FreeBSD/Linux Kernel Cross Reference
sys/sys/conf.h

     /*      $NetBSD: conf.h,v 1.125 2006/11/04 09:30:00 elad Exp $  */
     
     /*-
      * Copyright (c) 1990, 1993
      *      The Regents of the University of California.  All rights reserved.
      * (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.
     *
     * 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. 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.
     *
     *      @(#)conf.h      8.5 (Berkeley) 1/9/95
     */
    
    #ifndef _SYS_CONF_H_
    #define _SYS_CONF_H_
    
    /*
     * Definitions of device driver entry switches
     */
    
    #include <sys/queue.h>
    
    struct buf;
    struct knote;
    struct lwp;
    struct tty;
    struct uio;
    struct vnode;
    
    /*
     * Types for d_type
     */
    #define D_OTHER 0
    #define D_TAPE  1
    #define D_DISK  2
    #define D_TTY   3
    
    /*
     * Block device switch table
     */
    struct bdevsw {
            int             (*d_open)(dev_t, int, int, struct lwp *);
            int             (*d_close)(dev_t, int, int, struct lwp *);
            void            (*d_strategy)(struct buf *);
            int             (*d_ioctl)(dev_t, u_long, caddr_t, int, struct lwp *);
            int             (*d_dump)(dev_t, daddr_t, caddr_t, size_t);
            int             (*d_psize)(dev_t);
            int             d_type;
    };
    
    /*
     * Character device switch table
     */
    struct cdevsw {
            int             (*d_open)(dev_t, int, int, struct lwp *);
            int             (*d_close)(dev_t, int, int, struct lwp *);
            int             (*d_read)(dev_t, struct uio *, int);
            int             (*d_write)(dev_t, struct uio *, int);
            int             (*d_ioctl)(dev_t, u_long, caddr_t, int, struct lwp *);
            void            (*d_stop)(struct tty *, int);
            struct tty *    (*d_tty)(dev_t);
            int             (*d_poll)(dev_t, int, struct lwp *);
            paddr_t         (*d_mmap)(dev_t, off_t, int);
            int             (*d_kqfilter)(dev_t, struct knote *);
            int             d_type;
    };
    
    #ifdef _KERNEL
    
    #define DEV_STRATEGY(bp) \
            do { \
                    const struct bdevsw *bdev = bdevsw_lookup((bp)->b_dev); \
                    if (bdev == NULL) \
                            panic("DEV_STRATEGY: block device not found"); \
                   (*bdev->d_strategy)((bp)); \
           } while (/*CONSTCOND*/0)
   
   int devsw_attach(const char *, const struct bdevsw *, int *,
                    const struct cdevsw *, int *);
   void devsw_detach(const struct bdevsw *, const struct cdevsw *);
   const struct bdevsw *bdevsw_lookup(dev_t);
   const struct cdevsw *cdevsw_lookup(dev_t);
   int bdevsw_lookup_major(const struct bdevsw *);
   int cdevsw_lookup_major(const struct cdevsw *);
   
   #define dev_type_open(n)        int n (dev_t, int, int, struct lwp *)
   #define dev_type_close(n)       int n (dev_t, int, int, struct lwp *)
   #define dev_type_read(n)        int n (dev_t, struct uio *, int)
   #define dev_type_write(n)       int n (dev_t, struct uio *, int)
   #define dev_type_ioctl(n) \
                   int n (dev_t, u_long, caddr_t, int, struct lwp *)
   #define dev_type_stop(n)        void n (struct tty *, int)
   #define dev_type_tty(n)         struct tty * n (dev_t)
   #define dev_type_poll(n)        int n (dev_t, int, struct lwp *)
   #define dev_type_mmap(n)        paddr_t n (dev_t, off_t, int)
   #define dev_type_strategy(n)    void n (struct buf *)
   #define dev_type_dump(n)        int n (dev_t, daddr_t, caddr_t, size_t)
   #define dev_type_size(n)        int n (dev_t)
   #define dev_type_kqfilter(n)    int n (dev_t, struct knote *)
   
