bsd/dev/ppc/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      consopen(), consclose(), consread(), conswrite(), consioctl(),
  96                 consselect(), cons_getc(), cons_putc();
  97 extern int      kmopen(),kmclose(),kmread(),kmwrite(),kmioctl(),
  98                 kmgetc(), kmputc(dev_t dev, char c);
  99
 100 extern int      cttyopen(), cttyread(), cttywrite(), cttyioctl(), cttyselect();
 101
 102 extern int      mmread(),mmwrite();
 103 #define mmselect        seltrue
 104
 105 #if 1
 106 #define NPTY 32
 107 #else /* 1 */
 108 #include <pty.h>
 109 #endif /* 1 */
 110 #if NPTY > 0
 111 extern struct tty *pt_tty[];
 112 extern int      ptsopen(),ptsclose(),ptsread(),ptswrite(),ptsstop(),ptsputc();
 113 extern int      ptcopen(),ptcclose(),ptcread(),ptcwrite(),ptcselect(),
 114                 ptyioctl();
 115 #else
 116 #define ptsopen         eno_opcl
 117 #define ptsclose        eno_opcl
 118 #define ptsread         eno_rdwrt
 119 #define ptswrite        eno_rdwrt
 120 #define ptsstop         nulldev
 121 #define ptsputc         nulldev
 122
 123 #define ptcopen         eno_opcl
 124 #define ptcclose        eno_opcl
 125 #define ptcread         eno_rdwrt
 126 #define ptcwrite        eno_rdwrt
 127 #define ptcselect       eno_select
 128 #define ptyioctl        eno_ioctl
 129 #endif
 130
 131 extern int      logopen(),logclose(),logread(),logioctl(),logselect();
 132 extern int      seltrue();
 133
 134 struct cdevsw   cdevsw[] =
 135 {
 136         /*
 137          *      For character devices, every other block of 16 slots is
 138          *      reserved to NeXT.  The other slots are available for
 139          *      the user.  This way we can both add new entries without
 140          *      running into each other.  Be sure to fill in NeXT's
 141          *      16 reserved slots when you jump over us -- we'll do the
 142          *      same for you.
 143          */
 144
 145         /* 0 - 15 are reserved to NeXT */
 146
 147     {
 148         consopen,       consclose,      consread,       conswrite,      /* 0*/
 149         consioctl,      nulldev,        nulldev,        0,      consselect,
 150         eno_mmap,       eno_strat,      cons_getc,      cons_putc, D_TTY
 151    },
 152     NO_CDEVICE,                                                         /* 1*/
 153     {
 154         cttyopen,       nulldev,        cttyread,       cttywrite,      /* 2*/
 155         cttyioctl,      nulldev,        nulldev,        0,              cttyselect,
 156         eno_mmap,       eno_strat,      eno_getc,       eno_putc,       D_TTY
 157     },
 158     {
 159         nulldev,        nulldev,        mmread,         mmwrite,        /* 3*/
 160         eno_ioctl,      nulldev,        nulldev,        0,              mmselect,
 161         eno_mmap,               eno_strat,      eno_getc,       eno_putc,       0
 162     },
 163     {
 164         ptsopen,        ptsclose,       ptsread,        ptswrite,       /* 4*/
 165         ptyioctl,       ptsstop,        nulldev,        pt_tty,         ttselect,
 166         eno_mmap,       eno_strat,      eno_getc,       eno_putc,       D_TTY
 167     },
 168     {
 169         ptcopen,        ptcclose,       ptcread,        ptcwrite,       /* 5*/
 170         ptyioctl,       nulldev,        nulldev,        0,              ptcselect,
 171         eno_mmap,       eno_strat,      eno_getc,       eno_putc,       D_TTY
 172     },
 173     {
 174         logopen,        logclose,       logread,        eno_rdwrt,      /* 6*/
 175         logioctl,       eno_stop,       nulldev,        0,              logselect,
 176         eno_mmap,       eno_strat,      eno_getc,       eno_putc,       0
 177     },
 178     NO_CDEVICE,                                                         /* 7*/
 179     NO_CDEVICE,                                                         /* 8*/
 180     NO_CDEVICE,                                                         /* 9*/
 181     NO_CDEVICE,                                                         /*10*/
 182     NO_CDEVICE,                                                         /*11*/
 183     {
 184         kmopen,         kmclose,        kmread,         kmwrite,        /*12*/
 185         kmioctl,        nulldev,        nulldev,        km_tty,         ttselect,
 186         eno_mmap,       eno_strat,      kmgetc,         kmputc,         0
 187     },
 188     NO_CDEVICE,                                                         /*13*/
 189     NO_CDEVICE,                                                         /*14*/
 190     NO_CDEVICE,                                                         /*15*/
 191
 192         /* 16 - 31 are reserved to the user */
 193     NO_CDEVICE,                                                         /*16*/
 194     NO_CDEVICE,                                                         /*17*/
 195     NO_CDEVICE,                                                         /*18*/
 196     NO_CDEVICE,                                                         /*19*/
 197     NO_CDEVICE,                                                         /*20*/
 198     NO_CDEVICE,                                                         /*21*/
