1 /* 2 * Copyright (c) 2000-2012 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 /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */ 29 /*- 30 * Copyright (c) 1990, 1993 31 * The Regents of the University of California. All rights reserved. 32 * (c) UNIX System Laboratories, Inc. 33 * All or some portions of this file are derived from material licensed 34 * to the University of California by American Telephone and Telegraph 35 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 36 * the permission of UNIX System Laboratories, Inc. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 1. Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * 2. Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in the 45 * documentation and/or other materials provided with the distribution. 46 * 3. All advertising materials mentioning features or use of this software 47 * must display the following acknowledgement: 48 * This product includes software developed by the University of 49 * California, Berkeley and its contributors. 50 * 4. Neither the name of the University nor the names of its contributors 51 * may be used to endorse or promote products derived from this software 52 * without specific prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 57 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 64 * SUCH DAMAGE. 65 * 66 * @(#)conf.h 8.5 (Berkeley) 1/9/95 67 */ 68 69 #ifndef _SYS_CONF_H_ 70 #define _SYS_CONF_H_ 1 71 72 #include <sys/appleapiopts.h> 73 #include <sys/cdefs.h> 74 #include <sys/queue.h> 75 #include <stdint.h> 76 77 /* 78 * Definitions of device driver entry switches 79 */ 80 81 struct buf; 82 struct proc; 83 struct tty; 84 struct uio; 85 struct vnode; 86 87 /* 88 * Types for d_type. 89 * These are returned by ioctl FIODTYPE 90 */ 91 #define D_TAPE 1 92 #define D_DISK 2 93 #define D_TTY 3 94 95 #ifdef KERNEL 96 /* 97 * Device switch function types. 98 */ 99 typedef int open_close_fcn_t(dev_t dev, int flags, int devtype, 100 struct proc *p); 101 102 typedef struct tty *d_devtotty_t(dev_t dev); 103 104 typedef void strategy_fcn_t(struct buf *bp); 105 typedef int ioctl_fcn_t(dev_t dev, u_long cmd, 106 caddr_t __sized_by(IOCPARM_LEN(cmd)) data, 107 int fflag, struct proc *p); 108 typedef int dump_fcn_t(void); /* parameters vary by architecture */ 109 typedef int psize_fcn_t(dev_t dev); 110 typedef int read_write_fcn_t(dev_t dev, struct uio *uio, int ioflag); 111 typedef int stop_fcn_t(struct tty *tp, int rw); 112 typedef int reset_fcn_t(int uban); 113 typedef int select_fcn_t(dev_t dev, int which, void * wql, struct proc *p); 114 typedef int mmap_fcn_t(void); 115 typedef int rsvd_fcn_t(void); 116 117 typedef void empty_fcn_t(void); 118 119 #define d_open_t open_close_fcn_t 120 #define d_close_t open_close_fcn_t 121 #define d_read_t read_write_fcn_t 122 #define d_write_t read_write_fcn_t 123 #define d_ioctl_t ioctl_fcn_t 124 #define d_stop_t stop_fcn_t 125 #define d_reset_t reset_fcn_t 126 #define d_select_t select_fcn_t 127 #define d_mmap_t mmap_fcn_t 128 #define d_strategy_t strategy_fcn_t 129 130 131 __BEGIN_DECLS 132 int enodev(void); 133 void enodev_strat(void); 134 __END_DECLS 135 136 /* 137 * Versions of enodev() pointer, cast to appropriate function type. For use 138 * in empty devsw slots. 139 */ 140 #define eno_opcl ((open_close_fcn_t *)(empty_fcn_t*)&enodev) 141 #define eno_strat ((strategy_fcn_t *)(empty_fcn_t*)&enodev_strat) 142 #define eno_ioctl ((ioctl_fcn_t *)(empty_fcn_t*)&enodev) 143 #define eno_dump ((dump_fcn_t *)(empty_fcn_t*)&enodev) 144 #define eno_psize ((psize_fcn_t *)(empty_fcn_t*)&enodev) 145 #define eno_rdwrt ((read_write_fcn_t *)(empty_fcn_t*)&enodev) 146 #define eno_stop ((stop_fcn_t *)(empty_fcn_t*)&enodev) 147 #define eno_reset ((reset_fcn_t *)(empty_fcn_t*)&enodev) 148 #define eno_mmap ((mmap_fcn_t *)(empty_fcn_t*)&enodev) 149 #define eno_select ((select_fcn_t *)(empty_fcn_t*)&enodev) 150 151 /* For source backward compatibility only! */ 152 #define eno_getc ((rsvd_fcn_t *)&enodev) 153 #define eno_putc ((rsvd_fcn_t *)&enodev) 154 155 /* 156 * Block