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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* Copyright (c) 1988 AT&T */ 23 /* All Rights Reserved */ 24 25 26 /* 27 * Copyright (c) 1989,1999 by Sun Microsystems, Inc. 28 * All rights reserved. 29 */ 30 31 #ifndef _SYS_VM_MACHPARAM_H 32 #define _SYS_VM_MACHPARAM_H 33 34 #pragma ident "%Z%%M% %I% %E% SMI" 35 36 #ifdef __cplusplus 37 extern "C" { 38 #endif 39 40 /* 41 * Machine dependent constants for sun4u. 42 */ 43 44 /* 45 * USRTEXT is the start of the user text/data space. 46 */ 47 #define USRTEXT 0x2000 48 49 /* 50 * Virtual memory related constants for UNIX resource control, all in bytes 51 * The default stack size of 8M allows an optimization of mmu mapping 52 * resources so that in normal use a single mmu region map entry (smeg) 53 * can be used to map both the stack and shared libraries 54 */ 55 #define MAXSSIZ (0x7ffff000) /* max stack size limit */ 56 #define DFLSSIZ (8*1024*1024) /* initial stack size limit */ 57 58 /* 59 * DSIZE_LIMIT and SSIZE_LIMIT exist to work-around an SVVS bug (1094085), 60 * and should be removed from the kernel (1094089) 61 */ 62 63 #define DSIZE_LIMIT (USERLIMIT-USRTEXT) /* physical data limit */ 64 #define SSIZE_LIMIT (0x7fffffff) /* physical stack limit */ 65 66 /* 67 * Minimum allowable virtual address space to be used 68 * by the seg_map segment driver for fast kernel mappings. 69 */ 70 #define MINMAPSIZE 0x200000 71 72 /* 73 * The virtual address space to be used by the seg_map segment 74 * driver for fast kernel mappings. 75 * 76 * Size is 1/8th of physmem at boot. 77 */ 78 79 #ifdef _LP64 80 #define SEGMAPSIZE (256L * 1024L * 1024L * 1024L) /* 256G */ 81 #else 82 #define SEGMAPSIZE (256 * 1024 * 1024) /* 256M */ 83 #endif /* _LP64 */ 84 85 /* 86 * Define the default virtual size and valid size range for the segkp segment. 87 */ 88 #ifdef _LP64 89 #define SEGKPDEFSIZE (2L * 1024L * 1024L * 1024L) /* 2G */ 90 #define SEGKPMAXSIZE (24L * 1024L * 1024L * 1024L) /* 24G */ 91 #define SEGKPMINSIZE (512L * 1024 * 1024L) /* 512M */ 92 #else 93 #define SEGKPDEFSIZE (512 * 1024 * 1024) 94 #define SEGKPMAXSIZE (512 * 1024 * 1024) 95 #define SEGKPMINSIZE (512 * 1024 * 1024) 96 #endif /* _LP64 */ 97 98 /* 99 * The time for a process to be blocked before being very swappable. 100 * This is a number of seconds which the system takes as being a non-trivial 101 * amount of real time. You probably shouldn't change this; 102 * it is used in subtle ways (fractions and multiples of it are, that is, like 103 * half of a ``long time'', almost a long time, etc.) 104 * It is related to human patience and other factors which don't really 105 * change over time. 106 */ 107 #define MAXSLP 20 108 109 /* 110 * A swapped in process is given a small amount of core without being bothered 111 * by the page replacement algorithm. Basically this says that if you are 112 * swapped in you deserve some resources. We protect the last SAFERSS 113 * pages against paging and will just swap you out rather than paging you. 114 * Note that each process has at least UPAGES pages which are not 115 * paged anyways so this number just means a swapped in process is 116 * given around 32k bytes. 117 */ 118 /* 119 * nominal ``small'' resident set size 120 * protected against replacement 121 */ 122 #define SAFERSS 3 123 124 /* 125 * DISKRPM is used to estimate the number of paging i/o operations 126 * which one can expect from a single disk controller. 127 * 128 * XXX - The system doesn't account for multiple swap devices. 129 */ 130 #define DISKRPM 60 131 132 /* 133 * The maximum value for handspreadpages which is the the distance 134 * between the two clock hands in pages. 135 */ 136 #define MAXHANDSPREADPAGES ((64 * 1024 * 1024) / PAGESIZE) 137 138 /* 139 * Paged text files that are less than PGTHRESH bytes 140 * may be "prefaulted in" instead of demand paged. 141 */ 142 #define PGTHRESH (280 * 1024) 143 144 /* 145 * Cacheable bit for 64 bit MXCC Stream Source registers 146 */ 147 #define BC_CACHE_SHIFT 36 148 149 /* 150 * set type for 64 bit phys addr variables. Needed at least for interface 151 * with MXCC. 152 */ 153 154 #ifndef _ASM 155 typedef unsigned long long pa_t; 156 #endif 157 158 #ifdef __cplusplus 159 } 160 #endif 161 162 #endif /* _SYS_VM_MACHPARAM_H */ 163