1993-06-12 14:58:17 +00:00
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/*
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* Copyright (c) 1988 University of Utah.
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* Copyright (c) 1991 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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1993-10-16 14:15:10 +00:00
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* from: @(#)cons.c 7.2 (Berkeley) 5/9/91
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1995-12-08 23:23:00 +00:00
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* $Id: cons.c,v 1.37 1995/12/08 11:13:21 julian Exp $
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1993-06-12 14:58:17 +00:00
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*/
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1994-08-13 03:50:34 +00:00
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#include <sys/param.h>
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1995-12-08 11:19:42 +00:00
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#ifdef DEVFS
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#include <sys/devfsext.h>
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#endif /*DEVFS*/
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1994-05-25 09:21:21 +00:00
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#include <sys/systm.h>
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1995-01-21 14:12:15 +00:00
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#include <sys/conf.h>
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1995-12-08 11:19:42 +00:00
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#include <sys/kernel.h>
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1994-08-13 03:50:34 +00:00
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#include <sys/proc.h>
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#include <sys/tty.h>
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1993-06-12 14:58:17 +00:00
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1994-08-13 03:50:34 +00:00
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#include <machine/cons.h>
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1995-01-21 14:12:15 +00:00
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#include <machine/stdarg.h>
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1993-06-12 14:58:17 +00:00
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1995-04-23 12:55:55 +00:00
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/* XXX this should be config(8)ed. */
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1995-04-24 16:43:01 +00:00
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#include "sc.h"
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#include "vt.h"
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#include "sio.h"
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1995-01-21 14:12:15 +00:00
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static struct consdev constab[] = {
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1995-09-10 21:36:12 +00:00
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#if NSC > 0
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{ sccnprobe, sccninit, sccngetc, sccncheckc, sccnputc },
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#endif
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#if NVT > 0
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1994-10-20 00:08:31 +00:00
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{ pccnprobe, pccninit, pccngetc, pccncheckc, pccnputc },
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1994-08-31 07:44:22 +00:00
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#endif
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1993-12-12 12:22:57 +00:00
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#if NSIO > 0
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1994-10-20 00:08:31 +00:00
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{ siocnprobe, siocninit, siocngetc, siocncheckc, siocnputc },
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1993-06-12 14:58:17 +00:00
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#endif
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{ 0 },
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};
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1995-12-08 11:19:42 +00:00
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static d_open_t cnopen;
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static d_close_t cnclose;
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static d_read_t cnread;
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static d_write_t cnwrite;
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static d_ioctl_t cnioctl;
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static d_select_t cnselect;
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#define CDEV_MAJOR 0
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1995-12-08 23:23:00 +00:00
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static struct cdevsw cn_cdevsw =
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1995-12-08 11:19:42 +00:00
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{ cnopen, cnclose, cnread, cnwrite, /*0*/
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cnioctl, nullstop, nullreset, nodevtotty,/* console */
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cnselect, nommap, NULL, "console", NULL, -1 };
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1993-06-12 14:58:17 +00:00
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struct tty *constty = 0; /* virtual console output device */
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struct tty *cn_tty; /* XXX: console tty struct for tprintf */
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1995-04-08 21:32:11 +00:00
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int cons_unavail = 0; /* XXX:
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* physical console not available for
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* input (i.e., it is in graphics mode)
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*/
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1993-06-12 14:58:17 +00:00
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1995-02-26 03:15:36 +00:00
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static u_char cn_is_open; /* nonzero if logical console is open */
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static u_char cn_phys_is_open; /* nonzero if physical console is open */
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1995-01-21 14:12:15 +00:00
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static d_close_t *cn_phys_close; /* physical device close function */
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static d_open_t *cn_phys_open; /* physical device open function */
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static struct consdev *cn_tab; /* physical console device info */
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1995-04-02 16:14:51 +00:00
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static struct tty *cn_tp; /* physical console tty struct */
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1995-12-08 11:19:42 +00:00
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#ifdef DEVFS
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void *cn_devfs_token; /* represents the devfs entry */
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#endif /* DEVFS */
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1995-01-21 14:12:15 +00:00
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1993-11-25 01:38:01 +00:00
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void
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1993-06-12 14:58:17 +00:00
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cninit()
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{
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1995-09-10 18:57:26 +00:00
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struct consdev *best_cp, *cp;
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1993-06-12 14:58:17 +00:00
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/*
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1995-09-10 18:57:26 +00:00
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* Find the first console with the highest priority.
