1 /*- 2 * Copyright (C) 2003,2004 3 * Hidetoshi Shimokawa. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * 16 * This product includes software developed by Hidetoshi Shimokawa. 17 * 18 * 4. Neither the name of the author nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * $FreeBSD$ 35 */ 36 37 #include <sys/param.h> 38 #if __FreeBSD_version >= 502122 39 #include <sys/kdb.h> 40 #include <gdb/gdb.h> 41 #endif 42 #include <sys/kernel.h> 43 #include <sys/module.h> 44 #include <sys/systm.h> 45 #include <sys/types.h> 46 #include <sys/conf.h> 47 #include <sys/cons.h> 48 #include <sys/consio.h> 49 #include <sys/tty.h> 50 #include <sys/malloc.h> 51 #include <sys/priv.h> 52 #include <sys/proc.h> 53 #include <sys/ucred.h> 54 55 #include <machine/bus.h> 56 57 #ifdef __DragonFly__ 58 #include "dcons.h" 59 #include "dcons_os.h" 60 #else 61 #include <dev/dcons/dcons.h> 62 #include <dev/dcons/dcons_os.h> 63 #endif 64 65 #include <ddb/ddb.h> 66 #include <sys/reboot.h> 67 68 #include <sys/sysctl.h> 69 70 #include <vm/vm.h> 71 #include <vm/vm_param.h> 72 #include <vm/pmap.h> 73 74 #include "opt_comconsole.h" 75 #include "opt_dcons.h" 76 #include "opt_kdb.h" 77 #include "opt_gdb.h" 78 #include "opt_ddb.h" 79 80 81 #ifndef DCONS_POLL_HZ 82 #define DCONS_POLL_HZ 100 83 #endif 84 85 #ifndef DCONS_BUF_SIZE 86 #define DCONS_BUF_SIZE (16*1024) 87 #endif 88 89 #ifndef DCONS_FORCE_CONSOLE 90 #define DCONS_FORCE_CONSOLE 0 /* Mostly for FreeBSD-4/DragonFly */ 91 #endif 92 93 #ifndef DCONS_FORCE_GDB 94 #define DCONS_FORCE_GDB 1 95 #endif 96 97 #if __FreeBSD_version >= 500101 98 #define CONS_NODEV 1 99 #if __FreeBSD_version < 502122 100 static struct consdev gdbconsdev; 101 #endif 102 #endif 103 104 static d_open_t dcons_open; 105 static d_close_t dcons_close; 106 #if defined(__DragonFly__) || __FreeBSD_version < 500104 107 static d_ioctl_t dcons_ioctl; 108 #endif 109 110 static struct cdevsw dcons_cdevsw = { 111 #ifdef __DragonFly__ 112 #define CDEV_MAJOR 184 113 "dcons", CDEV_MAJOR, D_TTY, NULL, 0, 114 dcons_open, dcons_close, ttyread, ttywrite, dcons_ioctl, 115 ttypoll, nommap, nostrategy, nodump, nopsize, 116 #elif __FreeBSD_version >= 500104 117 .d_version = D_VERSION, 118 .d_open = dcons_open, 119 .d_close = dcons_close, 120 .d_name = "dcons", 121 .d_flags = D_TTY | D_NEEDGIANT, 122 #else 123 #define CDEV_MAJOR 184 124 /* open */ dcons_open, 125 /* close */ dcons_close, 126 /* read */ ttyread, 127 /* write */ ttywrite, 128 /* ioctl */ dcons_ioctl, 129 /* poll */ ttypoll, 130 /* mmap */ nommap, 131 /* strategy */ nostrategy, 132 /* name */ "dcons", 133 /* major */ CDEV_MAJOR, 134 /* dump */ nodump, 135 /* psize */ nopsize, 136 /* flags */ D_TTY, 137 #endif 138 }; 139 140 #ifndef KLD_MODULE 141 static char bssbuf[DCONS_BUF_SIZE]; /* buf in bss */ 142 #endif 