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 1.16 2007/06/07 22:58:22 corecode 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 <machine/md_var.h>
51 static int console_stolen_by_kernel;
52 static struct kqueue_info *kqueue_console_info;
55 * Global console locking functions
67 /************************************************************************
69 ************************************************************************
73 #define CDEV_MAJOR 12 /* steal the same major as /dev/ttyv* */
75 static int vcons_tty_param(struct tty *tp, struct termios *tio);
76 static void vcons_tty_start(struct tty *tp);
77 static void vcons_intr(void *tpx, struct intrframe *frame __unused);
79 static d_open_t vcons_open;
80 static d_close_t vcons_close;
81 static d_ioctl_t vcons_ioctl;
83 static struct dev_ops vcons_ops = {
84 { "vcons", CDEV_MAJOR, D_TTY },
86 .d_close = vcons_close,
89 .d_ioctl = vcons_ioctl,
94 vcons_open(struct dev_open_args *ap)
96 cdev_t dev = ap->a_head.a_dev;
100 tp = dev->si_tty = ttymalloc(dev->si_tty);
101 if ((tp->t_state & TS_ISOPEN) == 0) {
102 tp->t_oproc = vcons_tty_start;
103 tp->t_param = vcons_tty_param;
104 tp->t_stop = nottystop;
107 tp->t_state |= TS_CARR_ON | TS_CONNECTED;
109 tp->t_iflag = TTYDEF_IFLAG;
110 tp->t_oflag = TTYDEF_OFLAG;
111 tp->t_cflag = TTYDEF_CFLAG;
112 tp->t_lflag = TTYDEF_LFLAG;
113 tp->t_ispeed = TTYDEF_SPEED;
114 tp->t_ospeed = TTYDEF_SPEED;
117 if (minor(dev) == 0) {
118 error = (*linesw[tp->t_line].l_open)(dev, tp);
119 ioctl(0, TIOCGWINSZ, &tp->t_winsize);
121 if (kqueue_console_info == NULL)
122 kqueue_console_info = kqueue_add(0, vcons_intr, tp);
124 /* dummy up other minors so the installer will run */
131 vcons_close(struct dev_close_args *ap)
133 cdev_t dev = ap->a_head.a_dev;
137 (*linesw[tp->t_line].l_close)(tp, ap->a_fflag);
143 vcons_ioctl(struct dev_ioctl_args *ap)
145 cdev_t dev = ap->a_head.a_dev;
150 error = (*linesw[tp->t_line].l_ioctl)(tp, ap->a_cmd, ap->a_data,
151 ap->a_fflag, ap->a_cred);
152 if (error != ENOIOCTL)
154 error = ttioctl(tp, ap->a_cmd, ap->a_data, ap->a_fflag);
155 if (error != ENOIOCTL)
161 vcons_tty_param(struct tty *tp, struct termios *tio)
163 tp->t_ispeed = tio->c_ispeed;
164 tp->t_ospeed = tio->c_ospeed;
165 tp->t_cflag = tio->c_cflag;
170 vcons_tty_start(struct tty *tp)
175 if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) {
179 tp->t_state |= TS_BUSY;
180 while ((n = q_to_b(&tp->t_outq, buf, sizeof(buf))) > 0) {
182 * Dummy up ttyv1, etc.
184 if (minor(tp->t_dev) == 0)
187 tp->t_state &= ~TS_BUSY;
193 vcons_intr(void *tpx, struct intrframe *frame __unused)
195 struct tty *tp = tpx;
196 unsigned char buf[32];
201 * If we aren't open we only have synchronous traffic via the
202 * debugger and do not need to poll.
204 if ((tp->t_state & TS_ISOPEN) == 0)
208 * Only poll if we are open and haven't been stolen by the debugger.
210 if (console_stolen_by_kernel == 0 && (tp->t_state & TS_ISOPEN)) {
212 n = extpread(0, buf, sizeof(buf), O_FNONBLOCKING, -1LL);
213 for (i = 0; i < n; ++i)
214 (*linesw[tp->t_line].l_rint)(buf[i], tp);
219 /************************************************************************
220 * KERNEL CONSOLE INTERFACE *
221 ************************************************************************
223 * Kernel direct-call interface console driver
225 static cn_probe_t vconsprobe;
226 static cn_init_t vconsinit;
227 static cn_init_fini_t vconsinit_fini;
228 static cn_term_t vconsterm;
229 static cn_getc_t vconsgetc;
230 static cn_checkc_t vconscheckc;
231 static cn_putc_t vconsputc;
233 CONS_DRIVER(vcons, vconsprobe, vconsinit, vconsinit_fini, vconsterm, vconsgetc,
234 vconscheckc, vconsputc, NULL);
236 static struct termios init_tio;
237 static struct consdev *vconsole;
240 vconsprobe(struct consdev *cp)
242 cp->cn_pri = CN_NORMAL;
243 cp->cn_probegood = 1;
247 * This is a little bulky handler to set proper terminal
248 * settings in the case of a signal which might lead to
249 * termination or suspension.
