bsd/dev/i386/conf.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * Copyright (c) 1997 by Apple Computer, Inc., all rights reserved
  27  * Copyright (c) 1993 NeXT Computer, Inc.
  28  *
  29  * UNIX Device switch tables.
  30  *
  31  * HISTORY
  32  *
  33  * 30 July 1997 Umesh Vaishampayan (umeshv@apple.com)
  34  *      enabled file descriptor pseudo-device.
  35  * 18 June 1993 ? at NeXT
  36  *      Cleaned up a lot of stuff in this file.
  37  */
  38
  39 #include <sys/param.h>
  40 #include <sys/systm.h>
  41 #include <sys/buf.h>
  42 #include <sys/ioctl.h>
  43 #include <sys/tty.h>
  44 #include <sys/conf.h>
  45
  46
  47 extern int      nulldev();
  48
  49 struct bdevsw   bdevsw[] =
  50 {
  51         /*
  52          *      For block devices, every other block of 8 slots is
  53          *      reserved to NeXT.  The other slots are available for
  54          *      the user.  This way we can both add new entries without
  55          *      running into each other.  Be sure to fill in NeXT's
  56          *      8 reserved slots when you jump over us -- we'll do the
  57          *      same for you.
  58          */
  59
  60         /* 0 - 7 are reserved to NeXT */
  61
  62         NO_BDEVICE,                                                     /* 0*/
  63         NO_BDEVICE,                                                     /* 1*/
  64         NO_BDEVICE,                                                     /* 2*/
  65         NO_BDEVICE,                                                     /* 3*/
  66         NO_BDEVICE,                                                     /* 4*/
  67         NO_BDEVICE,                                                     /* 5*/
  68         NO_BDEVICE,                                                     /* 6*/
  69         NO_BDEVICE,                                                     /* 7*/
  70
  71         /* 8 - 15 are reserved to the user */
  72         NO_BDEVICE,                                                     /* 8*/
  73         NO_BDEVICE,                                                     /* 9*/
  74         NO_BDEVICE,                                                     /*10*/
  75         NO_BDEVICE,                                                     /*11*/
  76         NO_BDEVICE,                                                     /*12*/
  77         NO_BDEVICE,                                                     /*13*/
  78         NO_BDEVICE,                                                     /*14*/
  79         NO_BDEVICE,                                                     /*15*/
  80
  81         /* 16 - 23 are reserved to NeXT */
  82         NO_BDEVICE,                                                     /*16*/
  83         NO_BDEVICE,                                                     /*17*/
  84         NO_BDEVICE,                                                     /*18*/
  85         NO_BDEVICE,                                                     /*18*/
  86         NO_BDEVICE,                                                     /*20*/
  87         NO_BDEVICE,                                                     /*21*/
  88         NO_BDEVICE,                                                     /*22*/
  89         NO_BDEVICE,                                                     /*23*/
  90 };
  91
  92 int     nblkdev = sizeof (bdevsw) / sizeof (bdevsw[0]);
  93
  94 extern struct tty *km_tty[];
  95 extern int      cnopen(),cnclose(),cnread(),cnwrite(),cnioctl(),
  96                 cnselect(),cngetc(), cnputc(dev_t dev, char c);
  97 extern int      kmopen(),kmclose(),kmread(),kmwrite(),kmioctl(),
  98                 kmgetc(), kmputc(dev_t dev, char c);
  99 extern int      sgopen(),sgclose(), sgioctl();
 100
 101 #if NVOL > 0
 102 extern int      volopen(),volclose(),volioctl();
 103 #else
 104 #define volopen         eno_opcl
 105 #define volclose        eno_opcl
 106 #define volioctl        eno_ioctl
 107 #endif
 108
 109 extern int      cttyopen(), cttyread(), cttywrite(), cttyioctl(), cttyselect();
 110
 111 extern int      mmread(),mmwrite();
 112 #define mmselect        (select_fcn_t *)seltrue
 113 #define mmmmap          eno_mmap
 114
 115 #include <pty.h>
 116 #if NPTY > 0
 117 extern struct tty *pt_tty[];
 118 extern int      ptsopen(),ptsclose(),ptsread(),ptswrite(),ptsstop(),ptsputc();
 119 extern int      ptcopen(),ptcclose(),ptcread(),ptcwrite(),ptcselect(),
 120                 ptyioctl();
 121 #else
 122 #define ptsopen         eno_opcl
 123 #define ptsclose        eno_opcl
 124 #define ptsread         eno_rdwrt
 125 #define ptswrite        eno_rdwrt
 126 #define ptsstop         nulldev
 127 #define ptsputc         nulldev
 128
 129 #define ptcopen         eno_opcl
 130 #define ptcclose        eno_opcl
 131 #define ptcread         eno_rdwrt
 132 #define ptcwrite        eno_rdwrt
 133 #define ptcselect       eno_select
 134 #define ptyioctl        eno_ioctl
 135 #endif
 136
 137 extern int      logopen(),logclose(),logread(),logioctl(),logselect();
 138 extern int      fdesc_open(), fdesc_read(), fdesc_write(),
 139                 fdesc_ioctl(), fdesc_select();
 140
 141 struct cdevsw   cdevsw[] =
 142 {
 143         /*
 144          *      For character devices, every other block of 16 slots is
 145          *      reserved to NeXT.  The other slots are available for
 146          *      the user.  This way we can both add new entries without
 147          *      running into each other.  Be sure to fill in NeXT's
 148          *      16 reserved slots when you jump over us -- we'll do the
 149          *      same for you.