143 144 /* global data */ 145 static struct dcons_global dg; 146 struct dcons_global *dcons_conf; 147 static int poll_hz = DCONS_POLL_HZ; 148 149 static struct dcons_softc sc[DCONS_NPORT]; 150 151 SYSCTL_NODE(_kern, OID_AUTO, dcons, CTLFLAG_RD, 0, "Dumb Console"); 152 SYSCTL_INT(_kern_dcons, OID_AUTO, poll_hz, CTLFLAG_RW, &poll_hz, 0, 153 "dcons polling rate"); 154 155 static int drv_init = 0; 156 static struct callout dcons_callout; 157 struct dcons_buf *dcons_buf; /* for local dconschat */ 158 159 #ifdef __DragonFly__ 160 #define DEV dev_t 161 #define THREAD d_thread_t 162 #elif __FreeBSD_version < 500000 163 #define DEV dev_t 164 #define THREAD struct proc 165 #else 166 #define DEV struct cdev * 167 #define THREAD struct thread 168 #endif 169 170 171 static void dcons_tty_start(struct tty *); 172 static int dcons_tty_param(struct tty *, struct termios *); 173 static void dcons_timeout(void *); 174 static int dcons_drv_init(int); 175 176 static cn_probe_t dcons_cnprobe; 177 static cn_init_t dcons_cninit; 178 static cn_term_t dcons_cnterm; 179 static cn_getc_t dcons_cngetc; 180 static cn_putc_t dcons_cnputc; 181 182 CONSOLE_DRIVER(dcons); 183 184 #if defined(GDB) && (__FreeBSD_version >= 502122) 185 static gdb_probe_f dcons_dbg_probe; 186 static gdb_init_f dcons_dbg_init; 187 static gdb_term_f dcons_dbg_term; 188 static gdb_getc_f dcons_dbg_getc; 189 static gdb_putc_f dcons_dbg_putc; 190 191 GDB_DBGPORT(dcons, dcons_dbg_probe, dcons_dbg_init, dcons_dbg_term, 192 dcons_dbg_getc, dcons_dbg_putc); 193 194 extern struct gdb_dbgport *gdb_cur; 195 #endif 196 197 #if (defined(GDB) || defined(DDB)) && defined(ALT_BREAK_TO_DEBUGGER) 198 static int 199 dcons_check_break(struct dcons_softc *dc, int c) 200 { 201 if (c < 0) 202 return (c); 203 204 #if __FreeBSD_version >= 502122 205 if (kdb_alt_break(c, &dc->brk_state)) { 206 if ((dc->flags & DC_GDB) != 0) { 207 #ifdef GDB 208 if (gdb_cur == &dcons_gdb_dbgport) { 209 kdb_dbbe_select("gdb"); 210 kdb_enter(KDB_WHY_BREAK, 211 "Break sequence on dcons gdb port"); 212 } 213 #endif 214 } else 215 kdb_enter(KDB_WHY_BREAK, 216 "Break sequence on dcons console port"); 217 } 218 #else 219 switch (dc->brk_state) { 220 case STATE1: 221 if (c == KEY_TILDE) 222 dc->brk_state = STATE2; 223 else 224 dc->brk_state = STATE0; 225 break; 226 case STATE2: 227 dc->brk_state = STATE0; 228 if (c == KEY_CTRLB) { 229 #if DCONS_FORCE_GDB 230 if (dc->flags & DC_GDB) 231 boothowto |= RB_GDB; 232 #endif 233 breakpoint(); 234 } 235 } 236 if (c == KEY_CR) 237 dc->brk_state = STATE1; 238 #endif 239 return (c); 240 } 241 #else 242 #define dcons_check_break(dc, c) (c) 243 #endif 244 245 static int 246 dcons_os_checkc_nopoll(struct dcons_softc *dc) 247 { 248 int c; 249 250 if (dg.dma_tag != NULL) 251 bus_dmamap_sync(dg.dma_tag, dg.dma_map, BUS_DMASYNC_POSTREAD); 