* Swap space has been reserved, but we */ 71*6517Srh87107 /* might not have allocated an anon slot */ 720Sstevel@tonic-gate 730Sstevel@tonic-gate #define VPP_PROT(vpp) ((vpp)->nvp_prot) 740Sstevel@tonic-gate #define VPP_ADVICE(vpp) ((vpp)->nvp_advice & VP_ADVICE_MASK) 750Sstevel@tonic-gate #define VPP_ISPPLOCK(vpp) \ 760Sstevel@tonic-gate ((uchar_t)((vpp)->nvp_advice & VP_PPLOCK_MASK)) 77*6517Srh87107 #define VPP_ISSWAPRES(vpp) \ 78*6517Srh87107 ((uchar_t)((vpp)->nvp_advice & VP_SWAPRES_MASK)) 790Sstevel@tonic-gate 800Sstevel@tonic-gate #define VPP_SETPROT(vpp, x) ((vpp)->nvp_prot = (x)) 810Sstevel@tonic-gate #define VPP_SETADVICE(vpp, x) \ 820Sstevel@tonic-gate ((vpp)->nvp_advice = ((vpp)->nvp_advice & ~VP_ADVICE_MASK) | \ 830Sstevel@tonic-gate ((x) & VP_ADVICE_MASK)) 840Sstevel@tonic-gate #define VPP_SETPPLOCK(vpp) ((vpp)->nvp_advice |= VP_PPLOCK_MASK) 850Sstevel@tonic-gate #define VPP_CLRPPLOCK(vpp) ((vpp)->nvp_advice &= ~VP_PPLOCK_MASK) 86*6517Srh87107 #define VPP_SETSWAPRES(vpp) ((vpp)->nvp_advice |= VP_SWAPRES_MASK) 87*6517Srh87107 #define VPP_CLRSWAPRES(vpp) ((vpp)->nvp_advice &= ~VP_SWAPRES_MASK) 880Sstevel@tonic-gate 890Sstevel@tonic-gate #ifdef __cplusplus 900Sstevel@tonic-gate } 910Sstevel@tonic-gate #endif 920Sstevel@tonic-gate 930Sstevel@tonic-gate #endif /* _VM_VPAGE_H */ 94