 150          */
 151
 152         /* 0 - 15 are reserved to NeXT */
 153
 154     {
 155         cnopen,         cnclose,        cnread,         cnwrite,        /* 0*/
 156         cnioctl,        nulldev,        nulldev,        0,              cnselect,
 157         eno_mmap,       eno_strat,      cngetc,         cnputc,         D_TTY
 158     },
 159     NO_CDEVICE,                                                         /* 1*/
 160     {
 161         cttyopen,       nulldev,        cttyread,       cttywrite,      /* 2*/
 162         cttyioctl,      nulldev,        nulldev,        0,              cttyselect,
 163         eno_mmap,       eno_strat,      eno_getc,       eno_putc,       D_TTY
 164     },
 165     {
 166         nulldev,        nulldev,        mmread,         mmwrite,        /* 3*/
 167         eno_ioctl,      nulldev,        nulldev,        0,              mmselect,
 168         mmmmap,         eno_strat,      eno_getc,       eno_putc,       0
 169     },
 170     {
 171         ptsopen,        ptsclose,       ptsread,        ptswrite,       /* 4*/
 172         ptyioctl,       ptsstop,        nulldev,        pt_tty,         ttselect,
 173         eno_mmap,       eno_strat,      eno_getc,       eno_putc,       D_TTY
 174     },
 175     {
 176         ptcopen,        ptcclose,       ptcread,        ptcwrite,       /* 5*/
 177         ptyioctl,       nulldev,        nulldev,        0,              ptcselect,
 178         eno_mmap,       eno_strat,      eno_getc,       eno_putc,       D_TTY
 179     },
 180     {
 181         logopen,        logclose,       logread,        eno_rdwrt,      /* 6*/
 182         logioctl,       eno_stop,       nulldev,        0,              logselect,
 183         eno_mmap,       eno_strat,      eno_getc,       eno_putc,       0
 184     },
 185     NO_CDEVICE,                                                         /* 7*/
 186     NO_CDEVICE,                                                         /* 8*/
 187     NO_CDEVICE,                                                         /* 9*/
 188     NO_CDEVICE,                                                         /*10*/
 189     NO_CDEVICE,                                                         /*11*/
 190     {
 191         kmopen,         kmclose,        kmread,         kmwrite,        /*12*/
 192         kmioctl,        nulldev,        nulldev,        km_tty,         ttselect,
 193         eno_mmap,       eno_strat,      kmgetc,         kmputc,         0
 194     },
 195     NO_CDEVICE,                                                         /*13*/
 196     NO_CDEVICE,                                                         /*14*/
 197     NO_CDEVICE,                                                         /*15*/
 198
 199         /* 16 - 31 are reserved to the user */
 200     NO_CDEVICE,                                                         /*16*/
 201     NO_CDEVICE,                                                         /*17*/
 202     NO_CDEVICE,                                                         /*18*/
 203     NO_CDEVICE,                                                         /*19*/
 204     NO_CDEVICE,                                                         /*20*/
 205     NO_CDEVICE,                                                         /*21*/
 206     NO_CDEVICE,                                                         /*22*/
 207     NO_CDEVICE,                                                         /*23*/
 208     NO_CDEVICE,                                                         /*24*/
 209     NO_CDEVICE,                                                         /*25*/
 210     NO_CDEVICE,                                                         /*26*/
 211     NO_CDEVICE,                                                         /*27*/
 212     NO_CDEVICE,                                                         /*28*/
 213     NO_CDEVICE,                                                         /*29*/
 214     NO_CDEVICE,                                                         /*30*/
 215     NO_CDEVICE,                                                         /*31*/
 216
 217         /* 32 - 47 are reserved to NeXT */
 218     {
 219         fdesc_open,     eno_opcl,       fdesc_read,     fdesc_write,    /*32*/
 220         fdesc_ioctl,    eno_stop,       eno_reset,      0,              fdesc_select,
 221         eno_mmap,       eno_strat,      eno_getc,       eno_putc,       0
 222     },
 223 #if 1
 224    NO_CDEVICE,
 225 #else
