usr/src/sys/sys/systm.h

/*
 * Copyright (c) 1982, 1986 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 *
 *      @(#)systm.h     7.3 (Berkeley) %G%
 */

/*
 * Random set of variables
 * used by more than one
 * routine.
 */
extern  char version[];         /* system version */

/*
 * Nblkdev is the number of entries
 * (rows) in the block switch. It is
 * set in binit/bio.c by making
 * a pass over the switch.
 * Used in bounds checking on major
 * device numbers.
 */
int     nblkdev;

/*
 * Number of character switch entries.
 * Set by cinit/prim.c
 */
int     nchrdev;

int     nswdev;                 /* number of swap devices */
int     mpid;                   /* generic for unique process id's */
char    runin;                  /* scheduling flag */
char    runout;                 /* scheduling flag */
int     runrun;                 /* scheduling flag */
char    kmapwnt;                /* kernel map want flag */
char    curpri;                 /* more scheduling */

int     maxmem;                 /* actual max memory per process */
int     physmem;                /* physical memory on this CPU */

int     nswap;                  /* size of swap space */
int     updlock;                /* lock for sync */
daddr_t rablock;                /* block to be read ahead */
int     rasize;                 /* size of block in rablock */
extern  int intstack[];         /* stack for interrupts */
dev_t   rootdev;                /* device of the root */
dev_t   dumpdev;                /* device to take dumps on */
long    dumplo;                 /* offset into dumpdev */
dev_t   swapdev;                /* swapping device */
dev_t   argdev;                 /* device for argument lists */

#if defined(vax) || defined(tahoe)
extern  int icode[];            /* user init code */
extern  int szicode;            /* its size */
#endif

daddr_t bmap();
caddr_t calloc();
int     memall();
int     vmemall();
caddr_t wmemall();
swblk_t vtod();

/*
 * Structure of the system-entry table
 */
extern struct sysent
{
        int     sy_narg;                /* total number of arguments */
        int     (*sy_call)();           /* handler */
} sysent[];

int     noproc;                 /* no one is running just now */
char    *panicstr;
int     wantin;
int     boothowto;              /* reboot flags, from console subsystem */
char    *bootesym;              /* end of symbol info from boot */
int     selwait;

extern  char vmmap[];           /* poor name! */

/* casts to keep lint happy */
#define insque(q,p)     _insque((caddr_t)q,(caddr_t)p)
#define remque(q)       _remque((caddr_t)q)