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 1.8 2007/01/09 07:23:03 dillon Exp $
37 #include <sys/systm.h>
38 #include <sys/kernel.h>
42 #include <sys/termios.h>
43 #include <sys/fcntl.h>
44 #include <machine/md_var.h>
48 static int console_stolen_by_kernel;
49 static struct callout console_callout;
52 * Global console locking functions
64 /************************************************************************
66 ************************************************************************
70 #define CDEV_MAJOR 183
72 static int vcons_tty_param(struct tty *tp, struct termios *tio);
73 static void vcons_tty_start(struct tty *tp);
74 static void vcons_intr(void *tpx);
76 static d_open_t vcons_open;
77 static d_close_t vcons_close;
78 static d_ioctl_t vcons_ioctl;
80 static struct dev_ops vcons_ops = {
81 { "vcons", CDEV_MAJOR, D_TTY },
83 .d_close = vcons_close,
86 .d_ioctl = vcons_ioctl,
91 vcons_open(struct dev_open_args *ap)
93 cdev_t dev = ap->a_head.a_dev;
97 if (minor(dev) != 255)
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 error = (*linesw[tp->t_line].l_open)(dev, tp);
118 callout_reset(&console_callout, hz / 30 + 1, vcons_intr, tp);
123 vcons_close(struct dev_close_args *ap)
125 cdev_t dev = ap->a_head.a_dev;
128 if (minor(dev) != 255)
131 (*linesw[tp->t_line].l_close)(tp, ap->a_fflag);
137 vcons_ioctl(struct dev_ioctl_args *ap)
139 cdev_t dev = ap->a_head.a_dev;
143 if (minor(dev) != 255)
146 error = (*linesw[tp->t_line].l_ioctl)(tp, ap->a_cmd, ap->a_data,
147 ap->a_fflag, ap->a_cred);
148 if (error != ENOIOCTL)
150 error = ttioctl(tp, ap->a_cmd, ap->a_data, ap->a_fflag);
151 if (error != ENOIOCTL)
157 vcons_tty_param(struct tty *tp, struct termios *tio)
159 tp->t_ispeed = tio->c_ispeed;
160 tp->t_ospeed = tio->c_ospeed;
161 tp->t_cflag = tio->c_cflag;
166 vcons_tty_start(struct tty *tp)
171 if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) {
175 tp->t_state |= TS_BUSY;
176 while ((n = q_to_b(&tp->t_outq, buf, sizeof(buf))) > 0)
178 tp->t_state &= ~TS_BUSY;
184 vcons_intr(void *tpx)
186 struct tty *tp = tpx;
187 unsigned char buf[32];
192 * If we aren't open we only have synchronous traffic via the
193 * debugger and do not need to poll.
195 if ((tp->t_state & TS_ISOPEN) == 0)
199 * Only poll if we are open and haven't been stolen by the debugger.
201 if (console_stolen_by_kernel == 0 && (tp->t_state & TS_ISOPEN)) {
203 n = extpread(0, buf, sizeof(buf), O_FNONBLOCKING, -1LL);
204 for (i = 0; i < n; ++i)
205 (*linesw[tp->t_line].l_rint)(buf[i], tp);
208 callout_reset(&console_callout, hz / 30 + 1, vcons_intr, tp);
211 /************************************************************************
212 * KERNEL CONSOLE INTERFACE *
213 ************************************************************************
215 * Kernel direct-call interface console driver
217 static cn_probe_t vconsprobe;
218 static cn_init_t vconsinit;
219 static cn_term_t vconsterm;
220 static cn_getc_t vconsgetc;
221 static cn_checkc_t vconscheckc;
222 static cn_putc_t vconsputc;
224 CONS_DRIVER(vcons, vconsprobe, vconsinit, vconsterm, vconsgetc,
225 vconscheckc, vconsputc, NULL);
228 vconsprobe(struct consdev *cp)
232 cp->cn_pri = CN_NORMAL;
233 cp->cn_dev = make_dev(&vcons_ops, 255,
234 UID_ROOT, GID_WHEEL, 0600, "vconsolectl");
236 if (tcgetattr(0, &tio) == 0) {
239 tcsetattr(0, TCSAFLUSH, &tio);
242 callout_init(&console_callout);
246 vconsinit(struct consdev *cp)
251 vconsterm(struct consdev *vp)
256 vconsgetc(cdev_t dev)
261 console_stolen_by_kernel = 1;
263 if ((n = read(0, &c, 1)) == 1)
265 if (n < 0 && errno == EINTR)
267 panic("vconsgetc: EOF on console %d %d", n ,errno);
269 console_stolen_by_kernel = 0;
274 vconscheckc(cdev_t dev)
278 if (extpread(0, &c, 1, O_FNONBLOCKING, -1LL) == 1)
284 vconsputc(cdev_t dev, int c)
292 vcons_set_mode(int in_debugger)
296 if (tcgetattr(0, &tio) < 0)
301 tio.c_cc[VINTR] = 'c' & 0x1f;
302 tio.c_cc[VSUSP] = 'z' & 0x1f;
303 tio.c_cc[VSTATUS] = 't' & 0x1f;
307 tio.c_cc[VSTATUS] = 0;
309 tcsetattr(0, TCSAFLUSH, &tio);