724 lines
14 KiB
C
724 lines
14 KiB
C
/* $NetBSD: kd.c,v 1.23 2002/10/23 09:12:09 jdolecek Exp $ */
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/*-
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* Copyright (c) 1996 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Gordon W. Ross.
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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 NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Console driver based on PROM primitives.
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*
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* This driver exists to provide a tty device that the indirect
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* console driver can point to. It also provides a hook that
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* allows another device to serve console input. This will normally
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* be a keyboard driver (see sys/dev/sun/kbd.c)
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*/
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#include "opt_kgdb.h"
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#include "fb.h"
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#include <sys/param.h>
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#include <sys/proc.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/ioctl.h>
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#include <sys/tty.h>
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#include <sys/file.h>
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#include <sys/conf.h>
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#include <sys/device.h>
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#include <machine/bsd_openprom.h>
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#include <machine/promlib.h>
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#include <machine/eeprom.h>
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#include <machine/psl.h>
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#include <machine/cpu.h>
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#include <machine/kbd.h>
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#include <machine/autoconf.h>
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#if defined(RASTERCONSOLE) && NFB > 0
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#include <dev/sun/fbio.h>
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#include <dev/sun/fbvar.h>
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#endif
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#include <dev/cons.h>
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#include <sparc/dev/cons.h>
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#include <dev/sun/event_var.h>
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#include <dev/sun/kbd_xlate.h>
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#include <dev/sun/kbdvar.h>
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#define PUT_WSIZE 64
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struct kd_softc {
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struct device kd_dev; /* required first: base device */
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struct tty *kd_tty;
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int rows, cols;
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/* Console input hook */
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struct cons_channel *kd_in;
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};
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/*
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* There is no point in pretending there might be
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* more than one keyboard/display device.
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*/
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static struct kd_softc kd_softc;
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static int kdparam(struct tty *, struct termios *);
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static void kdstart(struct tty *);
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static void kd_init __P((struct kd_softc *));
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static void kd_cons_input __P((int));
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dev_type_open(kdopen);
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dev_type_close(kdclose);
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dev_type_read(kdread);
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dev_type_write(kdwrite);
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dev_type_ioctl(kdioctl);
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dev_type_tty(kdtty);
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dev_type_poll(kdpoll);
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const struct cdevsw kd_cdevsw = {
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kdopen, kdclose, kdread, kdwrite, kdioctl,
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nostop, kdtty, kdpoll, nommap, ttykqfilter, D_TTY
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};
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/*
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* Prepare the console tty; called on first open of /dev/console
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*/
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void
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kd_init(kd)
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struct kd_softc *kd;
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{
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struct tty *tp;
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tp = ttymalloc();
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tp->t_oproc = kdstart;
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tp->t_param = kdparam;
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tp->t_dev = makedev(cdevsw_lookup_major(&kd_cdevsw), 0);
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tty_attach(tp);
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kd->kd_tty = tp;
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/*
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* Get the console struct winsize.
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*/
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#if defined(RASTERCONSOLE) && NFB > 0
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/* If the raster console driver is attached, copy its size */
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kd->rows = fbrcons_rows();
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kd->cols = fbrcons_cols();
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rcons_ttyinit(tp);
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#endif
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/* else, consult the PROM */
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switch (prom_version()) {
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char *prop;
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struct eeprom *ep;
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case PROM_OLDMON:
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if ((ep = (struct eeprom *)eeprom_va) == NULL)
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break;
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if (kd->rows == 0)
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kd->rows = (u_short)ep->eeTtyRows;
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if (kd->cols == 0)
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kd->cols = (u_short)ep->eeTtyCols;
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break;
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case PROM_OBP_V0:
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case PROM_OBP_V2:
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case PROM_OBP_V3:
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case PROM_OPENFIRM:
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if (kd->rows == 0 &&
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(prop = PROM_getpropstring(optionsnode, "screen-#rows"))) {
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int i = 0;
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while (*prop != '\0')
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i = i * 10 + *prop++ - '0';
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kd->rows = (unsigned short)i;
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}
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if (kd->cols == 0 &&
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(prop = PROM_getpropstring(optionsnode, "screen-#columns"))) {
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int i = 0;
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while (*prop != '\0')
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i = i * 10 + *prop++ - '0';
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kd->cols = (unsigned short)i;
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}
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break;
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}
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return;
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}
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struct tty *
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kdtty(dev)
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dev_t dev;
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{
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struct kd_softc *kd;
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kd = &kd_softc; /* XXX */
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return (kd->kd_tty);
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}
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int
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kdopen(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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struct kd_softc *kd;
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int error, s, unit;
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struct tty *tp;
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static int firstopen = 1;
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unit = minor(dev);
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if (unit != 0)
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return ENXIO;
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kd = &kd_softc; /* XXX */
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if (firstopen) {
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kd_init(kd);
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firstopen = 0;
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}
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tp = kd->kd_tty;
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/* It's simpler to do this up here. */
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if (((tp->t_state & (TS_ISOPEN | TS_XCLUDE))
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== (TS_ISOPEN | TS_XCLUDE))
