bsd/dev/ppc/conf.c

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