252 253 c = dcons_check_break(dc, dcons_checkc(dc)); 254 255 if (dg.dma_tag != NULL) 256 bus_dmamap_sync(dg.dma_tag, dg.dma_map, BUS_DMASYNC_PREREAD); 257 258 return (c); 259 } 260 261 static int 262 dcons_os_checkc(struct dcons_softc *dc) 263 { 264 EVENTHANDLER_INVOKE(dcons_poll, 0); 265 return (dcons_os_checkc_nopoll(dc)); 266 } 267 268 #if defined(GDB) || !defined(CONS_NODEV) 269 static int 270 dcons_os_getc(struct dcons_softc *dc) 271 { 272 int c; 273 274 while ((c = dcons_os_checkc(dc)) == -1); 275 276 return (c & 0xff); 277 } 278 #endif 279 280 static void 281 dcons_os_putc(struct dcons_softc *dc, int c) 282 { 283 if (dg.dma_tag != NULL) 284 bus_dmamap_sync(dg.dma_tag, dg.dma_map, BUS_DMASYNC_POSTWRITE); 285 286 dcons_putc(dc, c); 287 288 if (dg.dma_tag != NULL) 289 bus_dmamap_sync(dg.dma_tag, dg.dma_map, BUS_DMASYNC_PREWRITE); 290 } 291 static int 292 dcons_open(DEV dev, int flag, int mode, THREAD *td) 293 { 294 struct tty *tp; 295 int unit, error, s; 296 297 unit = minor(dev); 298 if (unit != 0) 299 return (ENXIO); 300 301 tp = dev->si_tty; 302 tp->t_oproc = dcons_tty_start; 303 tp->t_param = dcons_tty_param; 304 tp->t_stop = nottystop; 305 tp->t_dev = dev; 306 307 error = 0; 308 309 s = spltty(); 310 if ((tp->t_state & TS_ISOPEN) == 0) { 311 tp->t_state |= TS_CARR_ON; 312 ttyconsolemode(tp, 0); 313 } else if ((tp->t_state & TS_XCLUDE) && 314 priv_check(td, PRIV_TTY_EXCLUSIVE)) { 315 splx(s); 316 return (EBUSY); 317 } 318 splx(s); 319 320 #if __FreeBSD_version < 502113 321 error = (*linesw[tp->t_line].l_open)(dev, tp); 322 #else 323 error = ttyld_open(tp, dev); 324 #endif 325 326 return (error); 327 } 328 329 static int 330 dcons_close(DEV dev, int flag, int mode, THREAD *td) 331 { 332 int unit; 333 struct tty *tp; 334 335 unit = minor(dev); 336 if (unit != 0) 337 return (ENXIO); 338 339 tp = dev->si_tty; 340 if (tp->t_state & TS_ISOPEN) { 341 #if __FreeBSD_version < 502113 342 (*linesw[tp->t_line].l_close)(tp, flag); 343 ttyclose(tp); 344 #else 345 ttyld_close(tp, flag); 346 tty_close(tp); 347 #endif 348 } 349 350 return (0); 351 } 352 353 #if defined(__DragonFly__) || __FreeBSD_version < 500104 354 static int 355 dcons_ioctl(DEV dev, u_long cmd, caddr_t data, int flag, THREAD *td) 356 { 357 int unit; 358 struct tty *tp; 359 int error; 360 361 unit = minor(dev); 362 if (unit != 0) 363 return (ENXIO); 364 365 tp = dev->si_tty; 366 error = (*linesw[tp->t_line].l_ioctl)(tp, cmd, data, flag, td); 367 if (error != ENOIOCTL) 368 return (error); 369 370 error = ttioctl(tp, cmd, data, flag); 371 if (error != ENOIOCTL) 372 return (error); 373 374 return (ENOTTY); 375 } 376 #endif 377 378 static int 379 dcons_tty_param(struct tty *tp, struct termios *t) 380 { 381 tp->t_ispeed = t->c_ispeed; 382 tp->t_ospeed = t->c_ospeed; 