usr/src/uts/sun4/sys/vm_machparam.h

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