254 struct termios curtio;
255 struct sigaction sa, osa;
258 tcgetattr(0, &curtio);
259 tcsetattr(0, TCSAFLUSH, &init_tio);
260 bzero(&sa, sizeof(sa));
261 sigemptyset(&sa.sa_mask);
262 sa.sa_handler = SIG_DFL;
263 sigaction(sig, &sa, &osa);
266 sigprocmask(SIG_UNBLOCK, &ss, &oss);
267 raise(sig); /* now hand down the sig */
268 sigprocmask(SIG_SETMASK, &oss, NULL);
269 sigaction(sig, &osa, NULL);
270 tcsetattr(0, TCSAFLUSH, &curtio);
274 vconswinch(int __unused sig)
276 struct winsize newsize;
278 if (vconsole != NULL && vconsole->cn_dev->si_tty != NULL) {
279 ioctl(0, TIOCGWINSZ, &newsize);
281 * ttioctl(vconsole->cn_dev->si_tty, TIOCSWINSZ, &newsize, 0);
282 * I wished. Unfortunately this needs a curproc, so do it
285 if (bcmp(&newsize, &vconsole->cn_dev->si_tty->t_winsize,
286 sizeof(newsize)) != 0) {
287 vconsole->cn_dev->si_tty->t_winsize = newsize;
288 pgsignal(vconsole->cn_dev->si_tty->t_pgrp, SIGWINCH, 1);
297 * We might catch stray SIGIOs, so try hard.
299 while (tcsetattr(0, TCSAFLUSH, &init_tio) != 0 && errno == EINTR)
304 vconsinit(struct consdev *cp)
310 tcgetattr(0, &init_tio);
311 bzero(&sa, sizeof(sa));
312 sigemptyset(&sa.sa_mask);
313 sa.sa_handler = vconssignal;
314 sigaction(SIGTSTP, &sa, NULL);
315 sigaction(SIGINT, &sa, NULL);
316 sigaction(SIGTERM, &sa, NULL);
317 atexit(vconscleanup);
319 sa.sa_handler = vconswinch;
320 sigaction(SIGWINCH, &sa, NULL);
326 vconsinit_fini(struct consdev *cp)
332 * Implement ttyv0-ttyv7. At the moment ttyv1-7 are sink nulls.
334 dev_ops_add(&vcons_ops, -1 & ~7, 0);
335 for (i = 0; i < 8; ++i) {
336 dev = make_dev(&vcons_ops, i,
337 UID_ROOT, GID_WHEEL, 0600, "ttyv%d", i);
341 EVENTHANDLER_REGISTER(shutdown_final, vconscleanup, NULL, SHUTDOWN_PRI_LAST);
345 vconsterm(struct consdev *vp)
352 vconsgetc(void *private)
357 console_stolen_by_kernel = 1;
359 if ((n = read(0, &c, 1)) == 1)
361 if (n < 0 && errno == EINTR)
363 panic("vconsgetc: EOF on console %d %d", n ,errno);
365 console_stolen_by_kernel = 0;
370 vconscheckc(void *private)
374 if (extpread(0, &c, 1, O_FNONBLOCKING, -1LL) == 1)
380 vconsputc(void *private, int c)
388 vcons_set_mode(int in_debugger)
392 if (tcgetattr(0, &tio) < 0)
395 tio.c_oflag |= OPOST | ONLCR;
398 tio.c_cc[VINTR] = init_tio.c_cc[VINTR];
399 tio.c_cc[VSUSP] = init_tio.c_cc[VSUSP];
400 tio.c_cc[VSTATUS] = init_tio.c_cc[VSTATUS];
402 tio.c_cc[VINTR] = _POSIX_VDISABLE;
403 tio.c_cc[VSUSP] = _POSIX_VDISABLE;
404 tio.c_cc[VSTATUS] = _POSIX_VDISABLE;
406 tcsetattr(0, TCSAFLUSH, &tio);