383 tp->t_cflag = t->c_cflag; 384 return 0; 385 } 386 387 static void 388 dcons_tty_start(struct tty *tp) 389 { 390 struct dcons_softc *dc; 391 int s; 392 393 dc = (struct dcons_softc *)tp->t_dev->si_drv1; 394 s = spltty(); 395 if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) { 396 ttwwakeup(tp); 397 return; 398 } 399 400 tp->t_state |= TS_BUSY; 401 while (tp->t_outq.c_cc != 0) 402 dcons_os_putc(dc, getc(&tp->t_outq)); 403 tp->t_state &= ~TS_BUSY; 404 405 ttwwakeup(tp); 406 splx(s); 407 } 408 409 static void 410 dcons_timeout(void *v) 411 { 412 struct tty *tp; 413 struct dcons_softc *dc; 414 int i, c, polltime; 415 416 for (i = 0; i < DCONS_NPORT; i ++) { 417 dc = &sc[i]; 418 tp = ((DEV)dc->dev)->si_tty; 419 while ((c = dcons_os_checkc_nopoll(dc)) != -1) 420 if (tp->t_state & TS_ISOPEN) 421 #if __FreeBSD_version < 502113 422 (*linesw[tp->t_line].l_rint)(c, tp); 423 #else 424 ttyld_rint(tp, c); 425 #endif 426 } 427 polltime = hz / poll_hz; 428 if (polltime < 1) 429 polltime = 1; 430 callout_reset(&dcons_callout, polltime, dcons_timeout, tp); 431 } 432 433 static void 434 dcons_cnprobe(struct consdev *cp) 435 { 436 #ifdef __DragonFly__ 437 cp->cn_dev = make_dev(&dcons_cdevsw, DCONS_CON, 438 UID_ROOT, GID_WHEEL, 0600, "dcons"); 439 #elif __FreeBSD_version >= 501109 440 sprintf(cp->cn_name, "dcons"); 441 #else 442 cp->cn_dev = makedev(CDEV_MAJOR, DCONS_CON); 443 #endif 444 #if DCONS_FORCE_CONSOLE 445 cp->cn_pri = CN_REMOTE; 446 #else 447 cp->cn_pri = CN_NORMAL; 448 #endif 449 } 450 451 static void 452 dcons_cninit(struct consdev *cp) 453 { 454 dcons_drv_init(0); 455 #if CONS_NODEV 456 cp->cn_arg 457 #else 458 cp->cn_dev->si_drv1 459 #endif 460 = (void *)&sc[DCONS_CON]; /* share port0 with unit0 */ 461 } 462 463 static void 464 dcons_cnterm(struct consdev *cp) 465 { 466 } 467 468 #if CONS_NODEV 469 static int 470 dcons_cngetc(struct consdev *cp) 471 { 472 struct dcons_softc *dc = (struct dcons_softc *)cp->cn_arg; 473 return (dcons_os_checkc(dc)); 474 } 475 static void 476 dcons_cnputc(struct consdev *cp, int c) 477 { 478 struct dcons_softc *dc = (struct dcons_softc *)cp->cn_arg; 479 dcons_os_putc(dc, c); 480 } 481 #else 482 static int 483 dcons_cngetc(DEV dev) 484 { 485 struct dcons_softc *dc = (struct dcons_softc *)dev->si_drv1; 486 return (dcons_os_getc(dc)); 487 } 488 static int 489 dcons_cncheckc(DEV dev) 490 { 491 struct dcons_softc *dc = (struct dcons_softc *)dev->si_drv1; 492 return (dcons_os_checkc(dc)); 493 } 494 static void 495 dcons_cnputc(DEV dev, int c) 496 { 497 struct dcons_softc *dc = (struct dcons_softc *)dev->si_drv1; 498 dcons_os_putc(dc, c); 499 } 500 #endif 501 502 static int 503 dcons_drv_init(int stage) 504 { 505 #if defined(__i386__) || defined(__amd64__) 506 quad_t addr, size; 507 #endif 508 509 if (drv_init) 510 return(drv_init); 511 512 drv_init = -1; 513 514 bzero(&dg, sizeof(dg)); 515 dcons_conf = &dg; 516 dg.cdev = &dcons_consdev; 517 dg.buf = NULL; 518 dg.size = DCONS_BUF_SIZE; 519 520 #if defined(__i386__) || defined(__amd64__) 521 if (getenv_quad("dcons.addr", &addr) > 0 && 522 getenv_quad("dcons.size", &size) > 0) { 523 #ifdef __i386__ 524 vm_paddr_t pa; 525 /* 526 * Allow read/write access to dcons buffer. 