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, caddr_t data, 106 int fflag, struct proc *p); 107 typedef int dump_fcn_t(void); /* parameters vary by architecture */ 108 typedef int psize_fcn_t(dev_t dev); 109 typedef int read_write_fcn_t(dev_t dev, struct uio *uio, int ioflag); 110 typedef int stop_fcn_t(struct tty *tp, int rw); 111 typedef int reset_fcn_t(int uban); 112 typedef int select_fcn_t(dev_t dev, int which, void * wql, struct proc *p); 113 typedef int mmap_fcn_t(void); 114 typedef int rsvd_fcn_t(void); 115 116 #define d_open_t open_close_fcn_t 117 #define d_close_t open_close_fcn_t 118 #define d_read_t read_write_fcn_t 119 #define d_write_t read_write_fcn_t 120 #define d_ioctl_t ioctl_fcn_t 121 #define d_stop_t stop_fcn_t 122 #define d_reset_t reset_fcn_t 123 #define d_select_t select_fcn_t 124 #define d_mmap_t mmap_fcn_t 125 #define d_strategy_t strategy_fcn_t 126 127 __BEGIN_DECLS 128 int enodev(void); 129 void enodev_strat(void); 130 __END_DECLS 131 132 /* 133 * Versions of enodev() pointer, cast to appropriate function type. For use 134 * in empty devsw slots. 135 */ 136 #define eno_opcl ((open_close_fcn_t *)&enodev) 137 #define eno_strat ((strategy_fcn_t *)&enodev_strat) 138 #define eno_ioctl ((ioctl_fcn_t *)&enodev) 139 #define eno_dump ((dump_fcn_t *)&enodev) 140 #define eno_psize ((psize_fcn_t *)&enodev) 141 #define eno_rdwrt ((read_write_fcn_t *)&enodev) 142 #define eno_stop ((stop_fcn_t *)&enodev) 143 #define eno_reset ((reset_fcn_t *)&enodev) 144 #define eno_mmap ((mmap_fcn_t *)&enodev) 145 #define eno_select ((select_fcn_t *)&enodev) 146 147 /* For source backward compatibility only! */ 148 #define eno_getc ((rsvd_fcn_t *)&enodev) 149 #define eno_putc ((rsvd_fcn_t *)&enodev) 150 151 /* 152 * Block device switch table 153 */ 154 struct bdevsw { 155 open_close_fcn_t *d_open; 156 open_close_fcn_t *d_close; 157 strategy_fcn_t *d_strategy; 158 ioctl_fcn_t *d_ioctl; 159 dump_fcn_t *d_dump; 160 psize_fcn_t *d_psize; 161 int d_type; 162 }; 163 164 165 d_devtotty_t nodevtotty; 166 d_write_t nowrite; 167 168 #ifdef KERNEL_PRIVATE 169 extern struct bdevsw bdevsw[]; 170 extern int (*bootcache_contains_block)(dev_t device, u_int64_t blkno); 171 #endif /* KERNEL_PRIVATE */ 172 173 /* 174 * Contents of empty bdevsw slot. 175 */ 176 #define NO_BDEVICE \ 177 { eno_opcl, eno_opcl, eno_strat, eno_ioctl, \ 178 eno_dump, eno_psize, 0 } 179 180 181 /* 182 * Character device switch table 183 */ 184 struct cdevsw { 185 open_close_fcn_t *d_open; 186 open_close_fcn_t *d_close; 187 read_write_fcn_t *d_read; 188 read_write_fcn_t *d_write; 189 ioctl_fcn_t *d_ioctl; 190 stop_fcn_t *d_stop; 191 reset_fcn_t *d_reset; 192 struct tty **d_ttys; 193 select_fcn_t *d_select; 194 mmap_fcn_t *d_mmap; 195 strategy_fcn_t *d_strategy; 196 rsvd_fcn_t *d_reserved_1; 197 rsvd_fcn_t *d_reserved_2; 198 int d_type; 199 }; 200 201 #ifdef BSD_KERNEL_PRIVATE 202 203 extern