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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 27 /* All Rights Reserved */ 28 29 /* 30 * University Copyright- Copyright (c) 1982, 1986, 1988 31 * The Regents of the University of California 32 * All Rights Reserved 33 * 34 * University Acknowledgment- Portions of this document are derived from 35 * software developed by the University of California, Berkeley, and its 36 * contributors. 37 */ 38 39 #ifndef _SYS_VMSYSTM_H 40 #define _SYS_VMSYSTM_H 41 42 #pragma ident "%Z%%M% %I% %E% SMI" 43 44 #include <sys/proc.h> 45 46 #ifdef __cplusplus 47 extern "C" { 48 #endif 49 50 /* 51 * Miscellaneous virtual memory subsystem variables and structures. 52 */ 53 #ifdef _KERNEL 54 extern pgcnt_t freemem; /* remaining blocks of free memory */ 55 extern pgcnt_t avefree; /* 5 sec moving average of free memory */ 56 extern pgcnt_t avefree30; /* 30 sec moving average of free memory */ 57 extern pgcnt_t deficit; /* estimate of needs of new swapped in procs */ 58 extern pgcnt_t nscan; /* number of scans in last second */ 59 extern pgcnt_t desscan; /* desired pages scanned per second */ 60 extern pgcnt_t slowscan; 61 extern pgcnt_t fastscan; 62 extern pgcnt_t pushes; /* number of pages pushed to swap device */ 63 64 /* writable copies of tunables */ 65 extern pgcnt_t maxpgio; /* max paging i/o per sec before start swaps */ 66 extern pgcnt_t lotsfree; /* max free before clock freezes */ 67 extern pgcnt_t desfree; /* minimum free pages before swapping begins */ 68 extern pgcnt_t minfree; /* no of pages to try to keep free via daemon */ 69 extern pgcnt_t needfree; /* no of pages currently being waited for */ 70 extern pgcnt_t throttlefree; /* point at which we block PG_WAIT calls */ 71 extern pgcnt_t pageout_reserve; /* point at which we deny non-PG_WAIT calls */ 72 extern pgcnt_t pages_before_pager; /* XXX */ 73 74 /* 75 * TRUE if the pageout daemon, fsflush daemon or the scheduler. These 76 * processes can't sleep while trying to free up memory since a deadlock 77 * will occur if they do sleep. 78 */ 79 #define NOMEMWAIT() (ttoproc(curthread) == proc_pageout || \ 80 ttoproc(curthread) == proc_fsflush || \ 81 ttoproc(curthread) == proc_sched) 82 83 /* insure non-zero */ 84 #define nz(x) ((x) != 0 ? (x) : 1) 85 86 /* 87 * Flags passed by the swapper to swapout routines of each 88 * scheduling class. 89 */ 90 #define HARDSWAP 1 91 #define SOFTSWAP 2 92 93 /* 94 * Values returned by valid_usr_range() 95 */ 96 #define RANGE_OKAY (0) 97 #define RANGE_BADADDR (1) 98 #define RANGE_BADPROT (2) 99 100 /* 101 * map_pgsz: temporary - subject to change. 102 */ 103 #define MAPPGSZ_VA 0x01 104 #define MAPPGSZ_STK 0x02 105 #define MAPPGSZ_HEAP 0x04 106 #define MAPPGSZ_ISM 0x08 107 108 /* 109 * Flags for map_pgszcvec 110 */ 111 #define MAPPGSZC_SHM 0x01 112 #define MAPPGSZC_PRIVM 0x02 113 #define MAPPGSZC_STACK 0x04 114 #define MAPPGSZC_HEAP 0x08 115 116 /* 117 * vacalign values for choose_addr 118 */ 119 #define ADDR_NOVACALIGN 0 120 #define ADDR_VACALIGN 1 121 122 struct as; 123 struct page; 124 struct anon; 125 126 extern int maxslp; 127 extern ulong_t pginrate; 128 extern ulong_t pgoutrate; 129 extern void swapout_lwp(klwp_t *); 130 131 extern int valid_va_range(caddr_t *basep, size_t *lenp, size_t minlen, 132 int dir); 133 extern int valid_va_range_aligned(caddr_t *basep, size_t *lenp, 134 size_t minlen, int dir, size_t align, size_t redzone, size_t off); 135 136 extern int valid_usr_range(caddr_t, size_t, uint_t, struct as *, caddr_t); 137 extern int useracc(void *, size_t, int); 138 extern size_t map_pgsz(int maptype, struct proc *p, caddr_t addr, size_t len, 139 int memcntl); 140 extern uint_t map_pgszcvec(caddr_t addr, size_t size, uintptr_t off, int flags, 141 int type, int memcntl); 142 extern int choose_addr(struct as *as, caddr_t *addrp, size_t len, offset_t off, 143 int vacalign, uint_t flags); 144 extern void map_addr(caddr_t *addrp, size_t len, offset_t off, int vacalign, 145 uint_t flags); 146 extern int map_addr_vacalign_check(caddr_t, u_offset_t); 147 extern void map_addr_proc(caddr_t *addrp, size_t len, offset_t off, 148 int vacalign, caddr_t userlimit, struct proc *p, uint_t flags); 149 extern void vmmeter(void); 150 extern int cow_mapin(struct as *, caddr_t, caddr_t, struct page **, 151 struct anon **, size_t *, int); 152 153 extern caddr_t ppmapin(struct page *, uint_t, caddr_t); 154 extern void ppmapout(caddr_t); 155 156 extern int pf_is_memory(pfn_t); 157 extern void pageout_init(void (*proc)(), proc_t *pp, pri_t pri); 158 159 extern void dcache_flushall(void); 160 161 extern void *boot_virt_alloc(void *addr, size_t size); 162 163 extern size_t exec_get_spslew(void); 164 165 #endif /* _KERNEL */ 166 167 #ifdef __cplusplus 168 } 169 #endif 170 171 #endif /* _SYS_VMSYSTM_H */ 172