sys/sys/kernel.h

/*
 * Copyright (c) UNIX System Laboratories, Inc.  All or some portions
 * of this file are derived from material licensed to the
 * University of California by American Telephone and Telegraph Co.
 * or UNIX System Laboratories, Inc. and are reproduced herein with
 * the permission of UNIX System Laboratories, Inc.
 */
/*-
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *      from: @(#)kernel.h      7.4 (Berkeley) 2/15/91
 *      $Id: kernel.h,v 1.8 1993/12/20 19:31:42 wollman Exp $
 */

#ifndef _SYS_KERNEL_H_
#define _SYS_KERNEL_H_ 1

/* Global variables for the kernel. */
long rmalloc();

/* 1.1 */
extern long hostid;
extern char hostname[MAXHOSTNAMELEN];
extern int hostnamelen;
extern char domainname[MAXHOSTNAMELEN];
extern int domainnamelen;

/* 1.2 */
extern struct timeval boottime;
extern struct timeval time;
extern struct timezone tz;      /* XXX */

extern int hz;                  /* clock frequency */
extern int phz;                 /* alternate clock's frequency */
extern int tick;                /* usec per clock tick */
extern int lbolt;               /* once a second sleep address */

extern fixpt_t  averunnable[3];
#if defined(COMPAT_43) && (defined(vax) || defined(tahoe))
extern double   avenrun[3];
#endif /* COMPAT_43 */

#ifdef GPROF
extern u_long s_textsize;
extern int profiling;
extern u_short *kcount;
extern char *s_lowpc;
#endif

extern const char *panicstr;    /* panic message */
extern const char version[];    /* system version */
extern const char copyright[];  /* system copyright */

extern int nblkdev;             /* number of entries in bdevsw */
extern int nchrdev;             /* number of entries in cdevsw */
extern int nswdev;              /* number of swap devices */
extern int nswap;               /* size of swap space */

extern int maxmem;              /* max memory per process */
extern int physmem;             /* physical memory */

extern dev_t dumpdev;           /* dump device */
extern long dumplo;             /* offset into dumpdev */

extern dev_t rootdev;           /* root device */
extern struct vnode *rootvp;    /* vnode equivalent to above */

extern dev_t swapdev;           /* swapping device */
extern struct vnode *swapdev_vp;/* vnode equivalent to above */

extern int boothowto;           /* reboot flags, from console subsystem */
#ifdef  KADB
extern char *bootesym;          /* end of symbol info from boot */
#endif

extern u_char curpri;           /* priority of current process */

/*
 * The following macros are used to declare global sets of objects, which
 * are collected by the linker into a `struct linker_set' as defined below.
 *
 * NB: the constants defined below must match those defined in
 * /usr/src/gnu/ld/ld.h.  Since their calculation requires arithmetic, we
 * can't name them symbolically (e.g., 23 is N_SETT | N_EXT).
 */
#define MAKE_SET(set, sym, type) \
        asm(".stabs \"_" #set "\", " #type ", 0, 0, _" #sym)
#define TEXT_SET(set, sym) MAKE_SET(set, sym, 23)
#define DATA_SET(set, sym) MAKE_SET(set, sym, 25)
#define BSS_SET(set, sym)  MAKE_SET(set, sym, 27)
#define ABS_SET(set, sym)  MAKE_SET(set, sym, 21)

struct linker_set {
        int ls_length;
        caddr_t ls_items[1];    /* really ls_length of them, trailing NULL */
};

#endif /* _SYS_KERNEL_H_ */