Commit | Line | Data |
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f86df66c | 1 | /* param.h 3.6 %G% */ |
eb401bce BJ |
2 | |
3 | /* | |
4 | * tunable variables | |
5 | * | |
6 | * NB: NBUF is well known in locore.s | |
7 | */ | |
8 | ||
9 | #define NBUF 48 /* size of buffer cache */ | |
10 | #define NINODE 250 /* number of in core inodes */ | |
11 | #define NFILE 225 /* number of in core file structures */ | |
12 | #define NMOUNT 8 /* number of mountable file systems */ | |
13 | #define MAXUPRC 25 /* max processes per user */ | |
14 | #define SSIZE 4 /* initial stack size (*512 bytes) */ | |
15 | #define SINCR 4 /* increment of stack (*512 bytes) */ | |
16 | #define NOFILE 20 /* max open files per process */ | |
17 | #define CANBSIZ 256 /* max size of typewriter line */ | |
18 | #define SMAPSIZ (4*NPROC) /* size of swap allocation area */ | |
19 | #define NCALL 40 /* max simultaneous time callouts */ | |
20 | #define NPROC 150 /* max number of processes */ | |
21 | #define NTEXT 60 /* max number of pure texts */ | |
22 | #define NCLIST 500 /* max total clist size */ | |
23 | #define HZ 60 /* Ticks/second of the clock */ | |
24 | #define TIMEZONE (8*60) /* Minutes westward from Greenwich */ | |
25 | #define DSTFLAG 1 /* Daylight Saving Time applies in this locality */ | |
26 | #define MSGBUFS 128 /* Characters saved from error messages */ | |
27 | #define NCARGS 5120 /* # characters in exec arglist */ | |
28 | /* | |
29 | * priorities | |
30 | * probably should not be | |
31 | * altered too much | |
32 | */ | |
33 | ||
34 | #define PSWP 0 | |
35 | #define PINOD 10 | |
36 | #define PRIBIO 20 | |
37 | #define PRIUBA 24 | |
38 | #define PZERO 25 | |
39 | #define PPIPE 26 | |
40 | #define PWAIT 30 | |
41 | #define PSLEP 40 | |
42 | #define PUSER 50 | |
43 | ||
44 | #define NZERO 20 | |
45 | ||
46 | /* | |
47 | * signals | |
48 | * dont change | |
49 | */ | |
50 | ||
92808ee4 BJ |
51 | #ifndef NSIG |
52 | #include <signal.h> | |
53 | #endif | |
31037142 BJ |
54 | |
55 | /* | |
56 | * Return values from tsleep(). | |
57 | */ | |
58 | #define TS_OK 0 /* normal wakeup */ | |
59 | #define TS_TIME 1 /* timed-out wakeup */ | |
60 | #define TS_SIG 2 /* asynchronous signal wakeup */ | |
eb401bce BJ |
61 | |
62 | /* | |
63 | * fundamental constants of the implementation-- | |
64 | * cannot be changed easily. | |
65 | * note: UPAGES is well known in locore.s | |
66 | */ | |
67 | ||
68 | #define NBPW sizeof(int) /* number of bytes in an integer */ | |
69 | ||
70 | #define UPAGES 6 /* pages of u-area */ | |
71 | #define NULL 0 | |
72 | #define CMASK 0 /* default mask for file creation */ | |
73 | #define NODEV (dev_t)(-1) | |
74 | #define ROOTINO ((ino_t)2) /* i number of all roots */ | |
75 | #define SUPERB ((daddr_t)1) /* block number of the super block */ | |
76 | #define DIRSIZ 14 /* max characters per directory */ | |
77 | ||
78 | /* | |
79 | * Clustering of hardware pages on machines with ridiculously small | |
80 | * page sizes is done here. The paging subsystem deals with units of | |
81 | * CLSIZE pte's describing NBPG (from vm.h) pages each... BSIZE must | |
82 | * be CLSIZE*NBPG in the current implementation, that is the paging subsystem | |
83 | * deals with the same size blocks that the file system uses. | |
84 | * | |
85 | * NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE | |
86 | * | |
87 | * NB: CLSIZE is well known in locore.s. | |
88 | */ | |
89 | #define CLSIZE 2 | |
90 | ||
91 | /* give the base virtual address (first of CLSIZE) */ | |
92 | #define clbase(i) ((i) &~ (CLSIZE-1)) | |
93 | ||
