usr/sys/40/param.h

/*
 * tunable variables
 */

#define NBUF    15              /* size of buffer cache */
#define NINODE  20              /* number of in core inodes */
#define NFILE   20              /* number of in core file structures */
#define NMOUNT  2               /* 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 20              /* size of core allocation area */
#define SMAPSIZ 20              /* size of swap allocation area */
#define NCALL   10              /* max simultaneous time callouts */
#define NPROC   20              /* max number of processes */
#define NTEXT   10              /* max number of pure texts */
#define NCLIST  40              /* 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)