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&& (p->p_ucred->cr_uid != 0) )
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{
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return (EBUSY);
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}
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s = spltty();
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if ((tp->t_state & TS_ISOPEN) == 0) {
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/* First open. */
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/* Notify the input device that serves us */
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struct cons_channel *cc = kd->kd_in;
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if (cc != NULL &&
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(error = (*cc->cc_iopen)(cc)) != 0) {
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return (error);
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}
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ttychars(tp);
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tp->t_iflag = TTYDEF_IFLAG;
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tp->t_oflag = TTYDEF_OFLAG;
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tp->t_cflag = TTYDEF_CFLAG;
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tp->t_lflag = TTYDEF_LFLAG;
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tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED;
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(void) kdparam(tp, &tp->t_termios);
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ttsetwater(tp);
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tp->t_winsize.ws_row = kd->rows;
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tp->t_winsize.ws_col = kd->cols;
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/* Flush pending input? Clear translator? */
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/* This (pseudo)device always has SOFTCAR */
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tp->t_state |= TS_CARR_ON;
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}
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splx(s);
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return ((*tp->t_linesw->l_open)(dev, tp));
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}
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int
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kdclose(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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struct kd_softc *kd;
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struct tty *tp;
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struct cons_channel *cc;
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kd = &kd_softc; /* XXX */
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tp = kd->kd_tty;
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/* XXX This is for cons.c. */
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if ((tp->t_state & TS_ISOPEN) == 0)
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return 0;
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(*tp->t_linesw->l_close)(tp, flag);
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ttyclose(tp);
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if ((cc = kd->kd_in) != NULL)
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(void)(*cc->cc_iclose)(cc);
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return (0);
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}
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int
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kdread(dev, uio, flag)
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dev_t dev;
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struct uio *uio;
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int flag;
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{
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struct kd_softc *kd;
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struct tty *tp;
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kd = &kd_softc; /* XXX */
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tp = kd->kd_tty;
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return ((*tp->t_linesw->l_read)(tp, uio, flag));
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}
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int
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kdwrite(dev, uio, flag)
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dev_t dev;
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struct uio *uio;
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int flag;
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{
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struct kd_softc *kd;
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struct tty *tp;
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kd = &kd_softc; /* XXX */
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tp = kd->kd_tty;
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return ((*tp->t_linesw->l_write)(tp, uio, flag));
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}
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int
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kdpoll(dev, events, p)
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dev_t dev;
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int events;
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struct proc *p;
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{
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struct kd_softc *kd;
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struct tty *tp;
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kd = &kd_softc; /* XXX */
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tp = kd->kd_tty;
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return ((*tp->t_linesw->l_poll)(tp, events, p));
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}
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int
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kdioctl(dev, cmd, data, flag, p)
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dev_t dev;
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u_long cmd;
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caddr_t data;
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int flag;
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struct proc *p;
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{
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struct kd_softc *kd;
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struct tty *tp;
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int error;
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kd = &kd_softc; /* XXX */
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tp = kd->kd_tty;
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error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p);
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if (error != EPASSTHROUGH)
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return error;
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error = ttioctl(tp, cmd, data, flag, p);
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if (error != EPASSTHROUGH)
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return error;
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/* Handle any ioctl commands specific to kbd/display. */
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/* XXX - Send KB* ioctls to kbd module? */
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/* XXX - Send FB* ioctls to fb module? */
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return EPASSTHROUGH;
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}
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static int
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kdparam(tp, t)
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struct tty *tp;
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struct termios *t;
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{
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/* XXX - These are ignored... */
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tp->t_ispeed = t->c_ispeed;
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tp->t_ospeed = t->c_ospeed;
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tp->t_cflag = t->c_cflag;
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return 0;
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}
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static void kd_later(void*);
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static void kd_putfb(struct tty *);
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static void
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kdstart(tp)
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struct tty *tp;
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{
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struct clist *cl;
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int s;
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s = spltty();
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if (tp->t_state & (TS_BUSY|TS_TTSTOP|TS_TIMEOUT))
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goto out;
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cl = &tp->t_outq;
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if (cl->c_cc) {
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tp->t_state |= TS_BUSY;
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if ((s & PSR_PIL) == 0) {
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/* called at level zero - update screen now. */
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(void) spllowersoftclock();
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kd_putfb(tp);
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(void) spltty();
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tp->t_state &= ~TS_BUSY;
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} else {
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/* called at interrupt level - do it later */
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callout_reset(&tp->t_rstrt_ch, 0, kd_later, tp);
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}
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}
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if (cl->c_cc <= tp->t_lowat) {
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if (tp->t_state & TS_ASLEEP) {
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tp->t_state &= ~TS_ASLEEP;
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wakeup((caddr_t)cl);
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}
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selwakeup(&tp->t_wsel);
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}
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out:
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splx(s);
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}
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/*
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* Timeout function to do delayed writes to the screen.
