sys/dev/mm.c

   1 /*      $NetBSD: mm.c,v 1.12 2008/10/08 14:42:56 christos Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2002 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Christos Zoulas.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32
  33 #include <sys/cdefs.h>
  34 __KERNEL_RCSID(0, "$NetBSD: mm.c,v 1.12 2008/10/08 14:42:56 christos Exp $");
  35
  36 /*
  37  * Memory special file
  38  */
  39
  40 #include <sys/param.h>
  41 #include <sys/conf.h>
  42 #include <sys/buf.h>
  43 #include <sys/systm.h>
  44 #include <sys/uio.h>
  45 #include <sys/malloc.h>
  46 #include <sys/ioctl.h>
  47 #include <sys/proc.h>
  48 #include <sys/termios.h>
  49
  50 dev_type_ioctl(mmioctl);
  51
  52 int
  53 mmioctl(dev_t dev, u_long cmd, void *data, int flag,
  54     struct lwp *l)
  55 {
  56         switch (minor(dev)) {
  57         default:
  58                 switch (cmd) {
  59                 case FIONBIO:   /* We never block anyway */
  60                         return 0;
  61                 case FIOSETOWN:
  62                 case FIOGETOWN:
  63                 case TIOCGPGRP:
  64                 case TIOCSPGRP:
  65                 case TIOCGETA:
  66                         return ENOTTY;
  67                 case FIOASYNC:
  68                         if ((*(int *)data) == 0)
  69                                 return 0;
  70                         /*FALLTHROUGH*/
  71                 }
  72                 return EOPNOTSUPP;
  73         }
  74 }