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 2009 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 #include <sys/proc.h> 43 44 #ifdef __cplusplus 45 extern "C" { 46 #endif 47 48 /* 49 * Miscellaneous virtual memory subsystem variables and structures. 50 */ 51 #ifdef _KERNEL 52 extern pgcnt_t freemem; /* remaining blocks of free memory */ 53 extern pgcnt_t avefree; /* 5 sec moving average of free memory */ 54 extern pgcnt_t avefree30; /* 30 sec moving average of free memory */ 55 extern pgcnt_t deficit; /* estimate of needs of new swapped in procs */ 56 extern pgcnt_t nscan; /* number of scans in last second */ 57 extern pgcnt_t desscan; /* desired pages scanned per second */ 58 extern pgcnt_t slowscan; 59 extern pgcnt_t fastscan; 60 extern pgcnt_t pushes; /* number of pages pushed to swap device */ 61 62 /* writable copies of tunables */ 63 extern pgcnt_t maxpgio; /* max paging i/o per sec before start swaps */ 64 extern pgcnt_t lotsfree; /* max free before clock freezes */ 65 extern pgcnt_t desfree; /* minimum free pages before swapping begins */ 66 extern pgcnt_t minfree; /* no of pages to try to keep free via daemon */ 67 extern pgcnt_t needfree; /* no of pages currently being waited for */ 68 extern pgcnt_t throttlefree; /* point at which we block PG_WAIT calls */ 69 extern pgcnt_t pageout_reserve; /* point at which we deny non-PG_WAIT calls */ 70 extern pgcnt_t pages_before_pager; /* XXX */ 71 72 /* 73 * TRUE if the pageout daemon, fsflush daemon, or the scheduler. These threads 74 * can't sleep while trying to free up memory since a deadlock will occur if 75 * they do sleep. 76 */ 77 #define NOMEMWAIT() (ttoproc(curthread) == proc_pageout || \ 78 ttoproc(curthread) == proc_fsflush || \ 79 ttoproc(curthread) == proc_sched || \ 80 (curthread->t_flag & T_PUSHPAGE) != 0) 81 82 /* insure non-zero */ 83 #define nz(x) ((x) != 0 ? (x) : 1) 84 85 /* 86 * Flags passed by the swapper to swapout routines of each 87 * scheduling class. 88 */ 89 #define HARDSWAP 1 90 #define SOFTSWAP 2 91 92 /* 93 * Values returned by valid_usr_range() 94 */ 95 #define RANGE_OKAY (0) 96 #define RANGE_BADADDR (1) 97 #define RANGE_BADPROT (2) 98 99 /* 100 * map_pgsz: temporary - subject to change. 101 */ 102 #define MAPPGSZ_VA 0x01 103 #define MAPPGSZ_STK 0x02 104 #define MAPPGSZ_HEAP 0x04 105 #define MAPPGSZ_ISM 0x08 106 107 /* 108 * Flags for map_pgszcvec 109 */ 110 #define MAPPGSZC_SHM 0x01 111 #define MAPPGSZC_PRIVM 0x02 112 #define MAPPGSZC_STACK 0x04 113 #define MAPPGSZC_HEAP 0x08 114 115 /* 116 * vacalign values for choose_addr 117 */ 118 #define ADDR_NOVACALIGN 0 119 #define ADDR_VACALIGN 1 120 121 struct as; 122 struct page; 123 struct anon; 124 125 extern int maxslp; 126 extern ulong_t pginrate; 127 extern ulong_t pgoutrate; 128 extern void swapout_lwp(klwp_t *); 129 130 extern int valid_va_range(caddr_t *basep, size_t *lenp, size_t minlen, 131 int dir); 132 extern int valid_va_range_aligned(caddr_t *basep, size_t *lenp, 133 size_t minlen, int dir, size_t align, size_t redzone, size_t off); 134 135 extern int valid_usr_range(caddr_t, size_t, uint_t, struct as *, caddr_t); 136 extern int useracc(void *, size_t, int); 137 extern size_t map_pgsz(int maptype, struct proc *p, caddr_t addr, size_t len, 138 int memcntl); 139 extern uint_t map_pgszcvec(caddr_t addr, size_t size, uintptr_t off, int flags, 140 int type, int memcntl); 141 extern int choose_addr(struct as *as, caddr_t *addrp, size_t len, offset_t off, 142 int vacalign, uint_t flags); 143 extern void map_addr(caddr_t *addrp, size_t len, offset_t off, int vacalign, 144 uint_t flags); 145 extern int map_addr_vacalign_check(caddr_t, u_offset_t); 146 extern void map_addr_proc(caddr_t *addrp, size_t len, offset_t off, 147 int vacalign, caddr_t userlimit, struct proc *p, uint_t flags); 148 extern void vmmeter(void); 149 extern int cow_mapin(struct as *, caddr_t, caddr_t, struct page **, 150 struct anon **, size_t *, int); 151 152 extern caddr_t ppmapin(struct page *, uint_t, caddr_t); 153 extern void ppmapout(caddr_t); 154 155 extern int pf_is_memory(pfn_t); 156 157 extern void dcache_flushall(void); 158 159 extern void *boot_virt_alloc(void *addr, size_t size); 160 161 extern size_t exec_get_spslew(void); 162 163 #endif /* _KERNEL */ 164 165 #ifdef __cplusplus 166 } 167 #endif 168 169 #endif /* _SYS_VMSYSTM_H */ 170