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 2005 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1983, 1984, 1985, 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 _SYS_VMSYSTM_H 41 #define _SYS_VMSYSTM_H 42 43 #pragma ident "%Z%%M% %I% %E% SMI" 44 45 #include <sys/proc.h> 46 47 #ifdef __cplusplus 48 extern "C" { 49 #endif 50 51 /* 52 * Miscellaneous virtual memory subsystem variables and structures. 53 */ 54 #ifdef _KERNEL 55 extern pgcnt_t freemem; /* remaining blocks of free memory */ 56 extern pgcnt_t avefree; /* 5 sec moving average of free memory */ 57 extern pgcnt_t avefree30; /* 30 sec moving average of free memory */ 58 extern pgcnt_t deficit; /* estimate of needs of new swapped in procs */ 59 extern pgcnt_t nscan; /* number of scans in last second */ 60 extern pgcnt_t desscan; /* desired pages scanned per second */ 61 extern pgcnt_t slowscan; 62 extern pgcnt_t fastscan; 63 extern pgcnt_t pushes; /* number of pages pushed to swap device */ 64 65 /* writable copies of tunables */ 66 extern pgcnt_t maxpgio; /* max paging i/o per sec before start swaps */ 67 extern pgcnt_t lotsfree; /* max free before clock freezes */ 68 extern pgcnt_t desfree; /* minimum free pages before swapping begins */ 69 extern pgcnt_t minfree; /* no of pages to try to keep free via daemon */ 70 extern pgcnt_t needfree; /* no of pages currently being waited for */ 71 extern pgcnt_t throttlefree; /* point at which we block PG_WAIT calls */ 72 extern pgcnt_t pageout_reserve; /* point at which we deny non-PG_WAIT calls */ 73 extern pgcnt_t pages_before_pager; /* XXX */ 74 75 /* 76 * TRUE if the pageout daemon, fsflush daemon or the scheduler. These 77 * processes can't sleep while trying to free up memory since a deadlock 78 * will occur if they do sleep. 79 */ 80 #define NOMEMWAIT() (ttoproc(curthread) == proc_pageout || \ 81 ttoproc(curthread) == proc_fsflush || \ 82 ttoproc(curthread) == proc_sched) 83 84 /* insure non-zero */ 85 #define nz(x) ((x) != 0 ? (x) : 1) 86 87 /* 88 * Flags passed by the swapper to swapout routines of each 89 * scheduling class. 90 */ 91 #define HARDSWAP 1 92 #define SOFTSWAP 2 93 94 /* 95 * Values returned by valid_usr_range() 96 */ 97 #define RANGE_OKAY (0) 98 #define RANGE_BADADDR (1) 99 #define RANGE_BADPROT (2) 100 101 /* 102 * map_pgsz: temporary - subject to change. 103 */ 104 #define MAPPGSZ_VA 0x01 105 #define MAPPGSZ_STK 0x02 106 #define MAPPGSZ_HEAP 0x04 107 #define MAPPGSZ_ISM 0x08 108 109 struct as; 110 struct page; 111 struct anon; 112 113 extern int maxslp; 114 extern ulong_t pginrate; 115 extern ulong_t pgoutrate; 116 extern void swapout_lwp(klwp_t *); 117 118 extern int valid_va_range(caddr_t *basep, size_t *lenp, size_t minlen, 119 int dir); 120 extern int valid_usr_range(caddr_t, size_t, uint_t, struct as *, caddr_t); 121 extern int useracc(void *, size_t, int); 122 extern size_t map_pgsz(int maptype, struct proc *p, caddr_t addr, 123 size_t len, int *remap); 124 extern uint_t map_execseg_pgszcvec(int, caddr_t, size_t); 125 extern void map_addr(caddr_t *addrp, size_t len, offset_t off, int vacalign, 126 uint_t flags); 127 extern int map_addr_vacalign_check(caddr_t, u_offset_t); 128 extern void map_addr_proc(caddr_t *addrp, size_t len, offset_t off, 129 int vacalign, caddr_t userlimit, struct proc *p, uint_t flags); 130 extern void vmmeter(void); 131 extern int cow_mapin(struct as *, caddr_t, caddr_t, struct page **, 132 struct anon **, size_t *, int); 133 134 extern caddr_t ppmapin(struct page *, uint_t, caddr_t); 135 extern void ppmapout(caddr_t); 136 137 extern int pf_is_memory(pfn_t); 138 extern void pageout_init(void (*proc)(), proc_t *pp, pri_t pri); 139 140 extern void dcache_flushall(void); 141 142 extern void *boot_virt_alloc(void *addr, size_t size); 143 144 #endif /* _KERNEL */ 145 146 #ifdef __cplusplus 147 } 148 #endif 149 150 #endif /* _SYS_VMSYSTM_H */ 151