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1993-06-12 14:58:17 +00:00
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*/
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1995-09-10 18:57:26 +00:00
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best_cp = NULL;
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1993-06-12 14:58:17 +00:00
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for (cp = constab; cp->cn_probe; cp++) {
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(*cp->cn_probe)(cp);
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if (cp->cn_pri > CN_DEAD &&
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1995-09-10 18:57:26 +00:00
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(best_cp == NULL || cp->cn_pri > best_cp->cn_pri))
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best_cp = cp;
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1993-06-12 14:58:17 +00:00
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}
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1995-09-10 18:57:26 +00:00
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1993-06-12 14:58:17 +00:00
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/*
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1995-09-10 18:57:26 +00:00
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* If no console, give up.
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1993-06-12 14:58:17 +00:00
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*/
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1995-09-10 18:57:26 +00:00
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if (best_cp == NULL) {
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cn_tab = best_cp;
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return;
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}
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/*
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* Initialize console, then attach to it. This ordering allows
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* debugging using the previous console, if any.
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* XXX if there was a previous console, then its driver should
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* be informed when we forget about it.
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*/
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(*best_cp->cn_init)(best_cp);
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cn_tab = best_cp;
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}
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void
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cninit_finish()
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{
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struct cdevsw *cdp;
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if (cn_tab == NULL)
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1993-06-12 14:58:17 +00:00
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return;
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1995-09-10 18:57:26 +00:00
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1995-01-21 14:12:15 +00:00
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/*
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* Hook the open and close functions.
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*/
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cdp = &cdevsw[major(cn_tab->cn_dev)];
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cn_phys_close = cdp->d_close;
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cdp->d_close = cnclose;
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cn_phys_open = cdp->d_open;
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cdp->d_open = cnopen;
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1995-04-02 16:14:51 +00:00
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cn_tp = (*cdp->d_devtotty)(cn_tab->cn_dev);
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1995-06-26 07:39:52 +00:00
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/*
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* XXX there are too many tty pointers. cn_tty is only used for
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* sysctl(CPU_CONSDEV) (not for tprintf like the above comment
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* says). cn_tp in struct consdev hasn't been initialized
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* (except statically to NULL) or used (except to initialize
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* cn_tty to the wrong value) for a year or two.