device switch table 157 */ 158 struct bdevsw { 159 open_close_fcn_t *d_open; 160 open_close_fcn_t *d_close; 161 strategy_fcn_t *d_strategy; 162 ioctl_fcn_t *d_ioctl; 163 dump_fcn_t *d_dump; 164 psize_fcn_t *d_psize; 165 int d_type; 166 }; 167 168 169 d_devtotty_t nodevtotty; 170 d_write_t nowrite; 171 172 #ifdef KERNEL_PRIVATE 173 extern struct bdevsw bdevsw[]; 174 extern int (*bootcache_contains_block)(dev_t device, u_int64_t blkno); 175 #endif /* KERNEL_PRIVATE */ 176 177 /* 178 * Contents of empty bdevsw slot. 179 */ 180 #define NO_BDEVICE \ 181 { eno_opcl, eno_opcl, eno_strat, eno_ioctl, \ 182 eno_dump, eno_psize, 0 } 183 184 185 /* 186 * Character device switch table 187 */ 188 struct cdevsw { 189 open_close_fcn_t *d_open; 190 open_close_fcn_t *d_close; 191 read_write_fcn_t *d_read; 192 read_write_fcn_t *d_write; 193 ioctl_fcn_t *d_ioctl; 194 stop_fcn_t *d_stop; 195 reset_fcn_t *d_reset; 196 struct tty **d_ttys; 197 select_fcn_t *d_select; 198 mmap_fcn_t *d_mmap; 199 strategy_fcn_t *d_strategy; 200 rsvd_fcn_t *d_reserved_1; 201 rsvd_fcn_t *d_reserved_2; 202 int d_type; 203 }; 204 205 #ifdef BSD_KERNEL_PRIVATE 206 207 extern uint64_t cdevsw_flags[]; 208 #define CDEVSW_SELECT_KQUEUE 0x01 209 #define CDEVSW_USE_OFFSET 0x02 210 #define CDEVSW_IS_PTC 0x04 211 #define CDEVSW_IS_PTS 0x08 212 213 struct thread; 214 #endif /* BSD_KERNEL_PRIVATE */ 215 216 217 /* 218 * Contents of empty cdevsw slot. 219 */ 220 221 #define NO_CDEVICE \ 222 { \ 223 eno_opcl, eno_opcl, eno_rdwrt, eno_rdwrt, \ 224 eno_ioctl, eno_stop, eno_reset, 0, \ 225 (select_fcn_t *)(void (*)(void))seltrue, eno_mmap, \ 226 eno_strat, eno_getc, \ 227 eno_putc, 0 \ 228 } 229 230 #endif /* KERNEL */ 231 232 #ifdef KERNEL_PRIVATE 233 typedef int l_open_t (dev_t dev, struct tty *tp); 234 typedef int l_close_t(struct tty *tp, int flags); 235 typedef int l_read_t (struct tty *tp, struct uio *uio, int flag); 236 typedef int l_write_t(struct tty *tp, struct uio *uio, int flag); 237 typedef int l_ioctl_t(struct tty *tp, u_long cmd, caddr_t data, int flag, 238 struct proc *p); 239 typedef int l_rint_t (int c, struct tty *tp); 240 typedef void l_start_t(struct tty *tp); 241 typedef int l_modem_t(struct tty *tp, int flag); 242 243 /* 244 * Line discipline switch table 245 */ 246 struct linesw { 247 l_open_t *l_open; 248 l_close_t *l_close; 249 l_read_t *l_read; 250 l_write_t *l_write; 251 l_ioctl_t *l_ioctl; 252 l_rint_t *l_rint; 253 l_start_t *l_start; 254 l_modem_t *l_modem; 255 }; 256 257 258 extern struct linesw linesw[]; 259 extern const int nlinesw; 260 261 int ldisc_register(int, struct linesw *); 262 void ldisc_deregister(int); 263 #define LDISC_LOAD -1 /* Loadable line discipline */ 264 265 #endif /* KERNEL_PRIVATE */ 266 267 #ifdef BSD_KERNEL_PRIVATE 268 /* 269 * Swap device table 270 */ 271 struct swdevt { 272 dev_t sw_dev; 273 int sw_flags; 274 int sw_nblks; 275 struct vnode *sw_vp; 276 }; 277 #define SW_FREED 0x01 278 #define SW_SEQUENTIAL 0x02 279 #define sw_freed sw_flags /* XXX compat */ 280 281 extern struct swdevt swdevt[]; 282 283 #endif /* BSD_KERNEL_PRIVATE */ 284 285 286 #ifdef KERNEL 287 /* 288 * ***_free finds free slot; 289 * ***_add adds entries to the devsw table 290 * If int arg is -1; finds a free slot 291 * Returns the major number if successful 292 * else -1 293 */ 294 __BEGIN_DECLS 295 #ifdef KERNEL_PRIVATE 296 extern struct cdevsw cdevsw[]; 297 extern int cdevsw_setkqueueok(int, const struct cdevsw*, int); 298 #endif /* KERNEL_PRIVATE */ 299 300 #ifdef BSD_KERNEL_PRIVATE 301 extern void devsw_lock(dev_t, int); 302 extern void devsw_unlock(dev_t, int); 303 #endif /* BSD_KERNEL_PRIVATE */ 304 305 int bdevsw_isfree(int); 306 int bdevsw_add(int, const struct bdevsw *); 307 int bdevsw_remove(int, const struct bdevsw *); 308 int cdevsw_isfree(int); 309 int cdevsw_add(int, const struct cdevsw *); 310 int cdevsw_add_with_bdev(int index, const struct cdevsw * csw, int bdev); 311 int cdevsw_remove(int, const struct cdevsw *); 312 int isdisk(dev_t, int); 313 __END_DECLS 314 #endif /* KERNEL */ 315 316 #endif /* _SYS_CONF_H_ */ 317