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 extern uint64_t low_mem_scan; /* num times page scan due to low memory */ 62 extern volatile uint64_t n_throttle; /* num times page create throttled */ 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 threads 76 * can't sleep while trying to free up memory since a deadlock will occur if 77 * they do sleep. 78 */ 79 #define NOMEMWAIT() (ttoproc(curthread) == proc_pageout || \ 80 ttoproc(curthread) == proc_fsflush || \ 81 ttoproc(curthread) == proc_sched || \ 82 (curthread->t_flag & T_PUSHPAGE) != 0) 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 /* 110 * Flags for map_pgszcvec 111 */ 112 #define MAPPGSZC_SHM 0x01 113 #define MAPPGSZC_PRIVM 0x02 114 #define MAPPGSZC_STACK 0x04 115 #define MAPPGSZC_HEAP 0x08 116 117 /* 118 * vacalign values for choose_addr 119 */ 120 #define ADDR_NOVACALIGN 0 121 #define ADDR_VACALIGN 1 122 123 struct as; 124 struct page; 125 struct anon; 126 127 extern int maxslp; 128 extern ulong_t pginrate; 129 extern ulong_t pgoutrate; 130 extern void swapout_lwp(klwp_t *); 131 132 extern int valid_va_range(caddr_t *basep, size_t *lenp, size_t minlen, 133 int dir); 134 extern int valid_va_range_aligned(caddr_t *basep, size_t *lenp, 135 size_t minlen, int dir, size_t align, size_t redzone, size_t off); 136 137 extern int valid_usr_range(caddr_t, size_t, uint_t, struct as *, caddr_t); 138 extern int useracc(void *, size_t, int); 139 extern size_t map_pgsz(int maptype, struct proc *p, caddr_t addr, size_t len, 140 int memcntl); 141 extern uint_t map_pgszcvec(caddr_t addr, size_t size, uintptr_t off, int flags, 142 int type, int memcntl); 143 extern int choose_addr(struct as *as, caddr_t *addrp, size_t len, offset_t off, 144 int vacalign, uint_t flags); 145 extern void map_addr(caddr_t *addrp, size_t len, offset_t off, int vacalign, 146 uint_t flags); 147 extern int map_addr_vacalign_check(caddr_t, u_offset_t); 148 extern void map_addr_proc(caddr_t *addrp, size_t len, offset_t off, 149 int vacalign, caddr_t userlimit, struct proc *p, uint_t flags); 150 extern void vmmeter(void); 151 extern int cow_mapin(struct as *, caddr_t, caddr_t, struct page **, 152 struct anon **, size_t *, int); 153 154 extern caddr_t ppmapin(struct page *, uint_t, caddr_t); 155 extern void ppmapout(caddr_t); 156 157 extern int pf_is_memory(pfn_t); 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