root / prex-0.9.0 / include / sys / param.h @ 03e9c04a
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1 | 03e9c04a | Brad Neuman | /*-
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2 | * Copyright (c) 1982, 1986, 1989, 1993
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3 | * The Regents of the University of California. All rights reserved.
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4 | * (c) UNIX System Laboratories, Inc.
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5 | * All or some portions of this file are derived from material licensed
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6 | * to the University of California by American Telephone and Telegraph
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7 | * Co. or Unix System Laboratories, Inc. and are reproduced herein with
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8 | * the permission of UNIX System Laboratories, Inc.
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9 | *
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10 | * Redistribution and use in source and binary forms, with or without
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11 | * modification, are permitted provided that the following conditions
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12 | * are met:
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13 | * 1. Redistributions of source code must retain the above copyright
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14 | * notice, this list of conditions and the following disclaimer.
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15 | * 2. Redistributions in binary form must reproduce the above copyright
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16 | * notice, this list of conditions and the following disclaimer in the
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17 | * documentation and/or other materials provided with the distribution.
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18 | * 3. Neither the name of the University nor the names of its contributors
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19 | * may be used to endorse or promote products derived from this software
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20 | * without specific prior written permission.
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21 | *
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22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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32 | * SUCH DAMAGE.
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33 | *
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34 | * @(#)param.h 8.3 (Berkeley) 4/4/95
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35 | */
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36 | |||
37 | #ifndef _SYS_PARAM_H_
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38 | #define _SYS_PARAM_H_
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39 | |||
40 | #include <conf/config.h> |
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41 | |||
42 | #ifndef LOCORE
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43 | #include <sys/types.h> |
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44 | #endif
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45 | |||
46 | /*
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47 | * Machine-independent constants (some used in following include files).
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48 | * Redefined constants are from POSIX 1003.1 limits file.
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49 | */
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50 | #include <sys/syslimits.h> |
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51 | |||
52 | #define NCARGS ARG_MAX /* max bytes for an exec function */ |
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53 | #define NGROUPS NGROUPS_MAX /* max number groups */ |
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54 | #define NOFILE OPEN_MAX /* max open files per process */ |
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55 | #define NOGROUP 65535 /* marker for empty group set member */ |
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56 | #define MAXHOSTNAMELEN 32 /* max hostname size */ |
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57 | |||
58 | #define MAXTASKS 256 /* max number of tasks in system */ |
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59 | #define MAXTHREADS 128 /* max number of threads per task */ |
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60 | #define MAXOBJECTS 32 /* max number of objects per task */ |
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61 | #define MAXSYNCS 512 /* max number of synch objects per task */ |
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62 | #define MAXMEM (4*1024*1024) /* max core per task - first # is Mb */ |
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63 | |||
64 | /* The following name length include a null-terminate character */
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65 | #define MAXTASKNAME 12 /* max task name */ |
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66 | #define MAXDEVNAME 12 /* max device name */ |
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67 | #define MAXOBJNAME 16 /* max object name */ |
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68 | #define MAXEVTNAME 12 /* max event name */ |
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69 | |||
70 | #define HZ CONFIG_HZ /* ticks per second */ |
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71 | #define MAXIRQS 32 /* max number of irq line */ |
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72 | #define PASSWORD_LEN 4 /* fixed length, not counting NULL */ |
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73 | |||
74 | /*
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75 | * Priorities.
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76 | * Probably should not be altered too much.