527 */ 528 for (pa = trunc_page(addr); pa < addr + size; pa += PAGE_SIZE) 529 *vtopte(KERNBASE + pa) |= PG_RW; 530 invltlb(); 531 #endif 532 /* XXX P to V */ 533 dg.buf = (struct dcons_buf *)(vm_offset_t)(KERNBASE + addr); 534 dg.size = size; 535 if (dcons_load_buffer(dg.buf, dg.size, sc) < 0) 536 dg.buf = NULL; 537 } 538 #endif 539 if (dg.buf != NULL) 540 goto ok; 541 542 #ifndef KLD_MODULE 543 if (stage == 0) { /* XXX or cold */ 544 /* 545 * DCONS_FORCE_CONSOLE == 1 and statically linked. 546 * called from cninit(). can't use contigmalloc yet . 547 */ 548 dg.buf = (struct dcons_buf *) bssbuf; 549 dcons_init(dg.buf, dg.size, sc); 550 } else 551 #endif 552 { 553 /* 554 * DCONS_FORCE_CONSOLE == 0 or kernel module case. 555 * if the module is loaded after boot, 556 * bssbuf could be non-continuous. 557 */ 558 dg.buf = (struct dcons_buf *) contigmalloc(dg.size, 559 M_DEVBUF, 0, 0x10000, 0xffffffff, PAGE_SIZE, 0ul); 560 dcons_init(dg.buf, dg.size, sc); 561 } 562 563 ok: 564 dcons_buf = dg.buf; 565 566 #if __FreeBSD_version < 502122 567 #if defined(DDB) && DCONS_FORCE_GDB 568 #if CONS_NODEV 569 gdbconsdev.cn_arg = (void *)&sc[DCONS_GDB]; 570 #if __FreeBSD_version >= 501109 571 sprintf(gdbconsdev.cn_name, "dgdb"); 572 #endif 573 gdb_arg = &gdbconsdev; 574 #elif defined(__DragonFly__) 575 gdbdev = make_dev(&dcons_cdevsw, DCONS_GDB, 576 UID_ROOT, GID_WHEEL, 0600, "dgdb"); 577 #else 578 gdbdev = makedev(CDEV_MAJOR, DCONS_GDB); 579 #endif 580 gdb_getc = dcons_cngetc; 581 gdb_putc = dcons_cnputc; 582 #endif 583 #endif 584 drv_init = 1; 585 586 return 0; 587 } 588 589 590 static int 591 dcons_attach_port(int port, char *name, int flags) 592 { 593 struct dcons_softc *dc; 594 struct tty *tp; 595 DEV dev; 596 597 dc = &sc[port]; 598 dc->flags = flags; 599 dev = make_dev(&dcons_cdevsw, port, 600 UID_ROOT, GID_WHEEL, 0600, name); 601 dc->dev = (void *)dev; 602 tp = ttyalloc(); 603 604 dev->si_drv1 = (void *)dc; 605 dev->si_tty = tp; 606 607 tp->t_oproc = dcons_tty_start; 608 tp->t_param = dcons_tty_param; 609 tp->t_stop = nottystop; 610 tp->t_dev = dc->dev; 611 612 return(0); 613 } 614 615 static int 616 dcons_attach(void) 617 { 618 int polltime; 619 620 #ifdef __DragonFly__ 621 cdevsw_add(&dcons_cdevsw, -1, 0); 622 #endif 623 dcons_attach_port(DCONS_CON, "dcons", 0); 624 dcons_attach_port(DCONS_GDB, "dgdb", DC_GDB); 625 #if __FreeBSD_version < 500000 