X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/378393581903b274cb7a4d18e0d978071a6b592d..c3c9b80d004dbbfdf763edeb97968c6997e3b45b:/bsd/dev/i386/conf.c diff --git a/bsd/dev/i386/conf.c b/bsd/dev/i386/conf.c index 0e5ea99b4..b2ad22676 100644 --- a/bsd/dev/i386/conf.c +++ b/bsd/dev/i386/conf.c @@ -1,26 +1,31 @@ /* - * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. + * Copyright (c) 1997-2020 Apple Inc. All rights reserved. * - * @APPLE_LICENSE_HEADER_START@ - * - * The contents of this file constitute Original Code as defined in and - * are subject to the Apple Public Source License Version 1.1 (the - * "License"). You may not use this file except in compliance with the - * License. Please obtain a copy of the License at - * http://www.apple.com/publicsource and read it before using this file. - * - * This Original Code and all software distributed under the License are - * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER + * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ + * + * This file contains Original Code and/or Modifications of Original Code + * as defined in and that are subject to the Apple Public Source License + * Version 2.0 (the 'License'). You may not use this file except in + * compliance with the License. The rights granted to you under the License + * may not be used to create, or enable the creation or redistribution of, + * unlawful or unlicensed copies of an Apple operating system, or to + * circumvent, violate, or enable the circumvention or violation of, any + * terms of an Apple operating system software license agreement. + * + * Please obtain a copy of the License at + * http://www.opensource.apple.com/apsl/ and read it before using this file. + * + * The Original Code and all software distributed under the License are + * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the - * License for the specific language governing rights and limitations - * under the License. - * - * @APPLE_LICENSE_HEADER_END@ + * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. + * Please see the License for the specific language governing rights and + * limitations under the License. + * + * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* - * Copyright (c) 1997 by Apple Computer, Inc., all rights reserved * Copyright (c) 1993 NeXT Computer, Inc. * * UNIX Device switch tables. @@ -28,7 +33,7 @@ * HISTORY * * 30 July 1997 Umesh Vaishampayan (umeshv@apple.com) - * enabled file descriptor pseudo-device. + * enabled file descriptor pseudo-device. * 18 June 1993 ? at NeXT * Cleaned up a lot of stuff in this file. */ @@ -40,308 +45,231 @@ #include /* Prototypes that should be elsewhere: */ -extern int isdisk(dev_t dev, int type); -extern dev_t chrtoblk(dev_t dev); -extern int chrtoblk_set(int cdev, int bdev); -extern int iskmemdev(dev_t dev); +extern dev_t chrtoblk(dev_t dev); +extern int chrtoblk_set(int cdev, int bdev); -struct bdevsw bdevsw[] = +struct bdevsw bdevsw[] = { /* - * For block devices, every other block of 8 slots is - * reserved to NeXT. The other slots are available for + * For block devices, every other block of 8 slots is + * reserved for Apple. The other slots