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77 | */
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78 | #define PRI_TIMER 15 /* priority for timer thread */ |
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79 | #define PRI_IST 16 /* top priority for interrupt threads */ |
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80 | #define PRI_DPC 33 /* priority for Deferred Procedure Call */ |
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81 | #define PRI_IDLE 255 /* priority for idle thread */ |
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82 | #define PRI_REALTIME 127 /* default priority for real-time thread */ |
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83 | #define PRI_DEFAULT 200 /* default user priority */ |
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84 | |||
85 | #define MAXPRI 0 |
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86 | #define MINPRI 255 |
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87 | #define NPRI (MINPRI + 1) /* number of thread priority */ |
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88 | |||
89 | /* Server priorities */
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90 | #define PRI_PROC 124 /* process server */ |
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91 | #define PRI_EXEC 125 /* exec server */ |
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92 | #define PRI_FS 126 /* file system server */ |
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93 | #define PRI_POW 100 /* power server */ |
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94 | |||
95 | #ifndef NULL |
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96 | #if !defined(__cplusplus)
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97 | #define NULL ((void *)0) |
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98 | #else
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99 | #define NULL 0 |
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100 | #endif
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101 | #endif
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102 | |||
103 | /* More types and definitions used throughout the kernel. */
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104 | #ifdef KERNEL
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105 | #include <sys/cdefs.h> |
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106 | #endif
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107 | |||
108 | #ifndef KERNEL
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109 | /* Signals. */
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110 | #include <sys/signal.h> |
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111 | #endif
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112 | |||
113 | #include <machine/limits.h> |
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114 | #include <machine/memory.h> |
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115 | |||
116 | #define KSTACKSZ 768 /* kernel stack size */ |
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117 | |||
118 | #define USRSTACK (0 + PAGE_SIZE) /* base address of user stack */ |
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119 | #define DFLSTKSZ 4096 /* default size of user stack */ |
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120 | |||
121 | #ifdef CONFIG_MMU
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122 | #define user_area(a) ((vaddr_t)(a) < (vaddr_t)USERLIMIT)
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123 | #else
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124 | #define user_area(a) 1 |
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125 | #endif
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126 | |||
127 | /* Address translation between physical address and kernel viritul address */
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128 | #define ptokv(pa) (void *)((paddr_t)(pa) + KERNBASE) |
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129 | #define kvtop(va) ((paddr_t)(va) - KERNBASE)
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130 | |||
131 | /*
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132 | * Round p (pointer or byte index) up to a correctly-aligned value for all
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133 | * data types (int, long, ...). The result is u_long and must be cast to
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134 | * any desired pointer type.
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135 | */
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136 | #define _ALIGNBYTES (sizeof(int) - 1) |
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137 | #define ALIGN(p) (((unsigned)(p) + _ALIGNBYTES) &~ _ALIGNBYTES) |
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138 | |||
139 | /*
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140 | * Memory page
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141 | */
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142 | #define PAGE_MASK (PAGE_SIZE-1) |
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143 | #define trunc_page(x) ((x) & ~PAGE_MASK)
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144 | #define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK)
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145 | |||
146 | /*
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147 | * MAXPATHLEN defines the longest permissable path length after expanding
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148 | * symbolic links. It is used to allocate a temporary buffer from the buffer
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149 | * pool in which to do the name expansion, hence should be a power of two,
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150 | * and must be less than or equal to MAXBSIZE. MAXSYMLINKS defines the
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151 | * maximum number of symbolic links that may be expanded in a path name.
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152 | * It should be set high enough to allow all legitimate uses, but halt
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153 | * infinite loops reasonably quickly.
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154 | */
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155 | #define MAXPATHLEN PATH_MAX
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156 | #define MAXSYMLINKS 8 |
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157 | |||
158 | /* Bit map related macros. */
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159 | #define setbit(a,i) ((a)[(i)/NBBY] |= 1<<((i)%NBBY)) |
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160 | #define clrbit(a,i) ((a)[(i)/NBBY] &= ~(1<<((i)%NBBY))) |
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161 | #define isset(a,i) ((a)[(i)/NBBY] & (1<<((i)%NBBY))) |
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162 | #define isclr(a,i) (((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0) |
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163 | |||
164 | /* Macros for counting and rounding. */
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165 | #ifndef howmany
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166 | #define howmany(x, y) (((x)+((y)-1))/(y)) |
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167 | #endif
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168 | #define roundup(x, y) ((((x)+((y)-1))/(y))*(y)) |
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169 | #define rounddown(x,y) (((x)/(y))*(y))
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170 | #define powerof2(x) ((((x)-1)&(x))==0) |
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171 | |||
172 | /* Macros for min/max. */
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173 | #define MIN(a,b) (((a)<(b))?(a):(b))
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174 | #define MAX(a,b) (((a)>(b))?(a):(b))
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175 | |||
176 | #define BSIZE 512 /* size of secondary block (bytes) */ |
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177 | |||
178 | /*
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179 | * Macro to convert milliseconds and tick.
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180 | */
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181 | #define mstohz(ms) (((ms) + 0UL) * HZ / 1000) |
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182 | |||
183 | #define hztoms(tick) ((tick) >= 0x20000 ? \ |
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184 | (((tick) + 0u) / HZ) * 1000u : \ |
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185 | (((tick) + 0u) * 1000u) / HZ) |
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186 | |||
187 | #endif /* !_SYS_PARAM_H_ */ |