626 callout_init(&dcons_callout); 627 #else 628 callout_init(&dcons_callout, 0); 629 #endif 630 polltime = hz / poll_hz; 631 if (polltime < 1) 632 polltime = 1; 633 callout_reset(&dcons_callout, polltime, dcons_timeout, NULL); 634 return(0); 635 } 636 637 static int 638 dcons_detach(int port) 639 { 640 struct tty *tp; 641 struct dcons_softc *dc; 642 643 dc = &sc[port]; 644 645 tp = ((DEV)dc->dev)->si_tty; 646 647 if (tp->t_state & TS_ISOPEN) { 648 printf("dcons: still opened\n"); 649 #if __FreeBSD_version < 502113 650 (*linesw[tp->t_line].l_close)(tp, 0); 651 tp->t_gen++; 652 ttyclose(tp); 653 ttwakeup(tp); 654 ttwwakeup(tp); 655 #else 656 ttyld_close(tp, 0); 657 tty_close(tp); 658 #endif 659 } 660 /* XXX 661 * must wait until all device are closed. 662 */ 663 #ifdef __DragonFly__ 664 tsleep((void *)dc, 0, "dcodtc", hz/4); 665 #else 666 tsleep((void *)dc, PWAIT, "dcodtc", hz/4); 667 #endif 668 destroy_dev(dc->dev); 669 670 return(0); 671 } 672 673 674 /* cnXXX works only for FreeBSD-5 */ 675 static int 676 dcons_modevent(module_t mode, int type, void *data) 677 { 678 int err = 0, ret; 679 680 switch (type) { 681 case MOD_LOAD: 682 ret = dcons_drv_init(1); 683 dcons_attach(); 684 #if __FreeBSD_version >= 500000 685 if (ret == 0) { 686 dcons_cnprobe(&dcons_consdev); 687 dcons_cninit(&dcons_consdev); 688 cnadd(&dcons_consdev); 689 } 690 #endif 691 break; 692 case MOD_UNLOAD: 693 printf("dcons: unload\n"); 694 callout_stop(&dcons_callout); 695 #if __FreeBSD_version < 502122 696 #if defined(DDB) && DCONS_FORCE_GDB 697 #if CONS_NODEV 698 gdb_arg = NULL; 699 #else 700 gdbdev = NULL; 701 #endif 702 #endif 703 #endif 704 #if __FreeBSD_version >= 500000 705 cnremove(&dcons_consdev); 706 #endif 707 dcons_detach(DCONS_CON); 708 dcons_detach(DCONS_GDB); 709 dg.buf->magic = 0; 710 711 contigfree(dg.buf, DCONS_BUF_SIZE, M_DEVBUF); 712 713 break; 714 case MOD_SHUTDOWN: 715 #if 0 /* Keep connection after halt */ 716 dg.buf->magic = 0; 717 #endif 718 break; 719 default: 720 err = EOPNOTSUPP; 721 break; 722 } 723 return(err); 724 } 725 726 #if defined(GDB) && (__FreeBSD_version >= 502122) 727 /* Debugger interface */ 728 729 static int 730 dcons_dbg_probe(void) 731 { 732 int dcons_gdb; 733 734 if (getenv_int("dcons_gdb", &dcons_gdb) == 0) 735 return (-1); 736 return (dcons_gdb); 737 } 738 739 static void 740 dcons_dbg_init(void) 741 { 742 } 743 744 static void 745 dcons_dbg_term(void) 746 { 747 } 748 749 static void 750 dcons_dbg_putc(int c) 751 { 752 struct dcons_softc *dc = &sc[DCONS_GDB]; 753 dcons_os_putc(dc, c); 754 } 755 756 static int 757 dcons_dbg_getc(void) 758 { 759 struct dcons_softc *dc = &sc[DCONS_GDB]; 760 return (dcons_os_getc(dc)); 761 } 762 #endif 763 764 DEV_MODULE(dcons, dcons_modevent, NULL); 765 MODULE_VERSION(dcons, DCONS_VERSION); 766