are available for * the user. This way we can both add new entries without - * running into each other. Be sure to fill in NeXT's + * running into each other. Be sure to fill in Apple's * 8 reserved slots when you jump over us -- we'll do the * same for you. */ - /* 0 - 7 are reserved to NeXT */ + /* 0 - 7 are reserved for Apple */ - NO_BDEVICE, /* 0*/ - NO_BDEVICE, /* 1*/ - NO_BDEVICE, /* 2*/ - NO_BDEVICE, /* 3*/ - NO_BDEVICE, /* 4*/ - NO_BDEVICE, /* 5*/ - NO_BDEVICE, /* 6*/ - NO_BDEVICE, /* 7*/ + NO_BDEVICE, /* 0*/ + NO_BDEVICE, /* 1*/ + NO_BDEVICE, /* 2*/ + NO_BDEVICE, /* 3*/ + NO_BDEVICE, /* 4*/ + NO_BDEVICE, /* 5*/ + NO_BDEVICE, /* 6*/ + NO_BDEVICE, /* 7*/ /* 8 - 15 are reserved to the user */ - NO_BDEVICE, /* 8*/ - NO_BDEVICE, /* 9*/ - NO_BDEVICE, /*10*/ - NO_BDEVICE, /*11*/ - NO_BDEVICE, /*12*/ - NO_BDEVICE, /*13*/ - NO_BDEVICE, /*14*/ - NO_BDEVICE, /*15*/ + NO_BDEVICE, /* 8*/ + NO_BDEVICE, /* 9*/ + NO_BDEVICE, /*10*/ + NO_BDEVICE, /*11*/ + NO_BDEVICE, /*12*/ + NO_BDEVICE, /*13*/ + NO_BDEVICE, /*14*/ + NO_BDEVICE, /*15*/ - /* 16 - 23 are reserved to NeXT */ - NO_BDEVICE, /*16*/ - NO_BDEVICE, /*17*/ - NO_BDEVICE, /*18*/ - NO_BDEVICE, /*18*/ - NO_BDEVICE, /*20*/ - NO_BDEVICE, /*21*/ - NO_BDEVICE, /*22*/ - NO_BDEVICE, /*23*/ + /* 16 - 23 are reserved for Apple */ + NO_BDEVICE, /*16*/ + NO_BDEVICE, /*17*/ + NO_BDEVICE, /*18*/ + NO_BDEVICE, /*18*/ + NO_BDEVICE, /*20*/ + NO_BDEVICE, /*21*/ + NO_BDEVICE, /*22*/ + NO_BDEVICE, /*23*/ }; -int nblkdev = sizeof (bdevsw) / sizeof (bdevsw[0]); +const int nblkdev = sizeof(bdevsw) / sizeof(bdevsw[0]); extern struct tty *km_tty[]; -extern d_open_t cnopen; -extern d_close_t cnclose; -extern d_read_t cnread; -extern d_write_t cnwrite; -extern d_ioctl_t cnioctl; -extern d_select_t cnselect; -extern d_getc_t cngetc; -extern d_putc_t cnputc; -extern d_open_t kmopen; -extern d_close_t kmclose; -extern d_read_t kmread; -extern d_write_t kmwrite; -extern d_ioctl_t kmioctl; -extern d_getc_t kmgetc; -extern d_putc_t kmputc; -extern d_open_t sgopen; -extern d_close_t sgclose; -extern d_ioctl_t sgioctl; +extern d_open_t cnopen; +extern d_close_t cnclose; +extern d_read_t cnread; +extern d_write_t cnwrite; +extern d_ioctl_t cnioctl; +extern d_select_t cnselect; +extern d_open_t kmopen; +extern d_close_t kmclose; +extern d_read_t kmread; +extern d_write_t kmwrite; +extern d_ioctl_t kmioctl; +extern d_open_t sgopen; +extern d_close_t sgclose; +extern d_ioctl_t sgioctl; #if NVOL > 0 -extern d_open_t volopen; -extern d_close_t volclose; -extern d_ioctl_t volioctl; +extern d_open_t volopen; +extern d_close_t volclose; +extern d_ioctl_t volioctl; #else -#define volopen eno_opcl -#define volclose eno_opcl -#define volioctl eno_ioctl +#define volopen eno_opcl +#define volclose eno_opcl +#define volioctl eno_ioctl #endif -extern d_open_t cttyopen; -extern d_read_t cttyread; -extern d_write_t cttywrite; -extern d_ioctl_t cttyioctl; -extern d_select_t cttyselect; +extern d_open_t cttyopen; +extern d_read_t cttyread; +extern d_write_t cttywrite; +extern d_ioctl_t cttyioctl; +extern d_select_t cttyselect; -extern d_read_t mmread; -extern d_write_t mmwrite; -extern d_ioctl_t mmioctl; -#define mmselect (select_fcn_t *)seltrue -#define mmmmap eno_mmap +extern d_read_t mmread; +extern d_write_t mmwrite; +extern d_ioctl_t mmioctl; +#define mmselect (select_fcn_t *)seltrue +#define mmmmap eno_mmap #include #if NPTY > 0 -extern struct tty *pt_tty[]; -extern d_open_t ptsopen; -extern d_close_t ptsclose; -extern d_read_t ptsread; -extern d_write_t ptswrite; -extern d_stop_t ptsstop; -extern d_putc_t ptsputc; -extern d_open_t ptcopen; -extern d_close_t ptcclose; -extern d_read_t ptcread; -extern d_write_t ptcwrite; -extern d_select_t ptcselect; -extern d_ioctl_t ptyioctl; +extern d_open_t ptsopen; +extern d_close_t ptsclose; +extern d_read_t ptsread; +extern d_write_t ptswrite; +extern d_stop_t ptsstop; +extern d_select_t ptsselect; +extern d_open_t ptcopen; +extern d_close_t ptcclose; +extern d_read_t ptcread; +extern d_write_t ptcwrite; +extern d_select_t ptcselect; +extern d_ioctl_t ptyioctl; #else -#define ptsopen eno_opcl -#define ptsclose eno_opcl -#define ptsread eno_rdwrt -#define ptswrite eno_rdwrt -#define ptsstop nulldev -#define ptsputc nulldev +#define ptsopen eno_opcl +#define ptsclose eno_opcl +#define ptsread eno_rdwrt +#define ptswrite eno_rdwrt +#define ptsstop nulldev -#define ptcopen eno_opcl -#define ptcclose eno_opcl -#define ptcread eno_rdwrt -#define ptcwrite eno_rdwrt -#define ptcselect eno_select -#define ptyioctl eno_ioctl +#define ptcopen eno_opcl +#define ptcclose eno_opcl +#define ptcread eno_rdwrt +#define ptcwrite eno_rdwrt +#define ptcselect eno_select +#define ptyioctl eno_ioctl #endif -extern d_open_t logopen; -extern d_close_t logclose; -extern d_read_t logread; -extern d_ioctl_t logioctl; -extern d_select_t logselect; -extern d_open_t fdesc_open; -extern d_read_t fdesc_read; -extern d_write_t fdesc_write; -extern d_ioctl_t fdesc_ioctl; -extern d_select_t fdesc_select; +extern d_open_t logopen; +extern d_close_t logclose; +extern d_read_t logread; +extern d_ioctl_t logioctl; +extern d_select_t logselect; -#define nullopen (d_open_t *)&nulldev -#define nullclose (d_close_t *)&nulldev -#define nullread (d_read_t *)&nulldev -#define nullwrite (d_write_t *)&nulldev -#define nullioctl (d_ioctl_t *)&nulldev -#define nullselect (d_select_t *)&nulldev -#define nullstop (d_stop_t *)&nulldev -#define nullreset (d_reset_t *)&nulldev +extern d_open_t oslog_streamopen; +extern d_close_t oslog_streamclose; +extern d_read_t oslog_streamread; +extern d_ioctl_t oslog_streamioctl; +extern d_select_t oslog_streamselect; -struct cdevsw cdevsw[] = -{ - /* - * For character devices, every other block of 16 slots is - * reserved to NeXT. The other slots are available for - * the user. This way we can both add new entries without - * running into each other. Be sure to fill in NeXT's - * 16 reserved slots when you jump over us -- we'll do the - * same for you. - */ - - /* 0 - 15 are reserved to NeXT */ +extern d_open_t oslogopen; +extern d_close_t oslogclose; +extern d_select_t oslogselect; +extern d_ioctl_t oslogioctl; - { - cnopen, cnclose, cnread, cnwrite, /* 0*/ - cnioctl, nullstop, nullreset, 0, cnselect, - eno_mmap, eno_strat, cngetc, cnputc, D_TTY - }, - NO_CDEVICE, /* 1*/ - { - cttyopen, nullclose, cttyread, cttywrite, /* 