   #define noopen          ((dev_type_open((*)))enodev)
   #define noclose         ((dev_type_close((*)))enodev)
   #define noread          ((dev_type_read((*)))enodev)
   #define nowrite         ((dev_type_write((*)))enodev)
   #define noioctl         ((dev_type_ioctl((*)))enodev)
   #define nostop          ((dev_type_stop((*)))enodev)
   #define notty           NULL
   #define nopoll          seltrue
   #define nommap          ((dev_type_mmap((*)))enodev)
   #define nodump          ((dev_type_dump((*)))enodev)
   #define nosize          NULL
   #define nokqfilter      seltrue_kqfilter
   
   #define nullopen        ((dev_type_open((*)))nullop)
   #define nullclose       ((dev_type_close((*)))nullop)
   #define nullread        ((dev_type_read((*)))nullop)
   #define nullwrite       ((dev_type_write((*)))nullop)
   #define nullioctl       ((dev_type_ioctl((*)))nullop)
   #define nullstop        ((dev_type_stop((*)))nullop)
   #define nullpoll        ((dev_type_poll((*)))nullop)
   #define nullmmap        ((dev_type_mmap((*)))nullop)
   #define nulldump        ((dev_type_dump((*)))nullop)
   #define nullkqfilter    ((dev_type_kqfilter((*)))eopnotsupp)
   
   /* symbolic sleep message strings */
   extern  const char devopn[], devio[], devwait[], devin[], devout[];
   extern  const char devioc[], devcls[];
   
   #endif /* _KERNEL */
   
   /*
    * Line discipline switch table
    */
   struct linesw {
           const char *l_name;     /* Linesw name */
   
           LIST_ENTRY(linesw) l_list;
           u_int   l_refcnt;       /* locked by ttyldisc_list_slock */
           int     l_no;           /* legacy discipline number (for TIOCGETD) */
   
           int     (*l_open)       (dev_t, struct tty *);
           int     (*l_close)      (struct tty *, int);
           int     (*l_read)       (struct tty *, struct uio *, int);
           int     (*l_write)      (struct tty *, struct uio *, int);
           int     (*l_ioctl)      (struct tty *, u_long, caddr_t, int,
                                       struct lwp *);
           int     (*l_rint)       (int, struct tty *);
           int     (*l_start)      (struct tty *);
           int     (*l_modem)      (struct tty *, int);
           int     (*l_poll)       (struct tty *, int, struct lwp *);
   };
   
   #ifdef _KERNEL
   int            ttyldisc_attach(struct linesw *);
   int            ttyldisc_detach(struct linesw *);
   struct linesw *ttyldisc_lookup(const char *);
   struct linesw *ttyldisc_lookup_bynum(int);
   struct linesw *ttyldisc_default(void);
   void           ttyldisc_release(struct linesw *);
   
   /* For those defining their own line disciplines: */
   #define ttynodisc ((int (*)(dev_t, struct tty *))enodev)
   #define ttyerrclose ((int (*)(struct tty *, int))enodev)
   #define ttyerrio ((int (*)(struct tty *, struct uio *, int))enodev)
   #define ttyerrinput ((int (*)(int, struct tty *))enodev)
   #define ttyerrstart ((int (*)(struct tty *))enodev)
   
   int     ttyerrpoll (struct tty *, int, struct lwp *);
   int     ttynullioctl(struct tty *, u_long, caddr_t, int, struct lwp *);
   
   int     iskmemdev(dev_t);
   #endif
   
   #ifdef _KERNEL
   
   #define DEV_MEM         0       /* minor device 0 is physical memory */
   #define DEV_KMEM        1       /* minor device 1 is kernel memory */
   #define DEV_NULL        2       /* minor device 2 is EOF/rathole */
   #ifdef COMPAT_16
   #define _DEV_ZERO_oARM  3       /* reserved: old ARM /dev/zero minor */
   #endif
   #define DEV_ZERO        12      /* minor device 12 is '\0'/rathole */
   
   #endif /* _KERNEL */
   
   struct devsw_conv {
           const char *d_name;
           int d_bmajor;
           int d_cmajor;
   };
   
   #ifdef _KERNEL
   const char *devsw_blk2name(int);
   int devsw_name2blk(const char *, char *, size_t);
   dev_t devsw_chr2blk(dev_t);
   dev_t devsw_blk2chr(dev_t);
   #endif /* _KERNEL */
   
   #ifdef _KERNEL
   struct  device;
   void    setroot(struct device *, int);
   void    swapconf(void);
   #endif /* _KERNEL */
   
   #endif /* !_SYS_CONF_H_ */

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