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);
103 #define ISSET(t, f) ((t) & (f))
105 if ((tp->t_state & TS_ISOPEN) == 0) {
106 tp->t_oproc = vcons_tty_start;
107 tp->t_param = vcons_tty_param;
108 tp->t_stop = nottystop;
111 tp->t_state |= TS_CARR_ON | TS_CONNECTED;
113 tp->t_iflag = TTYDEF_IFLAG;
114 tp->t_oflag = TTYDEF_OFLAG;
115 tp->t_cflag = TTYDEF_CFLAG;
116 tp->t_lflag = TTYDEF_LFLAG;
117 tp->t_ispeed = TTYDEF_SPEED;
118 tp->t_ospeed = TTYDEF_SPEED;
121 if (minor(dev) == 0) {
122 error = (*linesw[tp->t_line].l_open)(dev, tp);
123 ioctl(0, TIOCGWINSZ, &tp->t_winsize);
125 if (kqueue_console_info == NULL)
126 kqueue_console_info = kqueue_add(0, vcons_intr, tp);
128 /* dummy up other minors so the installer will run */
135 vcons_close(struct dev_close_args *ap)
137 cdev_t dev = ap->a_head.a_dev;
141 (*linesw[tp->t_line].l_close)(tp, ap->a_fflag);
147 vcons_ioctl(struct dev_ioctl_args *ap)
149 cdev_t dev = ap->a_head.a_dev;
154 error = (*linesw[tp->t_line].l_ioctl)(tp, ap->a_cmd, ap->a_data,
155 ap->a_fflag, ap->a_cred);
156 if (error != ENOIOCTL)
158 error = ttioctl(tp, ap->a_cmd, ap->a_data, ap->a_fflag);
159 if (error != ENOIOCTL)
165 vcons_tty_param(struct tty *tp, struct termios *tio)
167 tp->t_ispeed = tio->c_ispeed;
168 tp->t_ospeed = tio->c_ospeed;
169 tp->t_cflag = tio->c_cflag;
174 vcons_tty_start(struct tty *tp)
179 if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) {
183 tp->t_state |= TS_BUSY;
184 while ((n = q_to_b(&tp->t_outq, buf, sizeof(buf))) > 0) {
186 * Dummy up ttyv1, etc.
188 if (minor(tp->t_dev) == 0) {
189 pwrite(1, buf, n, -1);
192 tp->t_state &= ~TS_BUSY;
198 vcons_intr(void *tpx, struct intrframe *frame __unused)
200 struct tty *tp = tpx;
201 unsigned char buf[32];
206 * If we aren't open we only have synchronous traffic via the
207 * debugger and do not need to poll.
209 if ((tp->t_state & TS_ISOPEN) == 0)
213 * Only poll if we are open and haven't been stolen by the debugger.
215 if (console_stolen_by_kernel == 0 && (tp->t_state & TS_ISOPEN)) {
217 n = extpread(0, buf, sizeof(buf), O_FNONBLOCKING, -1LL);
218 for (i = 0; i < n; ++i)
219 (*linesw[tp->t_line].l_rint)(buf[i], tp);
224 /************************************************************************
225 * KERNEL CONSOLE INTERFACE *
226 ************************************************************************
228 * Kernel direct-call interface console driver
230 static cn_probe_t vconsprobe;
231 static cn_init_t vconsinit;
232 static cn_init_fini_t vconsinit_fini;
233 static cn_term_t vconsterm;
234 static cn_getc_t vconsgetc;
235 static cn_checkc_t vconscheckc;
236 static cn_putc_t vconsputc;
238 CONS_DRIVER(vcons, vconsprobe, vconsinit, vconsinit_fini, vconsterm, vconsgetc,
239 vconscheckc, vconsputc, NULL);
241 static struct termios init_tio;
242 static struct consdev *vconsole;
245 vconsprobe(struct consdev *cp)
247 cp->cn_pri = CN_NORMAL;
248 cp->cn_probegood = 1;
252 * This is a little bulky handler to set proper terminal
253 * settings in the case of a signal which might lead to
254 * termination or suspension.
