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 1.12 2007/02/01 20:53:19 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 <machine/md_var.h>
50 static int console_stolen_by_kernel;
51 static struct kqueue_info *kqueue_console_info;
54 * Global console locking functions
66 /************************************************************************
68 ************************************************************************
72 #define CDEV_MAJOR 183
74 static int vcons_tty_param(struct tty *tp, struct termios *tio);
75 static void vcons_tty_start(struct tty *tp);
76 static void vcons_intr(void *tpx, struct intrframe *frame __unused);
78 static d_open_t vcons_open;
79 static d_close_t vcons_close;
80 static d_ioctl_t vcons_ioctl;
82 static struct dev_ops vcons_ops = {
83 { "vcons", CDEV_MAJOR, D_TTY },
85 .d_close = vcons_close,
88 .d_ioctl = vcons_ioctl,
93 vcons_open(struct dev_open_args *ap)
95 cdev_t dev = ap->a_head.a_dev;
99 if (minor(dev) != 255)
102 tp = dev->si_tty = ttymalloc(dev->si_tty);
103 if ((tp->t_state & TS_ISOPEN) == 0) {
104 tp->t_oproc = vcons_tty_start;
105 tp->t_param = vcons_tty_param;
106 tp->t_stop = nottystop;
109 tp->t_state |= TS_CARR_ON | TS_CONNECTED;
111 tp->t_iflag = TTYDEF_IFLAG;
112 tp->t_oflag = TTYDEF_OFLAG;
113 tp->t_cflag = TTYDEF_CFLAG;
114 tp->t_lflag = TTYDEF_LFLAG;
115 tp->t_ispeed = TTYDEF_SPEED;
116 tp->t_ospeed = TTYDEF_SPEED;
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);
128 vcons_close(struct dev_close_args *ap)
130 cdev_t dev = ap->a_head.a_dev;
133 if (minor(dev) != 255)
136 (*linesw[tp->t_line].l_close)(tp, ap->a_fflag);
142 vcons_ioctl(struct dev_ioctl_args *ap)
144 cdev_t dev = ap->a_head.a_dev;
148 if (minor(dev) != 255)
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 tp->t_state &= ~TS_BUSY;
189 vcons_intr(void *tpx, struct intrframe *frame __unused)
191 struct tty *tp = tpx;
192 unsigned char buf[32];
197 * If we aren't open we only have synchronous traffic via the
198 * debugger and do not need to poll.
200 if ((tp->t_state & TS_ISOPEN) == 0)
204 * Only poll if we are open and haven't been stolen by the debugger.
206 if (console_stolen_by_kernel == 0 && (tp->t_state & TS_ISOPEN)) {
208 n = extpread(0, buf, sizeof(buf), O_FNONBLOCKING, -1LL);
209 for (i = 0; i < n; ++i)
210 (*linesw[tp->t_line].l_rint)(buf[i], tp);
215 /************************************************************************
216 * KERNEL CONSOLE INTERFACE *
217 ************************************************************************
219 * Kernel direct-call interface console driver
221 static cn_probe_t vconsprobe;
222 static cn_init_t vconsinit;
223 static cn_term_t vconsterm;
224 static cn_getc_t vconsgetc;
225 static cn_checkc_t vconscheckc;
226 static cn_putc_t vconsputc;
228 CONS_DRIVER(vcons, vconsprobe, vconsinit, vconsterm, vconsgetc,
229 vconscheckc, vconsputc, NULL);
231 static struct termios init_tio;
232 static struct consdev *vconsole;
235 vconsprobe(struct consdev *cp)
237 cp->cn_pri = CN_NORMAL;
238 cp->cn_dev = make_dev(&vcons_ops, 255,
239 UID_ROOT, GID_WHEEL, 0600, "vconsolectl");
243 * This is a little bulky handler to set proper terminal
244 * settings in the case of a signal which might lead to
245 * termination or suspension.
250 struct termios curtio;
251 struct sigaction sa, osa;
254 tcgetattr(0, &curtio);
255 tcsetattr(0, TCSAFLUSH, &init_tio);
256 bzero(&sa, sizeof(sa));
257 sigemptyset(&sa.sa_mask);
258 sa.sa_handler = SIG_DFL;
259 sigaction(sig, &sa, &osa);
262 sigprocmask(SIG_UNBLOCK, &ss, &oss);
263 raise(sig); /* now hand down the sig */
264 sigprocmask(SIG_SETMASK, &oss, NULL);
265 sigaction(sig, &osa, NULL);
266 tcsetattr(0, TCSAFLUSH, &curtio);
270 vconswinch(int __unused sig)
272 struct winsize newsize;
274 if (vconsole != NULL && vconsole->cn_dev->si_tty != NULL) {
275 ioctl(0, TIOCGWINSZ, &newsize);
277 * ttioctl(vconsole->cn_dev->si_tty, TIOCSWINSZ, &newsize, 0);
278 * I wished. Unfortunately this needs a curproc, so do it
281 if (bcmp(&newsize, &vconsole->cn_dev->si_tty->t_winsize,
282 sizeof(newsize)) != 0) {
283 vconsole->cn_dev->si_tty->t_winsize = newsize;
284 pgsignal(vconsole->cn_dev->si_tty->t_pgrp, SIGWINCH, 1);
292 tcsetattr(0, TCSAFLUSH, &init_tio);
296 vconsinit(struct consdev *cp)
302 tcgetattr(0, &init_tio);
303 bzero(&sa, sizeof(sa));
304 sigemptyset(&sa.sa_mask);
305 sa.sa_handler = vconssignal;
306 sigaction(SIGTSTP, &sa, NULL);
307 sigaction(SIGINT, &sa, NULL);
308 sigaction(SIGTERM, &sa, NULL);
309 atexit(vconscleanup);
311 sa.sa_handler = vconswinch;
312 sigaction(SIGWINCH, &sa, NULL);
318 vconsterm(struct consdev *vp)
325 vconsgetc(cdev_t dev)
330 console_stolen_by_kernel = 1;
332 if ((n = read(0, &c, 1)) == 1)
334 if (n < 0 && errno == EINTR)
336 panic("vconsgetc: EOF on console %d %d", n ,errno);
338 console_stolen_by_kernel = 0;
343 vconscheckc(cdev_t dev)
347 if (extpread(0, &c, 1, O_FNONBLOCKING, -1LL) == 1)
353 vconsputc(cdev_t dev, int c)
361 vcons_set_mode(int in_debugger)
365 if (tcgetattr(0, &tio) < 0)
370 tio.c_cc[VINTR] = init_tio.c_cc[VINTR];
371 tio.c_cc[VSUSP] = init_tio.c_cc[VSUSP];
372 tio.c_cc[VSTATUS] = init_tio.c_cc[VSTATUS];
374 tio.c_cc[VINTR] = _POSIX_VDISABLE;
375 tio.c_cc[VSUSP] = _POSIX_VDISABLE;
376 tio.c_cc[VSTATUS] = _POSIX_VDISABLE;
378 tcsetattr(0, TCSAFLUSH, &tio);