conf.c revision 1.2
1 /* $NetBSD: conf.c,v 1.2 1995/08/17 17:40:54 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1991 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)conf.c 7.9 (Berkeley) 5/28/91 36 */ 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/buf.h> 41 #include <sys/ioctl.h> 42 #include <sys/tty.h> 43 #include <sys/conf.h> 44 #include <sys/vnode.h> 45 46 int ttselect __P((dev_t, int, struct proc *)); 47 48 #ifdef LKM 49 int lkmenodev(); 50 #else 51 #define lkmenodev enodev 52 #endif 53 54 #include "vnd.h" 55 bdev_decl(vnd); 56 bdev_decl(sw); 57 #include "sd.h" 58 bdev_decl(sd); 59 #include "cd.h" 60 bdev_decl(cd); 61 #include "st.h" 62 bdev_decl(st); 63 #include "ccd.h" 64 bdev_decl(ccd); 65 66 struct bdevsw bdevsw[] = 67 { 68 bdev_notdef(), /* 0 */ 69 bdev_notdef(), /* 1 */ 70 bdev_notdef(), /* 2 */ 71 bdev_swap_init(1,sw), /* 3: swap pseudo-device */ 72 bdev_disk_init(NSD,sd), /* 4: SCSI disk */ 73 bdev_tape_init(NST,st), /* 5: SCSI tape */ 74 bdev_disk_init(NVND,vnd), /* 6: vnode disk driver */ 75 bdev_disk_init(NCD,cd), /* 7: SCSI CD-ROM */ 76 bdev_notdef(), /* 8 */ 77 bdev_lkm_dummy(), /* 9 */ 78 bdev_lkm_dummy(), /* 10 */ 79 bdev_lkm_dummy(), /* 11 */ 80 bdev_lkm_dummy(), /* 12 */ 81 bdev_lkm_dummy(), /* 13 */ 82 bdev_lkm_dummy(), /* 14 */ 83 bdev_disk_init(NCCD,ccd), /* 15: concatenated disk driver */ 84 }; 85 86 int nblkdev = sizeof (bdevsw) / sizeof (bdevsw[0]); 87 88 cdev_decl(cn); 89 cdev_decl(ctty); 90 #define mmread mmrw 91 #define mmwrite mmrw 92 cdev_decl(mm); 93 cdev_decl(sw); 94 95 #include "pty.h" 96 #define ptstty ptytty 97 #define ptsioctl ptyioctl 98 cdev_decl(pts); 99 #define ptctty ptytty 100 #define ptcioctl ptyioctl 101 cdev_decl(ptc); 102 103 cdev_decl(log); 104 cdev_decl(fd); 105 106 #include "zs.h" 107 cdev_decl(zs); 108 109 cdev_decl(sd); 110 cdev_decl(cd); 111 cdev_decl(st); 112 cdev_decl(vnd); 113 cdev_decl(ccd); 114 115 #include "bpfilter.h" 116 cdev_decl(bpf); 117 118 #include "tun.h" 119 cdev_decl(tun); 120 #ifdef LKM 121 #define NLKM 1 122 #else 123 #define NLKM 0 124 #endif 125 cdev_decl(lkm); 126 127 struct cdevsw cdevsw[] = 128 { 129 cdev_cn_init(1,cn), /* 0: virtual console */ 130 cdev_ctty_init(1,ctty), /* 1: controlling terminal */ 131 cdev_mm_init(1,mm), /* 2: /dev/{null,mem,kmem,...} */ 132 cdev_swap_init(1,sw), /* 3: /dev/drum (swap pseudo-device) */ 133 cdev_tty_init(NPTY,pts), /* 4: pseudo-tty slave */ 134 cdev_ptc_init(NPTY,ptc), /* 5: pseudo-tty master */ 135 cdev_log_init(1,log), /* 6: /dev/klog */ 136 cdev_notdef(), /* 7 */ 137 cdev_disk_init(NSD,sd), /* 8: SCSI disk */ 138 cdev_disk_init(NCD,cd), /* 9: SCSI CD-ROM */ 139 cdev_notdef(), /* 10 */ 140 cdev_notdef(), /* 11: parallel interface */ 141 cdev_tty_init(NZS,zs), /* 12: SCC serial ports */ 142 cdev_notdef(), /* 13 */ 143 cdev_notdef(), /* 14 */ 144 cdev_notdef(), /* 15 */ 145 cdev_notdef(), /* 16 */ 146 cdev_disk_init(NCCD,ccd), /* 17: concatenated disk driver */ 147 cdev_notdef(), /* 18 */ 148 cdev_disk_init(NVND,vnd), /* 19: vnode disk */ 149 cdev_tape_init(NST,st), /* 20: SCSI tape */ 150 cdev_fd_init(1,fd), /* 21: file descriptor pseudo-dev */ 151 cdev_bpftun_init(NBPFILTER,bpf),/* 22: berkeley packet filter */ 152 cdev_bpftun_init(NTUN,tun), /* 23: network tunnel */ 153 cdev_lkm_init(NLKM,lkm), /* 24: loadable module driver */ 154 cdev_lkm_dummy(), /* 25 */ 155 cdev_lkm_dummy(), /* 26 */ 156 cdev_lkm_dummy(), /* 27 */ 157 cdev_lkm_dummy(), /* 28 */ 158 cdev_lkm_dummy(), /* 29 */ 159 cdev_lkm_dummy(), /* 30 */ 160 }; 161 162 int nchrdev = sizeof (cdevsw) / sizeof (cdevsw[0]); 163 164 int mem_no = 2; /* major device number of memory special file */ 165 166 /* 167 * Swapdev is a fake device implemented 168 * in sw.c used only internally to get to swstrategy. 169 * It cannot be provided to the users, because the 170 * swstrategy routine munches the b_dev and b_blkno entries 171 * before calling the appropriate driver. This would horribly 172 * confuse, e.g. the hashing routines. Instead, /dev/drum is 173 * provided as a character (raw) device. 174 */ 175 dev_t swapdev = makedev(3, 0); 176 177 /* 178 * Returns true if dev is /dev/mem or /dev/kmem. 179 */ 180 iskmemdev(dev) 181 dev_t dev; 182 { 183 184 return (major(dev) == mem_no && minor(dev) < 2); 185 } 186 187 /* 188 * Returns true if dev is /dev/zero. 189 */ 190 iszerodev(dev) 191 dev_t dev; 192 { 193 194 return (major(dev) == mem_no && minor(dev) == 12); 195 } 196 197 /* 198 * Returns true if dev is a disk device. 199 */ 200 isdisk(dev, type) 201 dev_t dev; 202 int type; 203 { 204 205 /* XXXX This needs to be dynamic for LKMs. */ 206 switch (major(dev)) { 207 case 1: 208 case 2: 209 case 4: 210 case 6: 211 case 15: 212 return (type == VBLK); 213 case 8: 214 case 9: 215 case 10: 216 case 17: 217 case 19: 218 return (type == VCHR); 219 default: 220 return (0); 221 } 222 } 223 224 static int chrtoblktbl[] = { 225 /* XXXX This needs to be dynamic for LKMs. */ 226 /*VCHR*/ /*VBLK*/ 227 /* 0 */ NODEV, 228 /* 1 */ NODEV, 229 /* 2 */ NODEV, 230 /* 3 */ NODEV, 231 /* 4 */ NODEV, 232 /* 5 */ NODEV, 233 /* 6 */ NODEV, 234 /* 7 */ NODEV, 235 /* 8 */ 4, 236 /* 9 */ 7, 237 /* 10 */ NODEV, 238 /* 11 */ NODEV, 239 /* 12 */ NODEV, 240 /* 13 */ NODEV, 241 /* 14 */ NODEV, 242 /* 15 */ NODEV, 243 /* 16 */ NODEV, 244 /* 17 */ 15, 245 /* 18 */ NODEV, 246 /* 19 */ 6, 247 /* 20 */ NODEV, 248 /* 21 */ NODEV, 249 /* 22 */ NODEV, 250 }; 251 252 /* 253 * Convert a character device number to a block device number. 254 */ 255 chrtoblk(dev) 256 dev_t dev; 257 { 258 int blkmaj; 259 260 if (major(dev) >= nchrdev) 261 return (NODEV); 262 blkmaj = chrtoblktbl[major(dev)]; 263 if (blkmaj == NODEV) 264 return (NODEV); 265 return (makedev(blkmaj, minor(dev))); 266 } 267 268 /* 269 * This entire table could be autoconfig()ed but that would mean that 270 * the kernel's idea of the console would be out of sync with that of 271 * the standalone boot. I think it best that they both use the same 272 * known algorithm unless we see a pressing need otherwise. 273 */ 274 #include <dev/cons.h> 275 276 #define zscnpollc nullcnpollc 277 cons_decl(zs); 278 279 struct consdev constab[] = { 280 #if NZS > 0 281 cons_init(zs), 282 #endif 283 { 0 }, 284 }; 285
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