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* Called at splsoftclock when requested by kdstart.
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*/
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static void
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kd_later(arg)
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void *arg;
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{
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struct tty *tp = arg;
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int s;
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kd_putfb(tp);
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s = spltty();
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tp->t_state &= ~TS_BUSY;
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(*tp->t_linesw->l_start)(tp);
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splx(s);
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}
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/*
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* Put text on the screen using the PROM monitor.
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* This can take a while, so to avoid missing
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* interrupts, this is called at splsoftclock.
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*/
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static void
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kd_putfb(tp)
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struct tty *tp;
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{
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char buf[PUT_WSIZE];
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struct clist *cl = &tp->t_outq;
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char *p, *end;
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int len;
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while ((len = q_to_b(cl, buf, PUT_WSIZE-1)) > 0) {
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/* PROM will barf if high bits are set. */
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p = buf;
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end = buf + len;
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while (p < end)
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*p++ &= 0x7f;
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/* Now let the PROM print it. */
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prom_putstr(buf, len);
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}
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}
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/*
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* Our "interrupt" routine for input. This is called by
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* the keyboard driver (dev/sun/kbd.c) at spltty.
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*/
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void
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kd_cons_input(c)
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int c;
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{
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struct kd_softc *kd = &kd_softc;
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struct tty *tp;
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/* XXX: Make sure the device is open. */
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tp = kd->kd_tty;
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if (tp == NULL)
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return;
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if ((tp->t_state & TS_ISOPEN) == 0)
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return;
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(*tp->t_linesw->l_rint)(c, tp);
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}
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void
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cons_attach_input(cc, cn)
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struct cons_channel *cc;
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struct consdev *cn;
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{
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struct kd_softc *kd = &kd_softc;
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kd->kd_in = cc;
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cc->cc_upstream = kd_cons_input;
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}
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void kd_attach_input(struct cons_channel *);
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void
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kd_attach_input(cc)
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struct cons_channel *cc;
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{
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struct kd_softc *kd = &kd_softc;
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kd->kd_in = cc;
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cc->cc_upstream = kd_cons_input;
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}
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/*
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* Default PROM-based console input stream
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* Since the PROM does not notify us when data is available on the
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* input channel these functions periodically poll the PROM.
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*/
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static int kd_rom_iopen __P((struct cons_channel *));
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static int kd_rom_iclose __P((struct cons_channel *));
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static void kd_rom_intr __P((void *));
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static struct cons_channel prom_cons_channel;
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int
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kd_rom_iopen(cc)
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struct cons_channel *cc;
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{
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/* Poll for ROM input 4 times per second */
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callout_reset(&cc->cc_callout, hz / 4, kd_rom_intr, cc);
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return (0);
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}
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int
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kd_rom_iclose(cc)
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struct cons_channel *cc;
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{
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callout_stop(&cc->cc_callout);
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return (0);
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}
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/*
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* "Interrupt" routine for input through ROM vectors
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*/
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void
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kd_rom_intr(arg)
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void *arg;
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{
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struct cons_channel *cc = arg;
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int s, c;
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/* Re-schedule */
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callout_reset(&cc->cc_callout, hz / 4, kd_rom_intr, cc);
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s = spltty();
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while ((c = prom_peekchar()) >= 0)
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(*cc->cc_upstream)(c);
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splx(s);
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}
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/*****************************************************************/
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int prom_stdin_node;
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int prom_stdout_node;
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char prom_stdin_args[16];
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char prom_stdout_args[16];
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extern void prom_cnprobe __P((struct consdev *));
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static void prom_cninit __P((struct consdev *));
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static int prom_cngetc __P((dev_t));
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static void prom_cnputc __P((dev_t, int));
|
|
extern void prom_cnpollc __P((dev_t, int));
|
|
|
|
/*
|
|
* The console is set to this one initially,
|
|
* which lets us use the PROM until consinit()
|
|
* is called to select a real console.
