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- /*
- * tunable variables
- */
-
- #define NBUF 8 /* size of buffer cache */
- #define NINODE 75 /* number of in core inodes */
- #define NFILE 75 /* number of in core file structures */
- #define NMOUNT 3 /* number of mountable file systems */
- #define MAXMEM (64*32) /* max core per process - first # is Kw */
- #define MAXUPRC 15 /* max processes per user */
- #define SSIZE 20 /* initial stack size (*64 bytes) */
- #define SINCR 20 /* increment of stack (*64 bytes) */
- #define NOFILE 20 /* max open files per process */
- #define CANBSIZ 256 /* max size of typewriter line */
- #define CMAPSIZ 50 /* size of core allocation area */
- #define SMAPSIZ 50 /* size of swap allocation area */
- #define NCALL 20 /* max simultaneous time callouts */
- #define NPROC 50 /* max number of processes */
- #define NTEXT 25 /* max number of pure texts */
- #define NCLIST 100 /* max total clist size */
- #define HZ 60 /* Ticks/second of the clock */
- #define TIMEZONE (5*60) /* Minutes westward from Greenwich */
- #define DSTFLAG 1 /* Daylight Saving Time applies in this locality */
- #define MSGBUFS 128 /* Characters saved from error messages */
- #define NCARGS 5120 /* # characters in exec arglist */
-
- /*
- * priorities
- * probably should not be
- * altered too much
- */
-
- #define PSWP 0
- #define PINOD 10
- #define PRIBIO 20
- #define PZERO 25
- #define NZERO 20
- #define PPIPE 26
- #define PWAIT 30
- #define PSLEP 40
- #define PUSER 50
-
- /*
- * signals
- * dont change
- */
-
- #define NSIG 17
- /*
- * No more than 16 signals (1-16) because they are
- * stored in bits in a word.
- */
- #define SIGHUP 1 /* hangup */
- #define SIGINT 2 /* interrupt (rubout) */
- #define SIGQUIT 3 /* quit (FS) */
- #define SIGINS 4 /* illegal instruction */
- #define SIGTRC 5 /* trace or breakpoint */
- #define SIGIOT 6 /* iot */
- #define SIGEMT 7 /* emt */
- #define SIGFPT 8 /* floating exception */
- #define SIGKIL 9 /* kill, uncatchable termination */
- #define SIGBUS 10 /* bus error */
- #define SIGSEG 11 /* segmentation violation */
- #define SIGSYS 12 /* bad system call */
- #define SIGPIPE 13 /* end of pipe */
- #define SIGCLK 14 /* alarm clock */
- #define SIGTRM 15 /* Catchable termination */
-
- /*
- * fundamental constants of the implementation--
- * cannot be changed easily
- */
-
- #define NBPW sizeof(int) /* number of bytes in an integer */
- #define BSIZE 512 /* size of secondary block (bytes) */
- /* BSLOP can be 0 unless you have a TIU/Spider */
- #define BSLOP 2 /* In case some device needs bigger buffers */
- #define NINDIR (BSIZE/sizeof(daddr_t))
- #define BMASK 0777 /* BSIZE-1 */
- #define BSHIFT 9 /* LOG2(BSIZE) */
- #define NMASK 0177 /* NINDIR-1 */
- #define NSHIFT 7 /* LOG2(NINDIR) */
- #define USIZE 16 /* size of user block (*64) */
- #define UBASE 0140000 /* abs. addr of user block */
- #define NULL 0
- #define CMASK 0 /* default mask for file creation */
- #define NODEV (dev_t)(-1)
- #define ROOTINO ((ino_t)2) /* i number of all roots */
- #define SUPERB ((daddr_t)1) /* block number of the super block */
- #define DIRSIZ 14 /* max characters per directory */
- #define NICINOD 100 /* number of superblock inodes */
- #define NICFREE 50 /* number of superblock free blocks */
- #define INFSIZE 138 /* size of per-proc info for users */
- #define CBSIZE 6 /* number of chars in a clist block */
- #define CROUND 07 /* clist rounding: sizeof(int *) + CBSIZE - 1*/
-
- /*
- * Some macros for units conversion
- */
- /* Core clicks (64 bytes) to segments and vice versa */
- #define ctos(x) ((x+127)/128)
- #define stoc(x) ((x)*128)
-
- /* Core clicks (64 bytes) to disk blocks */
- #define ctod(x) ((x+7)>>3)
-
- /* inumber to disk address */
- #define itod(x) (daddr_t)((((unsigned)x+15)>>3))
-
- /* inumber to disk offset */
- #define itoo(x) (int)((x+15)&07)
-
- /* clicks to bytes */
- #define ctob(x) (x<<6)
-
- /* bytes to clicks */
- #define btoc(x) ((((unsigned)x+63)>>6))
-
- /* major part of a device */
- #define major(x) (int)(((unsigned)x>>8))
-
- /* minor part of a device */
- #define minor(x) (int)(x&0377)
-
- /* make a device number */
- #define makedev(x,y) (dev_t)((x)<<8 | (y))
-
- typedef struct { int r[1]; } * physadr;
- typedef long daddr_t;
- typedef char * caddr_t;
- typedef unsigned int ino_t;
- typedef long time_t;
- typedef int label_t[6]; /* regs 2-7 */
- typedef int dev_t;
- typedef long off_t;
-
- /*
- * Machine-dependent bits and macros
- */
- #define UMODE 0170000 /* usermode bits */
- #define USERMODE(ps) ((ps & UMODE)==UMODE)
-
- #define INTPRI 0340 /* Priority bits */
- #define BASEPRI(ps) ((ps & INTPRI) != 0)
-