1 /* $OpenBSD: uvm_param.h,v 1.12 2007/03/26 08:43:34 art Exp $ */
2 /* $NetBSD: uvm_param.h,v 1.5 2001/03/09 01:02:12 chs Exp $ */
3
4 /*
5 * Copyright (c) 1991, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * The Mach Operating System project at Carnegie-Mellon University.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * @(#)vm_param.h 8.2 (Berkeley) 1/9/95
36 *
37 *
38 * Copyright (c) 1987, 1990 Carnegie-Mellon University.
39 * All rights reserved.
40 *
41 * Authors: Avadis Tevanian, Jr., Michael Wayne Young
42 *
43 * Permission to use, copy, modify and distribute this software and
44 * its documentation is hereby granted, provided that both the copyright
45 * notice and this permission notice appear in all copies of the
46 * software, derivative works or modified versions, and any portions
47 * thereof, and that both notices appear in supporting documentation.
48 *
49 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
50 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
51 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
52 *
53 * Carnegie Mellon requests users of this software to return to
54 *
55 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
56 * School of Computer Science
57 * Carnegie Mellon University
58 * Pittsburgh PA 15213-3890
59 *
60 * any improvements or extensions that they make and grant Carnegie the
61 * rights to redistribute these changes.
62 */
63
64 /*
65 * Machine independent virtual memory parameters.
66 */
67
68 #ifndef _VM_PARAM_
69 #define _VM_PARAM_
70
71 #include <machine/vmparam.h>
72
73 /*
74 * This belongs in types.h, but breaks too many existing programs.
75 */
76 typedef int boolean_t;
77 #ifndef TRUE
78 #define TRUE 1
79 #endif
80 #ifndef FALSE
81 #define FALSE 0
82 #endif
83
84 /*
85 * The machine independent pages are referred to as PAGES. A page
86 * is some number of hardware pages, depending on the target machine.
87 */
88 #define DEFAULT_PAGE_SIZE 4096
89
90 #if defined(_KERNEL) && !defined(PAGE_SIZE)
91 /*
92 * All references to the size of a page should be done with PAGE_SIZE
93 * or PAGE_SHIFT. The fact they are variables is hidden here so that
94 * we can easily make them constant if we so desire.
95 */
96 #define PAGE_SIZE uvmexp.pagesize /* size of page */
97 #define PAGE_MASK uvmexp.pagemask /* size of page - 1 */
98 #define PAGE_SHIFT uvmexp.pageshift /* bits to shift for pages */
99 #endif /* _KERNEL */
100
101 /*
102 * CTL_VM identifiers
103 */
104 #define VM_METER 1 /* struct vmmeter */
105 #define VM_LOADAVG 2 /* struct loadavg */
106 #define VM_PSSTRINGS 3 /* PSSTRINGS */
107 #define VM_UVMEXP 4 /* struct uvmexp */
108 #define VM_SWAPENCRYPT 5 /* int */
109 #define VM_NKMEMPAGES 6 /* int - # kmem_map pages */
110 #define VM_ANONMIN 7
111 #define VM_VTEXTMIN 8
112 #define VM_VNODEMIN 9
113 #define VM_MAXSLP 10
114 #define VM_USPACE 11
115 #define VM_MAXID 12 /* number of valid vm ids */
116
117 #define CTL_VM_NAMES { \
118 { 0, 0 }, \
119 { "vmmeter", CTLTYPE_STRUCT }, \
120 { "loadavg", CTLTYPE_STRUCT }, \
121 { "psstrings", CTLTYPE_STRUCT }, \
122 { "uvmexp", CTLTYPE_STRUCT }, \
123 { "swapencrypt", CTLTYPE_NODE }, \
124 { "nkmempages", CTLTYPE_INT }, \
125 { "anonmin", CTLTYPE_INT }, \
126 { "vtextmin", CTLTYPE_INT }, \
127 { "vnodemin", CTLTYPE_INT }, \
128 { "maxslp", CTLTYPE_INT }, \
129 { "uspace", CTLTYPE_INT }, \
130 }
131
132 struct _ps_strings {
133 void *val;
134 };
135
136 #define SWAPSKIPBYTES 8192 /* never use at the start of a swap space */
137
138 #ifndef ASSEMBLER
139 /*
140 * Convert addresses to pages and vice versa.
141 * No rounding is used.
142 */
143 #ifdef _KERNEL
144 #define atop(x) ((x) >> PAGE_SHIFT)
145 #define ptoa(x) ((x) << PAGE_SHIFT)
146
147 /*
148 * Round off or truncate to the nearest page. These will work
149 * for either addresses or counts (i.e., 1 byte rounds to 1 page).
150 */
151 #define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK)
152 #define trunc_page(x) ((x) & ~PAGE_MASK)
153
154 extern psize_t mem_size; /* size of physical memory (bytes) */
155 #ifdef UBC
156 extern int ubc_nwins; /* number of UBC mapping windows */
157 extern int ubc_winsize; /* size of a UBC mapping window */
158 #endif
159
160 #else
161 /* out-of-kernel versions of round_page and trunc_page */
162 #define round_page(x) \
163 ((((vaddr_t)(x) + (vm_page_size - 1)) / vm_page_size) * \
164 vm_page_size)
165 #define trunc_page(x) \
166 ((((vaddr_t)(x)) / vm_page_size) * vm_page_size)
167
168 #endif /* _KERNEL */
169 #endif /* ASSEMBLER */
170 #endif /* _VM_PARAM_ */