2 * Copyright (c) 2006 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * $DragonFly: src/sys/platform/vkernel/platform/console.c,v 1.17 2007/07/02 04:19:14 dillon Exp $
37 #include <sys/systm.h>
38 #include <sys/kernel.h>
42 #include <sys/termios.h>
43 #include <sys/fcntl.h>
44 #include <sys/signalvar.h>
45 #include <sys/eventhandler.h>
46 #include <sys/interrupt.h>
47 #include <machine/md_var.h>
52 static int console_stolen_by_kernel;
53 static struct kqueue_info *kqueue_console_info;
56 * Global console locking functions
68 /************************************************************************
70 ************************************************************************
74 #define CDEV_MAJOR 12 /* steal the same major as /dev/ttyv* */
76 static int vcons_tty_param(struct tty *tp, struct termios *tio);
77 static void vcons_tty_start(struct tty *tp);
78 static void vcons_intr(void *tpx, struct intrframe *frame __unused);
80 static d_open_t vcons_open;
81 static d_close_t vcons_close;
82 static d_ioctl_t vcons_ioctl;
84 static struct dev_ops vcons_ops = {
85 { "vcons", CDEV_MAJOR, D_TTY },
87 .d_close = vcons_close,
90 .d_ioctl = vcons_ioctl,
95 vcons_open(struct dev_open_args *ap)
97 cdev_t dev = ap->a_head.a_dev;
101 tp = dev->si_tty = ttymalloc(dev->si_tty);
102 if ((tp->t_state & TS_ISOPEN) == 0) {
103 tp->t_oproc = vcons_tty_start;
104 tp->t_param = vcons_tty_param;
105 tp->t_stop = nottystop;
108 tp->t_state |= TS_CARR_ON | TS_CONNECTED;
110 tp->t_iflag = TTYDEF_IFLAG;
111 tp->t_oflag = TTYDEF_OFLAG;
112 tp->t_cflag = TTYDEF_CFLAG;
113 tp->t_lflag = TTYDEF_LFLAG;
114 tp->t_ispeed = TTYDEF_SPEED;
115 tp->t_ospeed = TTYDEF_SPEED;
118 if (minor(dev) == 0) {
119 error = (*linesw[tp->t_line].l_open)(dev, tp);
120 ioctl(0, TIOCGWINSZ, &tp->t_winsize);
122 if (kqueue_console_info == NULL)
123 kqueue_console_info = kqueue_add(0, vcons_intr, tp);
125 /* dummy up other minors so the installer will run */
132 vcons_close(struct dev_close_args *ap)
134 cdev_t dev = ap->a_head.a_dev;
138 (*linesw[tp->t_line].l_close)(tp, ap->a_fflag);
144 vcons_ioctl(struct dev_ioctl_args *ap)
146 cdev_t dev = ap->a_head.a_dev;
151 error = (*linesw[tp->t_line].l_ioctl)(tp, ap->a_cmd, ap->a_data,
152 ap->a_fflag, ap->a_cred);
153 if (error != ENOIOCTL)
155 error = ttioctl(tp, ap->a_cmd, ap->a_data, ap->a_fflag);
156 if (error != ENOIOCTL)
162 vcons_tty_param(struct tty *tp, struct termios *tio)
164 tp->t_ispeed = tio->c_ispeed;
165 tp->t_ospeed = tio->c_ospeed;
166 tp->t_cflag = tio->c_cflag;
171 vcons_tty_start(struct tty *tp)
176 if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) {
180 tp->t_state |= TS_BUSY;
181 while ((n = q_to_b(&tp->t_outq, buf, sizeof(buf))) > 0) {
183 * Dummy up ttyv1, etc.
185 if (minor(tp->t_dev) == 0)
188 tp->t_state &= ~TS_BUSY;
194 vcons_intr(void *tpx, struct intrframe *frame __unused)
196 struct tty *tp = tpx;
197 unsigned char buf[32];
202 * If we aren't open we only have synchronous traffic via the
203 * debugger and do not need to poll.
205 if ((tp->t_state & TS_ISOPEN) == 0)
209 * Only poll if we are open and haven't been stolen by the debugger.
211 if (console_stolen_by_kernel == 0 && (tp->t_state & TS_ISOPEN)) {
213 n = extpread(0, buf, sizeof(buf), O_FNONBLOCKING, -1LL);
214 for (i = 0; i < n; ++i)
215 (*linesw[tp->t_line].l_rint)(buf[i], tp);
220 /************************************************************************
221 * KERNEL CONSOLE INTERFACE *
222 ************************************************************************
224 * Kernel direct-call interface console driver
226 static cn_probe_t vconsprobe;
227 static cn_init_t vconsinit;
228 static cn_init_fini_t vconsinit_fini;
229 static cn_term_t vconsterm;
230 static cn_getc_t vconsgetc;
231 static cn_checkc_t vconscheckc;
232 static cn_putc_t vconsputc;
234 CONS_DRIVER(vcons, vconsprobe, vconsinit, vconsinit_fini, vconsterm, vconsgetc,
235 vconscheckc, vconsputc, NULL);
237 static struct termios init_tio;
238 static struct consdev *vconsole;
241 vconsprobe(struct consdev *cp)
243 cp->cn_pri = CN_NORMAL;
244 cp->cn_probegood = 1;
248 * This is a little bulky handler to set proper terminal
249 * settings in the case of a signal which might lead to
250 * termination or suspension.