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*/
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cn_tty = cn_tp;
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1993-06-12 14:58:17 +00:00
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}
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1995-12-08 11:19:42 +00:00
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static int
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1993-06-12 14:58:17 +00:00
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cnopen(dev, flag, mode, p)
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dev_t dev;
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int flag, mode;
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struct proc *p;
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{
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1995-01-21 14:12:15 +00:00
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dev_t cndev, physdev;
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int retval;
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1994-01-23 19:17:17 +00:00
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1993-06-12 14:58:17 +00:00
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if (cn_tab == NULL)
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return (0);
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1995-01-21 14:12:15 +00:00
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cndev = cn_tab->cn_dev;
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physdev = (major(dev) == major(cndev) ? dev : cndev);
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retval = (*cn_phys_open)(physdev, flag, mode, p);
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if (retval == 0) {
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if (dev == cndev)
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cn_phys_is_open = 1;
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else if (physdev == cndev)
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cn_is_open = 1;
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}
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return (retval);
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1993-06-12 14:58:17 +00:00
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}
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1995-05-30 08:16:23 +00:00
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1995-12-08 11:19:42 +00:00
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static int
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1993-06-12 14:58:17 +00:00
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cnclose(dev, flag, mode, p)
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dev_t dev;
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int flag, mode;
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struct proc *p;
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{
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1995-01-21 14:12:15 +00:00
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dev_t cndev;
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1994-01-23 19:17:17 +00:00
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1993-06-12 14:58:17 +00:00
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if (cn_tab == NULL)
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return (0);
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1995-01-21 14:12:15 +00:00
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cndev = cn_tab->cn_dev;
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if (dev == cndev) {
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1995-04-02 16:14:51 +00:00
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/* the physical device is about to be closed */
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1995-01-21 14:12:15 +00:00
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cn_phys_is_open = 0;
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1995-04-02 16:14:51 +00:00
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if (cn_is_open) {
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if (cn_tp) {
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/* perform a ttyhalfclose() */
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/* reset session and proc group */
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cn_tp->t_pgrp = NULL;
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cn_tp->t_session = NULL;
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}
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1995-01-21 14:12:15 +00:00
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return (0);
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1995-04-02 16:14:51 +00:00
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}
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1995-01-21 14:12:15 +00:00
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} else if (major(dev) != major(cndev)) {
|
1995-04-02 16:14:51 +00:00
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/* the logical console is about to be closed */
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1995-01-21 14:12:15 +00:00
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cn_is_open = 0;
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if (cn_phys_is_open)
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return (0);
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dev = cndev;
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}
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return ((*cn_phys_close)(dev, flag, mode, p));
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1993-06-12 14:58:17 +00:00
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}
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1995-05-30 08:16:23 +00:00
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1995-12-08 11:19:42 +00:00
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static int
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1993-06-12 14:58:17 +00:00
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cnread(dev, uio, flag)
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dev_t dev;
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struct uio *uio;
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1993-11-25 01:38:01 +00:00
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int flag;
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1993-06-12 14:58:17 +00:00
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{
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if (cn_tab == NULL)
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return (0);
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dev = cn_tab->cn_dev;
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return ((*cdevsw[major(dev)].d_read)(dev, uio, flag));
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}
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1995-05-30 08:16:23 +00:00
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1995-12-08 11:19:42 +00:00
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static int
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1993-06-12 14:58:17 +00:00
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cnwrite(dev, uio, flag)
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dev_t dev;
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struct uio *uio;
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1993-11-25 01:38:01 +00:00
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int flag;
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1993-06-12 14:58:17 +00:00
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{
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if (cn_tab == NULL)
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return (0);
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1994-01-26 20:42:18 +00:00
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if (constty)
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1993-06-12 14:58:17 +00:00
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dev = constty->t_dev;
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else
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dev = cn_tab->cn_dev;
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return ((*cdevsw[major(dev)].d_write)(dev, uio, flag));
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}
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1995-05-30 08:16:23 +00:00
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1995-12-08 11:19:42 +00:00
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static int
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1993-06-12 14:58:17 +00:00
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cnioctl(dev, cmd, data, flag, p)
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dev_t dev;
|
1993-11-25 01:38:01 +00:00
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int cmd;
|
1993-06-12 14:58:17 +00:00
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caddr_t data;
|
1993-11-25 01:38:01 +00:00
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int flag;
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1993-06-12 14:58:17 +00:00
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struct proc *p;
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{
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int error;
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if (cn_tab == NULL)
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return (0);
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/*
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* Superuser can always use this to wrest control of console
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* output from the "virtual" console.
