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 /* Copyright (c) 1988 AT&T */
22 /* All Rights Reserved */
23
24 /*
25 * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
26 * Use is subject to license terms.
27 */
28
29 #ifndef _SYS_VM_MACHPARAM_H
30 #define _SYS_VM_MACHPARAM_H
31
32 #pragma ident "%Z%%M% %I% %E% SMI"
33
34 #ifdef __cplusplus
35 extern "C" {
36 #endif
37
38 /*
39 * Machine dependent constants for sun4u.
40 */
41
42 /*
43 * USRTEXT is the start of the user text/data space.
44 */
45 #define USRTEXT 0x2000
46
47 /*
48 * Virtual memory related constants for UNIX resource control, all in bytes
49 * The default stack size of 8M allows an optimization of mmu mapping
50 * resources so that in normal use a single mmu region map entry (smeg)
51 * can be used to map both the stack and shared libraries
52 */
53 #define MAXSSIZ (0x7ffff000) /* max stack size limit */
54 #define DFLSSIZ (8*1024*1024) /* initial stack size limit */
55
56 /*
57 * DSIZE_LIMIT and SSIZE_LIMIT exist to work-around an SVVS bug (1094085),
58 * and should be removed from the kernel (1094089)
59 */
60
61 #define DSIZE_LIMIT (USERLIMIT-USRTEXT) /* physical data limit */
62 #define SSIZE_LIMIT (0x7fffffff) /* physical stack limit */
63
64 /*
65 * Minimum allowable virtual address space to be used
66 * by the seg_map segment driver for fast kernel mappings.
67 */
68 #define MINMAPSIZE 0x200000
69
70 /*
71 * The virtual address space to be used by the seg_map segment
72 * driver for fast kernel mappings.
73 *
74 * Size is 1/8th of physmem at boot.
75 */
76
77 #ifdef _LP64
78 #define SEGMAPSIZE (256L * 1024L * 1024L * 1024L) /* 256G */
79 #else
80 #define SEGMAPSIZE (256 * 1024 * 1024) /* 256M */
81 #endif /* _LP64 */
82
83 /*
84 * Define the default virtual size and valid size range for the segkp segment.
85 */
86 #ifdef _LP64
87 #define SEGKPDEFSIZE (2L * 1024L * 1024L * 1024L) /* 2G */
88 #define SEGKPMAXSIZE (24L * 1024L * 1024L * 1024L) /* 24G */
89 #define SEGKPMINSIZE (512L * 1024 * 1024L) /* 512M */
90 #else
91 #define SEGKPDEFSIZE (512 * 1024 * 1024)
92 #define SEGKPMAXSIZE (512 * 1024 * 1024)
93 #define SEGKPMINSIZE (512 * 1024 * 1024)
94 #endif /* _LP64 */
95
96 /*
97 * Define minimum size for zio segment
98 */
99 #define SEGZIOMINSIZE (512L * 1024L * 1024L) /* 512M */
100 #define SEGZIOMAXSIZE (512L * 1024L * 1024L * 1024L) /* 512G */
101
102 /*
103 * The time for a process to be blocked before being very swappable.
104 * This is a number of seconds which the system takes as being a non-trivial
105 * amount of real time. You probably shouldn't change this;
106 * it is used in subtle ways (fractions and multiples of it are, that is, like
107 * half of a ``long time'', almost a long time, etc.)
108 * It is related to human patience and other factors which don't really
109 * change over time.
110 */
111 #define MAXSLP 20
112
113 /*
114 * A swapped in process is given a small amount of core without being bothered
115 * by the page replacement algorithm. Basically this says that if you are
116 * swapped in you deserve some resources. We protect the last SAFERSS
117 * pages against paging and will just swap you out rather than paging you.
118 * Note that each process has at least UPAGES pages which are not
119 * paged anyways so this number just means a swapped in process is
120 * given around 32k bytes.
121 */
122 /*
123 * nominal ``small'' resident set size
124 * protected against replacement
125 */
126 #define SAFERSS 3
127
128 /*
129 * DISKRPM is used to estimate the number of paging i/o operations
130 * which one can expect from a single disk controller.
131 *
132 * XXX - The system doesn't account for multiple swap devices.
133 */
134 #define DISKRPM 60
135
136 /*
137 * The maximum value for handspreadpages which is the the distance
138 * between the two clock hands in pages.
139 */
140 #define MAXHANDSPREADPAGES ((64 * 1024 * 1024) / PAGESIZE)
141
142 /*
143 * Paged text files that are less than PGTHRESH bytes
144 * may be "prefaulted in" instead of demand paged.
145 */
146 #define PGTHRESH (280 * 1024)
147
148 /*
149 * Cacheable bit for 64 bit MXCC Stream Source registers
150 */
151 #define BC_CACHE_SHIFT 36
152
153 /*
154 * set type for 64 bit phys addr variables. Needed at least for interface
155 * with MXCC.
156 */
157
158 #ifndef _ASM
159 typedef unsigned long long pa_t;
160 #endif
161
162 #ifdef __cplusplus
163 }
164 #endif
165
166 #endif /* _SYS_VM_MACHPARAM_H */