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 */ 167