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*/
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if (cmd == TIOCCONS && constty) {
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error = suser(p->p_ucred, (u_short *) NULL);
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if (error)
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return (error);
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constty = NULL;
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return (0);
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}
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dev = cn_tab->cn_dev;
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return ((*cdevsw[major(dev)].d_ioctl)(dev, cmd, data, flag, p));
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}
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|
1995-12-08 11:19:42 +00:00
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static int
|
1993-06-12 14:58:17 +00:00
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cnselect(dev, rw, p)
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dev_t dev;
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int rw;
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struct proc *p;
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{
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if (cn_tab == NULL)
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return (1);
|
1995-02-25 20:09:44 +00:00
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dev = cn_tab->cn_dev;
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return ((*cdevsw[major(dev)].d_select)(dev, rw, p));
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1993-06-12 14:58:17 +00:00
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}
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1993-11-25 01:38:01 +00:00
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int
|
1993-06-12 14:58:17 +00:00
|
|
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cngetc()
|
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|
{
|
1994-12-18 19:35:59 +00:00
|
|
|
int c;
|
1993-06-12 14:58:17 +00:00
|
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|
if (cn_tab == NULL)
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return (0);
|
1994-12-18 19:35:59 +00:00
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|
c = (*cn_tab->cn_getc)(cn_tab->cn_dev);
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|
|
if (c == '\r') c = '\n'; /* console input is always ICRNL */
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|
return (c);
|
1993-06-12 14:58:17 +00:00
|
|
|
}
|
|
|
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|
1994-10-20 00:08:31 +00:00
|
|
|
int
|
|
|
|
cncheckc()
|
|
|
|
{
|
|
|
|
if (cn_tab == NULL)
|
|
|
|
return (0);
|
|
|
|
return ((*cn_tab->cn_checkc)(cn_tab->cn_dev));
|
|
|
|
}
|
|
|
|
|
1993-11-25 01:38:01 +00:00
|
|
|
void
|
1993-06-12 14:58:17 +00:00
|
|
|
cnputc(c)
|
|
|
|
register int c;
|
|
|
|
{
|
|
|
|
if (cn_tab == NULL)
|
|
|
|
return;
|
|
|
|
if (c) {
|
|
|
|
if (c == '\n')
|
|
|
|
(*cn_tab->cn_putc)(cn_tab->cn_dev, '\r');
|
1995-06-14 04:52:39 +00:00
|
|
|
(*cn_tab->cn_putc)(cn_tab->cn_dev, c);
|
1993-06-12 14:58:17 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
1993-11-07 17:41:36 +00:00
|
|
|
int
|
|
|
|
pg(const char *p, ...) {
|
|
|
|
va_list args;
|
|
|
|
va_start(args, p);
|
|
|
|
printf("%r\n>", p, args);
|
|
|
|
return(cngetc());
|
1993-06-12 14:58:17 +00:00
|
|
|
}
|
|
|
|
|
1995-11-29 10:49:16 +00:00
|
|
|
static cn_devsw_installed = 0;
|
|
|
|
|
1995-12-08 11:19:42 +00:00
|
|
|
static void
|
|
|
|
cn_drvinit(void *unused)
|
1995-11-29 10:49:16 +00:00
|
|
|
{
|
|
|
|
dev_t dev;
|
|
|
|
|
|
|
|
if( ! cn_devsw_installed ) {
|
|
|
|
dev = makedev(CDEV_MAJOR,0);
|
|
|
|
cdevsw_add(&dev,&cn_cdevsw,NULL);
|
|
|
|
cn_devsw_installed = 1;
|
|
|
|
#ifdef DEVFS
|
1995-12-08 11:19:42 +00:00
|
|
|
cn_devfs_token = devfs_add_devsw(
|
|
|
|
"/",
|
|
|
|
"console",
|
|
|
|
&cn_cdevsw,
|
|
|
|
0,
|
|
|
|
DV_CHR,
|
|
|
|
0,
|
|
|
|
0,
|
|
|
|
0640);
|
1995-11-29 10:49:16 +00:00
|
|
|
#endif
|
1995-11-29 14:41:20 +00:00
|
|
|
}
|
1995-11-29 10:49:16 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
SYSINIT(cndev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,cn_drvinit,NULL)
|
|
|
|
|
|
|
|
|