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Annotation of 41BSD/sys/h/systm.h, revision 1.1.1.1

1.1       root        1: /*     systm.h 4.1     11/9/80 */
                      2: 
                      3: /*
                      4:  * Random set of variables
                      5:  * used by more than one
                      6:  * routine.
                      7:  */
                      8: char   canonb[CANBSIZ];        /* buffer for erase and kill (#@) */
                      9: int    cpusid;                 /* cpu SID register */
                     10: char   version[];              /* system version */
                     11: int    lbolt;                  /* time of day in 60th not in time */
                     12: time_t time;                   /* time in sec from 1970 */
                     13: time_t bootime;                /* time at which booted */
                     14: 
                     15: int    hand;                   /* current index into coremap used by daemon */
                     16: 
                     17: /*
                     18:  * Nblkdev is the number of entries
                     19:  * (rows) in the block switch. It is
                     20:  * set in binit/bio.c by making
                     21:  * a pass over the switch.
                     22:  * Used in bounds checking on major
                     23:  * device numbers.
                     24:  */
                     25: int    nblkdev;
                     26: 
                     27: /*
                     28:  * Number of character switch entries.
                     29:  * Set by cinit/prim.c
                     30:  */
                     31: int    nchrdev;
                     32: 
                     33: int    nswdev;                 /* number of swap devices */
                     34: int    mpid;                   /* generic for unique process id's */
                     35: char   runin;                  /* scheduling flag */
                     36: char   runout;                 /* scheduling flag */
                     37: int    runrun;                 /* scheduling flag */
                     38: char   kmapwnt;                /* kernel map want flag */
                     39: char   curpri;                 /* more scheduling */
                     40: 
                     41: int    maxmem;                 /* actual max memory per process */
                     42: int    physmem;                /* physical memory on this CPU */
                     43: 
                     44: int    nswap;                  /* size of swap space */
                     45: int    updlock;                /* lock for sync */
                     46: daddr_t        rablock;                /* block to be read ahead */
                     47: char   msgbuf[MSGBUFS];        /* saved "printf" characters */
                     48: int    intstack[512];          /* stack for interrupts */
                     49: dev_t  rootdev;                /* device of the root */
                     50: dev_t  swapdev;                /* swapping device */
                     51: dev_t  argdev;
                     52: dev_t  pipedev;                /* pipe device */
                     53: 
                     54: extern int icode[];            /* user init code */
                     55: extern int szicode;            /* its size */
                     56: 
                     57: extern int printsw;            /* debug print switch */
                     58: extern int coresw;             /* switch to force action on core dumps */
                     59: 
                     60: dev_t  getmdev();
                     61: daddr_t        bmap();
                     62: unsigned max();
                     63: unsigned min();
                     64: int    memall();
                     65: int    uchar();
                     66: int    vmemall();
                     67: swblk_t        vtod();
                     68: 
                     69: /*
                     70:  * Structure of the system-entry table
                     71:  */
                     72: extern struct sysent
                     73: {
                     74:        char    sy_narg;                /* total number of arguments */
                     75:        char    sy_nrarg;               /* number of args in registers */
                     76:        int     (*sy_call)();           /* handler */
                     77: } sysent[];
                     78: 
                     79: char   vmmap[];                /* poor name! */
                     80: int    mcr[3];                 /* memory controller registers */
                     81: int    umbabeg,umbaend;        /* where sensitive vm begins/ends */
                     82: int    noproc;                 /* no one is running just now */

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