94 | /* round a number of clicks up to a whole cluster */ | |
95 | #define clrnd(i) (((i) + (CLSIZE-1)) &~ (CLSIZE-1)) | |
96 | ||
97 | #if CLSIZE==1 | |
98 | #define BSIZE 512 /* size of secondary block (bytes) */ | |
99 | #define INOPB 8 /* 8 inodes per block */ | |
100 | #define BMASK 0777 /* BSIZE-1 */ | |
101 | #define BSHIFT 9 /* LOG2(BSIZE) */ | |
102 | #define NMASK 0177 /* NINDIR-1 */ | |
103 | #define NSHIFT 7 /* LOG2(NINDIR) */ | |
104 | #define NICINOD 100 /* number of superblock inodes */ | |
105 | #define NICFREE 50 /* number of superblock free blocks */ | |
106 | ||
107 | #endif | |
108 | ||
109 | #if CLSIZE==2 | |
110 | #define BSIZE 1024 | |
111 | #define INOPB 16 | |
112 | #define BMASK 01777 | |
113 | #define BSHIFT 10 | |
114 | #define NMASK 0377 | |
115 | #define NSHIFT 8 | |
116 | #define NICINOD 100 | |
117 | #define NICFREE 178 | |
118 | #endif | |
119 | ||
120 | #if CLSIZE==4 | |
121 | #define BSIZE 2048 | |
122 | #define INOPB 32 | |
123 | #define BMASK 03777 | |
124 | #define BSHIFT 11 | |
125 | #define NMASK 0777 | |
126 | #define NSHIFT 9 | |
127 | #define NICINOD 100 | |
128 | #define NICFREE 434 | |
129 | #endif | |
130 | ||
131 | #ifndef INTRLVE | |
132 | /* macros replacing interleaving functions */ | |
133 | #define dkblock(bp) ((bp)->b_blkno) | |
134 | #define dkunit(bp) (minor((bp)->b_dev) >> 3) | |
135 | #endif | |
136 | ||
137 | /* inumber to disk address and inumber to disk offset */ | |
138 | #define itod(x) ((daddr_t)((((unsigned)(x)+2*INOPB-1)/INOPB))) | |
139 | #define itoo(x) ((int)(((x)+2*INOPB-1)%INOPB)) | |
140 | ||
141 | /* file system blocks to disk blocks and back */ | |
142 | #define fsbtodb(b) ((b)*CLSIZE) | |
143 | #define dbtofsb(b) ((b)/CLSIZE) | |
144 | ||
eb401bce BJ |
145 | #define NINDIR (BSIZE/sizeof(daddr_t)) |
146 | ||
147 | #define CBSIZE 28 /* number of chars in a clist block */ | |
148 | #define CROUND 0x1F /* clist rounding; sizeof(int *) + CBSIZE -1*/ | |
149 | #define CLKTICK (1000000/(HZ)) /* microseconds in a clock tick */ | |
150 | ||
151 | /* | |
152 | * Macros for fast min/max | |
153 | */ | |
154 | #define MIN(a,b) (((a)<(b))?(a):(b)) | |
155 | #define MAX(a,b) (((a)>(b))?(a):(b)) | |
156 | ||
157 | /* | |
158 | * Some macros for units conversion | |
159 | */ | |
160 | /* Core clicks (512 bytes) to segments and vice versa */ | |
161 | #define ctos(x) (x) | |
162 | #define stoc(x) (x) | |
163 | ||
164 | /* Core clicks (512 bytes) to disk blocks */ | |
165 | #define ctod(x) (x) | |
166 | ||
167 | /* clicks to bytes */ | |
168 | #define ctob(x) ((x)<<9) | |
169 | ||
170 | /* bytes to clicks */ | |
171 | #define btoc(x) ((((unsigned)(x)+511)>>9)) | |
172 | ||
173 | /* major part of a device */ | |
174 | #define major(x) ((int)(((unsigned)(x)>>8)&0377)) | |
175 | ||
176 | /* minor part of a device */ | |
177 | #define minor(x) ((int)((x)&0377)) | |
178 | ||
179 | /* make a device number */ | |
180 | #define makedev(x,y) ((dev_t)(((x)<<8) | (y))) | |
181 | ||
182 | typedef struct { int r[1]; } * physadr; | |
183 | typedef int daddr_t; | |
184 | typedef char * caddr_t; | |
185 | typedef unsigned short ino_t; | |
186 | typedef int swblk_t; | |
187 | typedef int size_t; | |
188 | typedef int time_t; | |
189 | typedef int label_t[14]; | |
190 | typedef short dev_t; | |
191 | typedef int off_t; | |
192 | ||
193 | /* | |
194 | * Machine-dependent bits and macros | |
195 | */ | |
196 | #define UMODE PSL_CURMOD /* usermode bits */ | |
197 | #define USERMODE(ps) (((ps) & UMODE) == UMODE) | |
198 | ||
199 | #define BASEPRI(ps) (((ps) & PSL_IPL) != 0) |