259 struct termios curtio;
260 struct sigaction sa, osa;
263 tcgetattr(0, &curtio);
264 tcsetattr(0, TCSAFLUSH, &init_tio);
265 bzero(&sa, sizeof(sa));
266 sigemptyset(&sa.sa_mask);
267 sa.sa_handler = SIG_DFL;
268 sigaction(sig, &sa, &osa);
271 sigprocmask(SIG_UNBLOCK, &ss, &oss);
272 raise(sig); /* now hand down the sig */
273 sigprocmask(SIG_SETMASK, &oss, NULL);
274 sigaction(sig, &osa, NULL);
275 tcsetattr(0, TCSAFLUSH, &curtio);
279 vconswinchsig(int __unused sig)
285 vconswinch_intr(void *arg __unused, void *frame __unused)
287 struct winsize newsize;
289 if (vconsole != NULL && vconsole->cn_dev->si_tty != NULL) {
290 ioctl(0, TIOCGWINSZ, &newsize);
292 * ttioctl(vconsole->cn_dev->si_tty, TIOCSWINSZ, &newsize, 0);
293 * I wished. Unfortunately this needs a curproc, so do it
296 if (bcmp(&newsize, &vconsole->cn_dev->si_tty->t_winsize,
297 sizeof(newsize)) != 0) {
298 vconsole->cn_dev->si_tty->t_winsize = newsize;
299 pgsignal(vconsole->cn_dev->si_tty->t_pgrp, SIGWINCH, 1);
308 * We might catch stray SIGIOs, so try hard.
310 while (tcsetattr(0, TCSAFLUSH, &init_tio) != 0 && errno == EINTR)
315 vconsinit(struct consdev *cp)
321 tcgetattr(0, &init_tio);
322 bzero(&sa, sizeof(sa));
323 sigemptyset(&sa.sa_mask);
324 sa.sa_handler = vconssignal;
325 sigaction(SIGTSTP, &sa, NULL);
326 sigaction(SIGINT, &sa, NULL);
327 sigaction(SIGTERM, &sa, NULL);
328 atexit(vconscleanup);
333 vconsinit_fini(struct consdev *cp)
340 * We have to do this here rather then in early boot to be able
341 * to use the interrupt subsystem.
343 register_int(3, vconswinch_intr, NULL, "swinch", NULL, 0);
344 bzero(&sa, sizeof(sa));
345 sigemptyset(&sa.sa_mask);
346 sa.sa_handler = vconswinchsig;
347 sigaction(SIGWINCH, &sa, NULL);
350 * Implement ttyv0-ttyv7. At the moment ttyv1-7 are sink nulls.
352 for (i = 0; i < 8; ++i) {
353 dev = make_dev(&vcons_ops, i,
354 UID_ROOT, GID_WHEEL, 0600, "ttyv%d", i);
359 EVENTHANDLER_REGISTER(shutdown_final, vconscleanup, NULL, SHUTDOWN_PRI_LAST);
363 vconsterm(struct consdev *vp)
370 vconsgetc(void *private)
375 console_stolen_by_kernel = 1;
377 n = pread(0, &c, 1, -1);
380 if (n < 0 && errno == EINTR)
382 panic("vconsgetc: EOF on console %d %d", n ,errno);
384 console_stolen_by_kernel = 0;
389 vconscheckc(void *private)
393 if (extpread(0, &c, 1, O_FNONBLOCKING, -1LL) == 1)
399 vconsputc(void *private, int c)
403 pwrite(1, &cc, 1, -1);
407 vcons_set_mode(int in_debugger)
411 if (tcgetattr(0, &tio) < 0)
414 tio.c_oflag |= OPOST | ONLCR;
417 tio.c_cc[VINTR] = init_tio.c_cc[VINTR];
418 tio.c_cc[VSUSP] = init_tio.c_cc[VSUSP];
419 tio.c_cc[VSTATUS] = init_tio.c_cc[VSTATUS];
421 tio.c_cc[VINTR] = _POSIX_VDISABLE;
422 tio.c_cc[VSUSP] = _POSIX_VDISABLE;
423 tio.c_cc[VSTATUS] = _POSIX_VDISABLE;
425 tcsetattr(0, TCSAFLUSH, &tio);