|
|
*/
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|
struct consdev consdev_prom = {
|
|
prom_cnprobe,
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|
prom_cninit,
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|
prom_cngetc,
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|
prom_cnputc,
|
|
prom_cnpollc,
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|
NULL,
|
|
};
|
|
|
|
/*
|
|
* The console table pointer is statically initialized
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|
* to point to the PROM table, so that early calls to printf will work.
|
|
*/
|
|
struct consdev *cn_tab = &consdev_prom;
|
|
|
|
void
|
|
prom_cnprobe(cn)
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|
struct consdev *cn;
|
|
{
|
|
}
|
|
|
|
static void
|
|
prom_cninit(cn)
|
|
struct consdev *cn;
|
|
{
|
|
}
|
|
|
|
void
|
|
prom_cnpollc(dev, on)
|
|
dev_t dev;
|
|
int on;
|
|
{
|
|
|
|
if (on) {
|
|
/* Entering debugger. */
|
|
#if NFB > 0
|
|
fb_unblank();
|
|
#endif
|
|
} else {
|
|
/* Resuming kernel. */
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* PROM console input putchar.
|
|
*/
|
|
static int
|
|
prom_cngetc(dev)
|
|
dev_t dev;
|
|
{
|
|
int s, c;
|
|
|
|
s = splhigh();
|
|
c = prom_getchar();
|
|
splx(s);
|
|
return (c);
|
|
}
|
|
|
|
/*
|
|
* PROM console output putchar.
|
|
*/
|
|
static void
|
|
prom_cnputc(dev, c)
|
|
dev_t dev;
|
|
int c;
|
|
{
|
|
|
|
prom_putchar(c);
|
|
}
|
|
|
|
|
|
/*****************************************************************/
|
|
|
|
static void prom_get_device_args __P((const char *, char *, unsigned int));
|
|
|
|
void
|
|
prom_get_device_args(prop, args, sz)
|
|
const char *prop;
|
|
char *args;
|
|
unsigned int sz;
|
|
{
|
|
char *cp, buffer[128];
|
|
|
|
cp = PROM_getpropstringA(findroot(), (char *)prop, buffer, sizeof buffer);
|
|
|
|
/*
|
|
* Extract device-specific arguments from a PROM device path (if any)
|
|
*/
|
|
cp = buffer + strlen(buffer);
|
|
while (cp >= buffer) {
|
|
if (*cp == ':') {
|
|
strncpy(args, cp+1, sz);
|
|
break;
|
|
}
|
|
cp--;
|
|
}
|
|
}
|
|
|
|
/*
|
|
*
|
|
*/
|
|
void
|
|
consinit()
|
|
{
|
|
int inSource, outSink;
|
|
|
|
switch (prom_version()) {
|
|
case PROM_OLDMON:
|
|
case PROM_OBP_V0:
|
|
/* The stdio handles identify the device type */
|
|
inSource = prom_stdin();
|
|
outSink = prom_stdout();
|
|
break;
|
|
|
|
case PROM_OBP_V2:
|
|
case PROM_OBP_V3:
|
|
case PROM_OPENFIRM:
|
|
|
|
/* Save PROM arguments for device matching */
|
|
prom_get_device_args("stdin-path", prom_stdin_args,
|
|
sizeof(prom_stdin_args));
|
|
prom_get_device_args("stdout-path", prom_stdout_args,
|
|
sizeof(prom_stdout_args));
|
|
|
|
/*
|
|
* Translate the STDIO package instance (`ihandle') -- that
|
|
* the PROM has already opened for us -- to a device tree
|
|
* node (i.e. a `phandle').
|
|
*/
|
|
|
|
prom_stdin_node = prom_instance_to_package(prom_stdin());
|
|
if (prom_stdin_node == 0)
|
|
printf("consinit: cannot convert stdin ihandle\n");
|
|
|
|
prom_stdout_node = prom_instance_to_package(prom_stdout());
|
|
if (prom_stdout_node == 0) {
|
|
printf("consinit: cannot convert stdout ihandle\n");
|
|
break;
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/* Wire up /dev/console */
|
|
cn_tab->cn_dev = makedev(cdevsw_lookup_major(&kd_cdevsw), 0);
|
|
cn_tab->cn_pri = CN_INTERNAL;
|
|
|
|
/* Set up initial PROM input channel for /dev/console */
|
|
prom_cons_channel.cc_dev = NULL;
|
|
prom_cons_channel.cc_iopen = kd_rom_iopen;
|
|
prom_cons_channel.cc_iclose = kd_rom_iclose;
|
|
cons_attach_input(&prom_cons_channel, cn_tab);
|
|
|
|
#ifdef KGDB
|
|
zs_kgdb_init(); /* XXX */
|
|
#endif
|
|
}
|