 226     {
 227         sgopen,         sgclose,        eno_rdwrt,      eno_rdwrt,      /*33*/
 228         sgioctl,        eno_stop,       eno_reset,      0,              eno_select,
 229         eno_mmap,       eno_strat,      eno_getc,       eno_putc,       D_TAPE
 230     },
 231 #endif
 232     NO_CDEVICE,                                                         /*34*/
 233     NO_CDEVICE,                                                         /*35*/
 234     NO_CDEVICE,                                                         /*36*/
 235     NO_CDEVICE,                                                         /*37*/
 236     NO_CDEVICE,                                                         /*38*/
 237     NO_CDEVICE,                                                         /*39*/
 238     NO_CDEVICE,                                                         /*40*/
 239     NO_CDEVICE,                                                         /*41*/
 240     {
 241         volopen,        volclose,       eno_rdwrt,      eno_rdwrt,      /*42*/
 242         volioctl,       eno_stop,       eno_reset,      0,              (select_fcn_t *)seltrue,
 243         eno_mmap,       eno_strat,      eno_getc,       eno_putc,       0
 244     },
 245 };
 246 int     nchrdev = sizeof (cdevsw) / sizeof (cdevsw[0]);
 247
 248
 249 #include        <sys/vnode.h> /* for VCHR and VBLK */
 250 /*
 251  * return true if a disk
 252  */
 253 int
 254 isdisk(dev, type)
 255         dev_t dev;
 256         int type;
 257 {
 258         dev_t   maj = major(dev);
 259
 260         switch (type) {
 261         case VCHR:
 262                 maj = chrtoblk(maj);
 263                 if (maj == NODEV) {
 264                         break;
 265                 }
 266                 /* FALL THROUGH */
 267         case VBLK:
 268                 if (bdevsw[maj].d_type == D_DISK) {
 269                         return (1);
 270                 }
 271                 break;
 272         }
 273         return(0);
 274 }
 275
 276 static int chrtoblktab[] = {
 277         /* CHR*/        /* BLK*/        /* CHR*/        /* BLK*/
 278         /*  0 */        NODEV,          /*  1 */        NODEV,
 279         /*  2 */        NODEV,          /*  3 */        NODEV,
 280         /*  4 */        NODEV,          /*  5 */        NODEV,
 281         /*  6 */        NODEV,          /*  7 */        NODEV,
 282         /*  8 */        NODEV,          /*  9 */        NODEV,
 283         /* 10 */        NODEV,          /* 11 */        NODEV,
 284         /* 12 */        NODEV,          /* 13 */        NODEV,
 285         /* 14 */        6,              /* 15 */        NODEV,
 286         /* 16 */        NODEV,          /* 17 */        NODEV,
 287         /* 18 */        NODEV,          /* 19 */        NODEV,
 288         /* 20 */        NODEV,          /* 21 */        NODEV,
 289         /* 22 */        NODEV,          /* 23 */        NODEV,
 290         /* 24 */        NODEV,          /* 25 */        NODEV,
 291         /* 26 */        NODEV,          /* 27 */        NODEV,
 292         /* 28 */        NODEV,          /* 29 */        NODEV,
 293         /* 30 */        NODEV,          /* 31 */        NODEV,
 294         /* 32 */        NODEV,          /* 33 */        NODEV,
 295         /* 34 */        NODEV,          /* 35 */        NODEV,
 296         /* 36 */        NODEV,          /* 37 */        NODEV,
 297         /* 38 */        NODEV,          /* 39 */        NODEV,
 298         /* 40 */        NODEV,          /* 41 */        1,
 299         /* 42 */        NODEV,          /* 43 */        NODEV,
 300         /* 44 */        NODEV,
 301 };
 302
 303 /*
 304  * convert chr dev to blk dev
 305  */
 306 dev_t
 307 chrtoblk(dev)
 308         dev_t dev;
 309 {
 310         int blkmaj;
 311
 312         if (major(dev) >= nchrdev)
 313                 return(NODEV);
 314         blkmaj = chrtoblktab[major(dev)];
 315         if (blkmaj == NODEV)
 316                 return(NODEV);
 317         return(makedev(blkmaj, minor(dev)));
 318 }
 319
 320 int
 321 chrtoblk_set(int cdev, int bdev)
 322 {
 323         if (cdev >= nchrdev)
 324                 return (-1);
 325         if (bdev != NODEV && bdev >= nblkdev)
 326                 return (-1);
 327         chrtoblktab[cdev] = bdev;
 328         return 0;
 329 }
 330
 331 /*
 332  * Returns true if dev is /dev/mem or /dev/kmem.
 333  */
 334 int iskmemdev(dev)
 335         dev_t dev;
 336 {
 337
 338         return (major(dev) == 3 && minor(dev) < 2);
 339 }