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 (c) 2014, Joyent, Inc. All rights reserved.
23 */
24 /*
25 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
26 * Use is subject to license terms.
27 */
28
29 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
30 /* All Rights Reserved */
31
32 /*
33 * University Copyright- Copyright (c) 1982, 1986, 1988
34 * The Regents of the University of California
35 * All Rights Reserved
36 *
37 * University Acknowledgment- Portions of this document are derived from
38 * software developed by the University of California, Berkeley, and its
39 * contributors.
40 */
41
42 #ifndef _SYS_VMSYSTM_H
43 #define _SYS_VMSYSTM_H
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 /*
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 extern caddr_t map_userlimit(proc_t *pp, struct as *as, int flags);
166
167 #endif /* _KERNEL */
168
169 #ifdef __cplusplus
170 }
171 #endif
172
173 #endif /* _SYS_VMSYSTM_H */