uint64_t cdevsw_flags[]; 204 #define CDEVSW_SELECT_KQUEUE 0x01 205 #define CDEVSW_USE_OFFSET 0x02 206 #define CDEVSW_IS_PTC 0x04 207 #define CDEVSW_IS_PTS 0x08 208 209 struct thread; 210 #endif /* BSD_KERNEL_PRIVATE */ 211 212 213 /* 214 * Contents of empty cdevsw slot. 215 */ 216 217 #define NO_CDEVICE \ 218 { \ 219 eno_opcl, eno_opcl, eno_rdwrt, eno_rdwrt, \ 220 eno_ioctl, eno_stop, eno_reset, 0, \ 221 (select_fcn_t *)seltrue, eno_mmap, eno_strat, eno_getc, \ 222 eno_putc, 0 \ 223 } 224 225 #endif /* KERNEL */ 226 227 #ifdef KERNEL_PRIVATE 228 typedef int l_open_t (dev_t dev, struct tty *tp); 229 typedef int l_close_t(struct tty *tp, int flags); 230 typedef int l_read_t (struct tty *tp, struct uio *uio, int flag); 231 typedef int l_write_t(struct tty *tp, struct uio *uio, int flag); 232 typedef int l_ioctl_t(struct tty *tp, u_long cmd, caddr_t data, int flag, 233 struct proc *p); 234 typedef int l_rint_t (int c, struct tty *tp); 235 typedef void l_start_t(struct tty *tp); 236 typedef int l_modem_t(struct tty *tp, int flag); 237 238 /* 239 * Line discipline switch table 240 */ 241 struct linesw { 242 l_open_t *l_open; 243 l_close_t *l_close; 244 l_read_t *l_read; 245 l_write_t *l_write; 246 l_ioctl_t *l_ioctl; 247 l_rint_t *l_rint; 248 l_start_t *l_start; 249 l_modem_t *l_modem; 250 }; 251 252 253 extern struct linesw linesw[]; 254 extern const int nlinesw; 255 256 int ldisc_register(int, struct linesw *); 257 void ldisc_deregister(int); 258 #define LDISC_LOAD -1 /* Loadable line discipline */ 259 260 #endif /* KERNEL_PRIVATE */ 261 262 #ifdef BSD_KERNEL_PRIVATE 263 /* 264 * Swap device table 265 */ 266 struct swdevt { 267 dev_t sw_dev; 268 int sw_flags; 269 int sw_nblks; 270 struct vnode *sw_vp; 271 }; 272 #define SW_FREED 0x01 273 #define SW_SEQUENTIAL 0x02 274 #define sw_freed sw_flags /* XXX compat */ 275 276 extern struct swdevt swdevt[]; 277 278 #endif /* BSD_KERNEL_PRIVATE */ 279 280 281 #ifdef KERNEL 282 /* 283 * ***_free finds free slot; 284 * ***_add adds entries to the devsw table 285 * If int arg is -1; finds a free slot 286 * Returns the major number if successful 287 * else -1 288 */ 289 __BEGIN_DECLS 290 #ifdef KERNEL_PRIVATE 291 extern struct cdevsw cdevsw[]; 292 extern int cdevsw_setkqueueok(int, const struct cdevsw*, int); 293 #endif /* KERNEL_PRIVATE */ 294 295 #ifdef BSD_KERNEL_PRIVATE 296 extern void devsw_lock(dev_t, int); 297 extern void devsw_unlock(dev_t, int); 298 #endif /* BSD_KERNEL_PRIVATE */ 299 300 int bdevsw_isfree(int); 301 int bdevsw_add(int, const struct bdevsw *); 302 int bdevsw_remove(int, const struct bdevsw *); 303 int cdevsw_isfree(int); 304 int cdevsw_add(int, const struct cdevsw *); 305 int cdevsw_add_with_bdev(int index, const struct cdevsw * csw, int bdev); 306 int cdevsw_remove(int, const struct cdevsw *); 307 int isdisk(dev_t, int); 308 __END_DECLS 309 #endif /* KERNEL */ 310 311 #endif /* _SYS_CONF_H_ */ 312