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 2013 Nexenta Systems, Inc. All rights reserved.
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 volatile pgcnt_t slowscan;
62 extern volatile pgcnt_t fastscan;
63 extern pgcnt_t pushes; /* number of pages pushed to swap device */
64
65 /* writable copies of tunables */
66 extern volatile pgcnt_t maxpgio; /* max paging i/o per sec before */
67 /* start swaps */
68 extern volatile pgcnt_t lotsfree; /* max free before clock freezes */
69 extern volatile pgcnt_t desfree; /* minimum free pages before swapping */
70 /* begins */
71 extern volatile pgcnt_t minfree; /* no of pages to try to keep free */
72 /* via daemon */
73 extern pgcnt_t needfree; /* no of pages currently being waited for */
74 extern volatile pgcnt_t throttlefree; /* point at which we block PG_WAIT */
75 /* calls */
76 extern volatile pgcnt_t pageout_reserve; /* point at which we deny */
77 /* non-PG_WAIT calls */
78 extern volatile pgcnt_t pages_before_pager; /* XXX */
79
80 /*
81 * TRUE if the pageout daemon, fsflush daemon or the scheduler. These
82 * processes can't sleep while trying to free up memory since a deadlock
83 * will occur if they do sleep.
84 */
85 #define NOMEMWAIT() (ttoproc(curthread) == proc_pageout || \
86 ttoproc(curthread) == proc_fsflush || \
87 ttoproc(curthread) == proc_sched)
88
89 /* insure non-zero */
90 #define nz(x) ((x) != 0 ? (x) : 1)
91
92 /*
93 * Flags passed by the swapper to swapout routines of each
94 * scheduling class.
95 */
96 #define HARDSWAP 1
97 #define SOFTSWAP 2
98
99 /*
100 * Values returned by valid_usr_range()
101 */
102 #define RANGE_OKAY (0)
103 #define RANGE_BADADDR (1)
104 #define RANGE_BADPROT (2)
105
106 /*
107 * map_pgsz: temporary - subject to change.
108 */
109 #define MAPPGSZ_VA 0x01
110 #define MAPPGSZ_STK 0x02
111 #define MAPPGSZ_HEAP 0x04
112 #define MAPPGSZ_ISM 0x08
113
114 /*
115 * Flags for map_pgszcvec
116 */
117 #define MAPPGSZC_SHM 0x01
118 #define MAPPGSZC_PRIVM 0x02
119 #define MAPPGSZC_STACK 0x04
120 #define MAPPGSZC_HEAP 0x08
121
122 /*
123 * vacalign values for choose_addr
124 */
125 #define ADDR_NOVACALIGN 0
126 #define ADDR_VACALIGN 1
127
128 struct as;
129 struct page;
130 struct anon;
131
132 extern int maxslp;
133 extern ulong_t pginrate;
134 extern ulong_t pgoutrate;
135 extern void swapout_lwp(klwp_t *);
136
137 extern int valid_va_range(caddr_t *basep, size_t *lenp, size_t minlen,
138 int dir);
139 extern int valid_va_range_aligned(caddr_t *basep, size_t *lenp,
140 size_t minlen, int dir, size_t align, size_t redzone, size_t off);
141
142 extern int valid_usr_range(caddr_t, size_t, uint_t, struct as *, caddr_t);
143 extern int useracc(void *, size_t, int);
144 extern size_t map_pgsz(int maptype, struct proc *p, caddr_t addr, size_t len,
145 int memcntl);
146 extern uint_t map_pgszcvec(caddr_t addr, size_t size, uintptr_t off, int flags,
147 int type, int memcntl);
148 extern int choose_addr(struct as *as, caddr_t *addrp, size_t len, offset_t off,
149 int vacalign, uint_t flags);
150 extern void map_addr(caddr_t *addrp, size_t len, offset_t off, int vacalign,
151 uint_t flags);
152 extern int map_addr_vacalign_check(caddr_t, u_offset_t);
153 extern void map_addr_proc(caddr_t *addrp, size_t len, offset_t off,
154 int vacalign, caddr_t userlimit, struct proc *p, uint_t flags);
155 extern void vmmeter(void);
156 extern int cow_mapin(struct as *, caddr_t, caddr_t, struct page **,
157 struct anon **, size_t *, int);
158
159 extern caddr_t ppmapin(struct page *, uint_t, caddr_t);
160 extern void ppmapout(caddr_t);
161
162 extern int pf_is_memory(pfn_t);
163
164 extern void dcache_flushall(void);
165
166 extern void *boot_virt_alloc(void *addr, size_t size);
167
168 extern size_t exec_get_spslew(void);
169
170 #endif /* _KERNEL */
171
172 #ifdef __cplusplus
173 }
174 #endif
175
176 #endif /* _SYS_VMSYSTM_H */