2*/ - cttyioctl, nullstop, nullreset, 0, cttyselect, - eno_mmap, eno_strat, eno_getc, eno_putc, D_TTY - }, - { - nullopen, nullclose, mmread, mmwrite, /* 3*/ - mmioctl, nullstop, nullreset, 0, mmselect, - mmmmap, eno_strat, eno_getc, eno_putc, D_DISK - }, - { - ptsopen, ptsclose, ptsread, ptswrite, /* 4*/ - ptyioctl, ptsstop, nullreset, pt_tty, ttselect, - eno_mmap, eno_strat, eno_getc, eno_putc, D_TTY - }, - { - ptcopen, ptcclose, ptcread, ptcwrite, /* 5*/ - ptyioctl, nullstop, nullreset, 0, ptcselect, - eno_mmap, eno_strat, eno_getc, eno_putc, D_TTY - }, - { - logopen, logclose, logread, eno_rdwrt, /* 6*/ - logioctl, eno_stop, nullreset, 0, logselect, - eno_mmap, eno_strat, eno_getc, eno_putc, 0 - }, - NO_CDEVICE, /* 7*/ - NO_CDEVICE, /* 8*/ - NO_CDEVICE, /* 9*/ - NO_CDEVICE, /*10*/ - NO_CDEVICE, /*11*/ - { - kmopen, kmclose, kmread, kmwrite, /*12*/ - kmioctl, nullstop, nullreset, km_tty, ttselect, - eno_mmap, eno_strat, kmgetc, kmputc, 0 - }, - NO_CDEVICE, /*13*/ - NO_CDEVICE, /*14*/ - NO_CDEVICE, /*15*/ +#define nullopen (d_open_t *)&nulldev +#define nullclose (d_close_t *)&nulldev +#define nullread (d_read_t *)&nulldev +#define nullwrite (d_write_t *)&nulldev +#define nullioctl (d_ioctl_t *)&nulldev +#define nullselect (d_select_t *)&nulldev +#define nullstop (d_stop_t *)&nulldev +#define nullreset (d_reset_t *)&nulldev - /* 16 - 31 are reserved to the user */ - NO_CDEVICE, /*16*/ - NO_CDEVICE, /*17*/ - NO_CDEVICE, /*18*/ - NO_CDEVICE, /*19*/ - NO_CDEVICE, /*20*/ - NO_CDEVICE, /*21*/ - NO_CDEVICE, /*22*/ - NO_CDEVICE, /*23*/ - NO_CDEVICE, /*24*/ - NO_CDEVICE, /*25*/ - NO_CDEVICE, /*26*/ - NO_CDEVICE, /*27*/ - NO_CDEVICE, /*28*/ - NO_CDEVICE, /*29*/ - NO_CDEVICE, /*30*/ - NO_CDEVICE, /*31*/ +struct cdevsw cdevsw[] = { + /* + * To add character devices to this table dynamically, use cdevsw_add. + */ - /* 32 - 47 are reserved to NeXT */ - { - fdesc_open, eno_opcl, fdesc_read, fdesc_write, /*32*/ - fdesc_ioctl, eno_stop, eno_reset, 0, fdesc_select, - eno_mmap, eno_strat, eno_getc, eno_putc, 0 - }, -#if 1 - NO_CDEVICE, -#else - { - sgopen, sgclose, eno_rdwrt, eno_rdwrt, /*33*/ - sgioctl, eno_stop, eno_reset, 0, eno_select, - eno_mmap, eno_strat, eno_getc, eno_putc, D_TAPE - }, -#endif - NO_CDEVICE, /*34*/ - NO_CDEVICE, /*35*/ - NO_CDEVICE, /*36*/ - NO_CDEVICE, /*37*/ - NO_CDEVICE, /*38*/ - NO_CDEVICE, /*39*/ - NO_CDEVICE, /*40*/ - NO_CDEVICE, /*41*/ - { - volopen, volclose, eno_rdwrt, eno_rdwrt, /*42*/ - volioctl, eno_stop, eno_reset, 0, (select_fcn_t *)seltrue, - eno_mmap, eno_strat, eno_getc, eno_putc, 0 - }, + [0] = { + cnopen, cnclose, cnread, cnwrite, + cnioctl, nullstop, nullreset, 0, cnselect, + eno_mmap, eno_strat, eno_getc, eno_putc, D_TTY + }, + [1] = NO_CDEVICE, + [2] = { + cttyopen, nullclose, cttyread, cttywrite, + cttyioctl, nullstop, nullreset, 0, cttyselect, + eno_mmap, eno_strat, eno_getc, eno_putc, D_TTY + }, + [3] = { + nullopen, nullclose, mmread, mmwrite, + mmioctl, nullstop, nullreset, 0, mmselect, + mmmmap, eno_strat, eno_getc, eno_putc, D_DISK + }, + [PTC_MAJOR] = { + ptsopen, ptsclose, ptsread, ptswrite, + ptyioctl, ptsstop, nullreset, 0, ptsselect, + eno_mmap, eno_strat, eno_getc, eno_putc, D_TTY + }, + [PTS_MAJOR] = { + ptcopen, ptcclose, ptcread, ptcwrite, + ptyioctl, nullstop, nullreset, 0, ptcselect, + eno_mmap, eno_strat, eno_getc, eno_putc, D_TTY + }, + [6] = { + logopen, logclose, logread, eno_rdwrt, + logioctl, eno_stop, nullreset, 0, logselect, + eno_mmap, eno_strat, eno_getc, eno_putc, 0 + }, + [7] = { + oslogopen, oslogclose, eno_rdwrt, eno_rdwrt, + oslogioctl, eno_stop, nullreset, 0, oslogselect, + eno_mmap, eno_strat, eno_getc, eno_putc, 0 + }, + [8] = { + oslog_streamopen, oslog_streamclose, oslog_streamread, eno_rdwrt, + oslog_streamioctl, eno_stop, nullreset, 0, oslog_streamselect, + eno_mmap, eno_strat, eno_getc, eno_putc, 0 + }, + [9 ... 11] = NO_CDEVICE, + [12] = { + kmopen, kmclose, kmread, kmwrite, + kmioctl, nullstop, nullreset, km_tty, ttselect, + eno_mmap, eno_strat, eno_getc, eno_putc, 0 + }, + [13 ... 63] = NO_CDEVICE, }; -int nchrdev = sizeof (cdevsw) / sizeof (cdevsw[0]); +const int nchrdev = sizeof(cdevsw) / sizeof(cdevsw[0]); +uint64_t cdevsw_flags[sizeof(cdevsw) / sizeof(cdevsw[0])]; -#include /* for VCHR and VBLK */ +#include /* for VCHR and VBLK */ /* * return true if a disk */ int isdisk(dev_t dev, int type) { - dev_t maj = major(dev); + dev_t maj = major(dev); switch (type) { case VCHR: - maj = chrtoblk(maj); + maj = chrtoblk(dev); if (maj == NODEV) { break; } - /* FALL THROUGH */ + OS_FALLTHROUGH; case VBLK: if (bdevsw[maj].d_type == D_DISK) { - return (1); + return 1; } break; } - return(0); + return 0; } -static int chrtoblktab[] = { - /* CHR*/ /* BLK*/ /* CHR*/ /* BLK*/ - /* 0 */ NODEV, /* 1 */ NODEV, - /* 2 */ NODEV, /* 3 */ NODEV, - /* 4 */ NODEV, /* 5 */ NODEV, - /* 6 */ NODEV, /* 7 */ NODEV, - /* 8 */ NODEV, /* 9 */ NODEV, - /* 10 */ NODEV, /* 11 */ NODEV, - /* 12 */ NODEV, /* 13 */ NODEV, - /* 14 */ 6, /* 15 */ NODEV, - /* 16 */ NODEV, /* 17 */ NODEV, - /* 18 */ NODEV, /* 19 */ NODEV, - /* 20 */ NODEV, /* 21 */ NODEV, - /* 22 */ NODEV, /* 23 */ NODEV, - /* 24 */ NODEV, /* 25 */ NODEV, - /* 26 */ NODEV, /* 27 */ NODEV, - /* 28 */ NODEV, /* 29 */ NODEV, - /* 30 */ NODEV, /* 31 */ NODEV, - /* 32 */ NODEV, /* 33 */ NODEV, - /* 34 */ NODEV, /* 35 */ NODEV, - /* 36 */ NODEV, /* 37 */ NODEV, - /* 38 */ NODEV, /* 39 */ NODEV, - /* 40 */ NODEV, /* 41 */ 1, - /* 42 */ NODEV, /* 43 */ NODEV, - /* 44 */ NODEV, -}; +static int chrtoblktab[] = {[0 ... nchrdev] = NODEV }; /* * convert chr dev to blk dev @@ -351,29 +279,25 @@ chrtoblk(dev_t dev) { int blkmaj; - if (major(dev) >= nchrdev) - return(NODEV); + if (major(dev) >= nchrdev) { + return NODEV; + } blkmaj = chrtoblktab[major(dev)]; - if (blkmaj == NODEV) - return(NODEV); - return(makedev(blkmaj, minor(dev))); + if (blkmaj == NODEV) { + return NODEV; + } + return makedev(blkmaj, minor(dev)); } int chrtoblk_set(int cdev, int bdev) { - if (cdev >= nchrdev) - return (-1); - if (bdev != NODEV && bdev >= nblkdev) - return (-1); + if (cdev >= nchrdev) { + return -1; + } + if (bdev != NODEV && bdev >= nblkdev) { + return -1; + } chrtoblktab[cdev] = bdev; return 0; } - -/* - * Returns true if dev is /dev/mem or /dev/kmem. - */ -int iskmemdev(dev_t dev) -{ - return (major(dev) == 3 && minor(dev) < 2); -}