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: releng/7.3/sys/dev/dcons/dcons_os.c 190975 2009-04-12 19:50:46Z kan $
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_why(KDB_WHY_BREAK,
211 "Break sequence on dcons gdb port");
212 }
213 #endif
214 } else
215 kdb_enter_why(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 if (dg.buf == NULL)
561 return (-1);
562 dcons_init(dg.buf, dg.size, sc);
563 }
564
565 ok:
566 dcons_buf = dg.buf;
567
568 #if __FreeBSD_version < 502122
569 #if defined(DDB) && DCONS_FORCE_GDB
570 #if CONS_NODEV
571 gdbconsdev.cn_arg = (void *)&sc[DCONS_GDB];
572 #if __FreeBSD_version >= 501109
573 sprintf(gdbconsdev.cn_name, "dgdb");
574 #endif
575 gdb_arg = &gdbconsdev;
576 #elif defined(__DragonFly__)
577 gdbdev = make_dev(&dcons_cdevsw, DCONS_GDB,
578 UID_ROOT, GID_WHEEL, 0600, "dgdb");
579 #else
580 gdbdev = makedev(CDEV_MAJOR, DCONS_GDB);
581 #endif
582 gdb_getc = dcons_cngetc;
583 gdb_putc = dcons_cnputc;
584 #endif
585 #endif
586 drv_init = 1;
587
588 return 0;
589 }
590
591
592 static int
593 dcons_attach_port(int port, char *name, int flags)
594 {
595 struct dcons_softc *dc;
596 struct tty *tp;
597 DEV dev;
598
599 dc = &sc[port];
600 dc->flags = flags;
601 dev = make_dev(&dcons_cdevsw, port,
602 UID_ROOT, GID_WHEEL, 0600, name);
603 dc->dev = (void *)dev;
604 tp = ttyalloc();
605
606 dev->si_drv1 = (void *)dc;
607 dev->si_tty = tp;
608
609 tp->t_oproc = dcons_tty_start;
610 tp->t_param = dcons_tty_param;
611 tp->t_stop = nottystop;
612 tp->t_dev = dc->dev;
613
614 return(0);
615 }
616
617 static int
618 dcons_attach(void)
619 {
620 int polltime;
621
622 #ifdef __DragonFly__
623 cdevsw_add(&dcons_cdevsw, -1, 0);
624 #endif
625 dcons_attach_port(DCONS_CON, "dcons", 0);
626 dcons_attach_port(DCONS_GDB, "dgdb", DC_GDB);
627 #if __FreeBSD_version < 500000
628 callout_init(&dcons_callout);
629 #else
630 callout_init(&dcons_callout, 0);
631 #endif
632 polltime = hz / poll_hz;
633 if (polltime < 1)
634 polltime = 1;
635 callout_reset(&dcons_callout, polltime, dcons_timeout, NULL);
636 return(0);
637 }
638
639 static int
640 dcons_detach(int port)
641 {
642 struct tty *tp;
643 struct dcons_softc *dc;
644
645 dc = &sc[port];
646
647 tp = ((DEV)dc->dev)->si_tty;
648
649 if (tp->t_state & TS_ISOPEN) {
650 printf("dcons: still opened\n");
651 #if __FreeBSD_version < 502113
652 (*linesw[tp->t_line].l_close)(tp, 0);
653 tp->t_gen++;
654 ttyclose(tp);
655 ttwakeup(tp);
656 ttwwakeup(tp);
657 #else
658 ttyld_close(tp, 0);
659 tty_close(tp);
660 #endif
661 }
662 /* XXX
663 * must wait until all device are closed.
664 */
665 #ifdef __DragonFly__
666 tsleep((void *)dc, 0, "dcodtc", hz/4);
667 #else
668 tsleep((void *)dc, PWAIT, "dcodtc", hz/4);
669 #endif
670 destroy_dev(dc->dev);
671
672 return(0);
673 }
674
675
676 /* cnXXX works only for FreeBSD-5 */
677 static int
678 dcons_modevent(module_t mode, int type, void *data)
679 {
680 int err = 0, ret;
681
682 switch (type) {
683 case MOD_LOAD:
684 ret = dcons_drv_init(1);
685 #if __FreeBSD_version >= 500000
686 if (ret != -1)
687 dcons_attach();
688 if (ret == 0) {
689 dcons_cnprobe(&dcons_consdev);
690 dcons_cninit(&dcons_consdev);
691 cnadd(&dcons_consdev);
692 }
693 #endif
694 break;
695 case MOD_UNLOAD:
696 printf("dcons: unload\n");
697 if (drv_init == 1) {
698 callout_stop(&dcons_callout);
699 #if __FreeBSD_version < 502122
700 #if defined(DDB) && DCONS_FORCE_GDB
701 #if CONS_NODEV
702 gdb_arg = NULL;
703 #else
704 gdbdev = NULL;
705 #endif
706 #endif
707 #endif
708 #if __FreeBSD_version >= 500000
709 cnremove(&dcons_consdev);
710 #endif
711 dcons_detach(DCONS_CON);
712 dcons_detach(DCONS_GDB);
713 dg.buf->magic = 0;
714
715 contigfree(dg.buf, DCONS_BUF_SIZE, M_DEVBUF);
716 }
717
718 break;
719 case MOD_SHUTDOWN:
720 #if 0 /* Keep connection after halt */
721 dg.buf->magic = 0;
722 #endif
723 break;
724 default:
725 err = EOPNOTSUPP;
726 break;
727 }
728 return(err);
729 }
730
731 #if defined(GDB) && (__FreeBSD_version >= 502122)
732 /* Debugger interface */
733
734 static int
735 dcons_dbg_probe(void)
736 {
737 int dcons_gdb;
738
739 if (getenv_int("dcons_gdb", &dcons_gdb) == 0)
740 return (-1);
741 return (dcons_gdb);
742 }
743
744 static void
745 dcons_dbg_init(void)
746 {
747 }
748
749 static void
750 dcons_dbg_term(void)
751 {
752 }
753
754 static void
755 dcons_dbg_putc(int c)
756 {
757 struct dcons_softc *dc = &sc[DCONS_GDB];
758 dcons_os_putc(dc, c);
759 }
760
761 static int
762 dcons_dbg_getc(void)
763 {
764 struct dcons_softc *dc = &sc[DCONS_GDB];
765 return (dcons_os_getc(dc));
766 }
767 #endif
768
769 DEV_MODULE(dcons, dcons_modevent, NULL);
770 MODULE_VERSION(dcons, DCONS_VERSION);
Cache object: c59b683b27d3ae7c81d0bec8f96b877f
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