 199     NO_CDEVICE,                                                         /*22*/
 200     NO_CDEVICE,                                                         /*23*/
 201     NO_CDEVICE,                                                         /*24*/
 202     NO_CDEVICE,                                                         /*25*/
 203     NO_CDEVICE,                                                         /*26*/
 204     NO_CDEVICE,                                                         /*27*/
 205     NO_CDEVICE,                                                         /*28*/
 206     NO_CDEVICE,                                                         /*29*/
 207     NO_CDEVICE,                                                         /*30*/
 208     NO_CDEVICE,                                                         /*31*/
 209
 210         /* 32 - 47 are reserved to NeXT */
 211     NO_CDEVICE,                                                         /*32*/
 212     NO_CDEVICE,                                                         /*33*/
 213     NO_CDEVICE,                                                         /*34*/
 214     NO_CDEVICE,                                                         /*35*/
 215     NO_CDEVICE,                                                         /*36*/
 216         /* 37 used to be for nvram */
 217     NO_CDEVICE,                                                         /*37*/
 218     NO_CDEVICE,                                                         /*38*/
 219     NO_CDEVICE,                                                         /*39*/
 220     NO_CDEVICE,                                                         /*40*/
 221         /* 41 used to be for fd */
 222     NO_CDEVICE,                                                         /*41*/
 223     NO_CDEVICE,                                                         /*42*/
 224 };
 225 int     nchrdev = sizeof (cdevsw) / sizeof (cdevsw[0]);
 226
 227
 228 #include        <sys/vnode.h> /* for VCHR and VBLK */
 229 /*
 230  * return true if a disk
 231  */
 232 int
 233 isdisk(dev, type)
 234         dev_t dev;
 235         int type;
 236 {
 237         dev_t   maj = major(dev);
 238
 239         switch (type) {
 240         case VCHR:
 241                 maj = chrtoblk(maj);
 242                 if (maj == NODEV) {
 243                         break;
 244                 }
 245                 /* FALL THROUGH */
 246         case VBLK:
 247                 if (bdevsw[maj].d_type == D_DISK) {
 248                         return (1);
 249                 }
 250                 break;
 251         }
 252         return(0);
 253 }
 254
 255 static int chrtoblktab[] = {
 256         /* CHR*/        /* BLK*/        /* CHR*/        /* BLK*/
 257         /*  0 */        NODEV,          /*  1 */        NODEV,
 258         /*  2 */        NODEV,          /*  3 */        NODEV,
 259         /*  4 */        NODEV,          /*  5 */        NODEV,
 260         /*  6 */        NODEV,          /*  7 */        NODEV,
 261         /*  8 */        NODEV,          /*  9 */        NODEV,
 262         /* 10 */        NODEV,          /* 11 */        NODEV,
 263         /* 12 */        NODEV,          /* 13 */        NODEV,
 264         /* 14 */        6,              /* 15 */        NODEV,
 265         /* 16 */        NODEV,          /* 17 */        NODEV,
 266         /* 18 */        NODEV,          /* 19 */        NODEV,
 267         /* 20 */        NODEV,          /* 21 */        NODEV,
 268         /* 22 */        NODEV,          /* 23 */        NODEV,
 269         /* 24 */        NODEV,          /* 25 */        NODEV,
 270         /* 26 */        NODEV,          /* 27 */        NODEV,
 271         /* 28 */        NODEV,          /* 29 */        NODEV,
 272         /* 30 */        NODEV,          /* 31 */        NODEV,
 273         /* 32 */        NODEV,          /* 33 */        NODEV,
 274         /* 34 */        NODEV,          /* 35 */        NODEV,
 275         /* 36 */        NODEV,          /* 37 */        NODEV,
 276         /* 38 */        NODEV,          /* 39 */        NODEV,
 277         /* 40 */        NODEV,          /* 41 */        1,
 278         /* 42 */        NODEV,          /* 43 */        NODEV,
 279         /* 44 */        NODEV,
 280 };
 281
 282 /*
 283  * convert chr dev to blk dev
 284  */
 285 dev_t
 286 chrtoblk(dev)
 287         dev_t dev;
 288 {
 289         int blkmaj;
 290
 291         if (major(dev) >= nchrdev)
 292                 return(NODEV);
 293         blkmaj = chrtoblktab[major(dev)];
 294         if (blkmaj == NODEV)
 295                 return(NODEV);
 296         return(makedev(blkmaj, minor(dev)));
 297 }
 298
 299 int
 300 chrtoblk_set(int cdev, int bdev)
 301 {
 302         if (cdev >= nchrdev)
 303                 return (NODEV);
 304         if (bdev != NODEV && bdev >= nblkdev)
 305                 return (NODEV);
 306         chrtoblktab[cdev] = bdev;
 307         return 0;
 308 }
 309
 310 /*
 311  * Returns true if dev is /dev/mem or /dev/kmem.
 312  */
 313 int iskmemdev(dev)
 314         dev_t dev;
 315 {
 316
 317         return (major(dev) == 3 && minor(dev) < 2);
 318 }