255 struct termios curtio;
256 struct sigaction sa, osa;
259 tcgetattr(0, &curtio);
260 tcsetattr(0, TCSAFLUSH, &init_tio);
261 bzero(&sa, sizeof(sa));
262 sigemptyset(&sa.sa_mask);
263 sa.sa_handler = SIG_DFL;
264 sigaction(sig, &sa, &osa);
267 sigprocmask(SIG_UNBLOCK, &ss, &oss);
268 raise(sig); /* now hand down the sig */
269 sigprocmask(SIG_SETMASK, &oss, NULL);
270 sigaction(sig, &osa, NULL);
271 tcsetattr(0, TCSAFLUSH, &curtio);
275 vconswinchsig(int __unused sig)
281 vconswinch_intr(void *arg __unused, void *frame __unused)
283 struct winsize newsize;
285 if (vconsole != NULL && vconsole->cn_dev->si_tty != NULL) {
286 ioctl(0, TIOCGWINSZ, &newsize);
288 * ttioctl(vconsole->cn_dev->si_tty, TIOCSWINSZ, &newsize, 0);
289 * I wished. Unfortunately this needs a curproc, so do it
292 if (bcmp(&newsize, &vconsole->cn_dev->si_tty->t_winsize,
293 sizeof(newsize)) != 0) {
294 vconsole->cn_dev->si_tty->t_winsize = newsize;
295 pgsignal(vconsole->cn_dev->si_tty->t_pgrp, SIGWINCH, 1);
304 * We might catch stray SIGIOs, so try hard.
306 while (tcsetattr(0, TCSAFLUSH, &init_tio) != 0 && errno == EINTR)
311 vconsinit(struct consdev *cp)
317 tcgetattr(0, &init_tio);
318 bzero(&sa, sizeof(sa));
319 sigemptyset(&sa.sa_mask);
320 sa.sa_handler = vconssignal;
321 sigaction(SIGTSTP, &sa, NULL);
322 sigaction(SIGINT, &sa, NULL);
323 sigaction(SIGTERM, &sa, NULL);
324 atexit(vconscleanup);
329 vconsinit_fini(struct consdev *cp)
336 * We have to do this here rather then in early boot to be able
337 * to use the interrupt subsystem.
339 register_int(3, vconswinch_intr, NULL, "swinch", NULL, 0);
340 bzero(&sa, sizeof(sa));
341 sigemptyset(&sa.sa_mask);
342 sa.sa_handler = vconswinchsig;
343 sigaction(SIGWINCH, &sa, NULL);
346 * Implement ttyv0-ttyv7. At the moment ttyv1-7 are sink nulls.
348 dev_ops_add(&vcons_ops, -1 & ~7, 0);
349 for (i = 0; i < 8; ++i) {
350 dev = make_dev(&vcons_ops, i,
351 UID_ROOT, GID_WHEEL, 0600, "ttyv%d", i);
355 EVENTHANDLER_REGISTER(shutdown_final, vconscleanup, NULL, SHUTDOWN_PRI_LAST);
359 vconsterm(struct consdev *vp)
366 vconsgetc(void *private)
371 console_stolen_by_kernel = 1;
373 if ((n = read(0, &c, 1)) == 1)
375 if (n < 0 && errno == EINTR)
377 panic("vconsgetc: EOF on console %d %d", n ,errno);
379 console_stolen_by_kernel = 0;
384 vconscheckc(void *private)
388 if (extpread(0, &c, 1, O_FNONBLOCKING, -1LL) == 1)
394 vconsputc(void *private, int c)
402 vcons_set_mode(int in_debugger)
406 if (tcgetattr(0, &tio) < 0)
409 tio.c_oflag |= OPOST | ONLCR;
412 tio.c_cc[VINTR] = init_tio.c_cc[VINTR];
413 tio.c_cc[VSUSP] = init_tio.c_cc[VSUSP];
414 tio.c_cc[VSTATUS] = init_tio.c_cc[VSTATUS];
416 tio.c_cc[VINTR] = _POSIX_VDISABLE;
417 tio.c_cc[VSUSP] = _POSIX_VDISABLE;
418 tio.c_cc[VSTATUS] = _POSIX_VDISABLE;
420 tcsetattr(0, TCSAFLUSH, &tio);