640 lines
14 KiB
C
640 lines
14 KiB
C
/* $NetBSD: cons.c,v 1.1.1.1 1998/06/20 04:58:51 eeh Exp $ */
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* 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, Lawrence Berkeley Laboratory.
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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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* @(#)cons.c 8.3 (Berkeley) 12/14/93
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*/
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/*
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* Console (indirect) driver.
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*/
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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/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 <dev/cons.h>
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#include <machine/openfirm.h>
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#include <machine/bsd_openprom.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/sparc64.h>
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#include <machine/autoconf.h>
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#include <machine/conf.h>
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#include "zs.h"
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struct tty *constty = 0; /* virtual console output device */
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struct tty *fbconstty = 0; /* tty structure for frame buffer console */
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int rom_console_input; /* when set, hardclock calls cnrom() */
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/* PROM console descriptors */
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#define printf prom_printf /* Make sure we can see what's printed in here */
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#define panic prom_printf
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int cons_ocount; /* output byte count */
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/*
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* The output driver may munge the minor number in cons.t_dev.
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*/
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struct tty cons; /* rom console tty device */
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static void (*fcnstop) __P((struct tty *, int));
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static void cnstart __P((struct tty *));
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void cnstop __P((struct tty *, int));
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static void cnfbstart __P((struct tty *));
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static void cnfbstop __P((struct tty *, int));
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static void cnfbdma __P((void *));
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static struct tty *xxcntty __P((dev_t));
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extern char char_type[];
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/*XXX*/
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static struct tty *
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xxcntty(dev_t dev)
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{
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return &cons;
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}
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void
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consinit()
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{
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register struct tty *tp = &cons;
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register int in, out;
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register int node,fd;
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char buffer[128];
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register char *cp;
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extern int fbnode;
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/* Done already? */
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if (tp->t_param) return;
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/*XXX*/ cdevsw[0].d_tty = xxcntty;
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tp->t_dev = makedev(0, 0); /* /dev/console */
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tp->t_ispeed = tp->t_ospeed = TTYDEF_SPEED;
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tp->t_param = (int (*)(struct tty *, struct termios *))nullop;
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/* We need to probe the PROM device tree */
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in = out = -1;
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prom_printf("setting up stdin\r\n");
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node = OF_instance_to_package(OF_stdin());
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prom_printf("stdin package = %x\r\n", node);
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if (OF_getproplen(node,"keyboard") >= 0) {
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in = PROMDEV_KBD;
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goto setup_output;
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}
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if (strcmp(getpropstring(node,"device_type"),"serial") != 0) {
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/* not a serial, not keyboard. what is it?!? */
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in = -1;
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goto setup_output;
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}
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/*
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* At this point we assume the device path is in the form
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* ....device@x,y:a for ttya and ...device@x,y:b for ttyb.
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* If it isn't, we defer to the ROM
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*/
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if(OF_instance_to_path(OF_stdin(), buffer, sizeof(buffer)) <= 0) {
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printf("consinit: bogus stdin path.\n");
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goto setup_output;
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}
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cp = buffer;
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while (*cp)
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cp++;
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cp -= 2;
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#ifdef DEBUG
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if (cp < buffer)
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panic("consinit: bad stdin path %s",buffer);
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#endif
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/* XXX: only allows tty's a->z, assumes PROMDEV_TTYx contig */
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if (cp[0]==':' && cp[1] >= 'a' && cp[1] <= 'z')
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in = PROMDEV_TTYA + (cp[1] - 'a');
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/* else use rom */
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setup_output:
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prom_printf("setting up stdout\r\n");
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node = OF_instance_to_package(OF_stdout());
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prom_printf("stdout package = %x\r\n", node);
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if (strcmp(getpropstring(node,"device_type"),"display") == 0) {
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/* frame buffer output */
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out = PROMDEV_SCREEN;
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fbnode = node;
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} else if (strcmp(getpropstring(node,"device_type"), "serial")
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!= 0) {
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/* not screen, not serial. Whatzit? */
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out = -1;
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} else { /* serial console. which? */
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/*
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* At this point we assume the device path is in the
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* form:
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* ....device@x,y:a for ttya, etc.
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* If it isn't, we defer to the ROM
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*/
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if(OF_instance_to_path(OF_stdout(), buffer, sizeof(buffer)) <= 0) {
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printf("consinit: bogus stdout path.\n");
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goto setup_output;
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}
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cp = buffer;
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while (*cp)
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cp++;
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cp -= 2;
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#ifdef DEBUG
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if (cp < buffer)
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panic("consinit: bad stdout path %s",buffer);
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#endif
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/* XXX: only allows tty's a->z, assumes PROMDEV_TTYx contig */
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if (cp[0]==':' && cp[1] >= 'a' && cp[1] <= 'z')
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out = PROMDEV_TTYA + (cp[1] - 'a');
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else out = -1;
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}
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setup_console:
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switch (in) {
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#if NZS > 0
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case PROMDEV_TTYA:
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zsconsole(tp, 0, 0, NULL);
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break;
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case PROMDEV_TTYB:
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zsconsole(tp, 1, 0, NULL);
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break;
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#endif
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case PROMDEV_KBD:
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/*
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* Tell the keyboard driver to direct ASCII input here.
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*/
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kbd_ascii(tp);
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break;
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default:
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rom_console_input = 1;
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printf("unknown console input source %d; using rom\n", in);
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break;
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}
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switch (out) {
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#if NZS > 0
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case PROMDEV_TTYA:
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zsconsole(tp, 0, 1, &fcnstop);
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break;
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case PROMDEV_TTYB:
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zsconsole(tp, 1, 1, &fcnstop);
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break;
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#endif
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case PROMDEV_SCREEN:
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fbconstty = tp;
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tp->t_oproc = cnfbstart;
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fcnstop = cnfbstop;
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break;
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default:
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printf("unknown console output sink %d; using rom\n", out);
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tp->t_oproc = cnstart;
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fcnstop = (void (*)(struct tty *, int))nullop;
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break;
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}
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}
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/* ARGSUSED */
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int
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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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register struct tty *tp = &cons;
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static int firstopen = 1;
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static int rows = 0, cols = 0;
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if (firstopen) {
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int i;
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char *prop;
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clalloc(&tp->t_rawq, 1024, 1);
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clalloc(&tp->t_canq, 1024, 1);
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/* output queue doesn't need quoting */
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clalloc(&tp->t_outq, 1024, 0);
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tty_attach(tp);
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/*
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* get the console struct winsize.
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*/
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if ((prop = getpropstring(optionsnode, "screen-#rows"))) {
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i = 0;
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while (*prop != '\0')
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i = i * 10 + *prop++ - '0';
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rows = (unsigned short)i;
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}
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if ((prop = getpropstring(optionsnode, "screen-#columns"))) {
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i = 0;
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while (*prop != '\0')
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i = i * 10 + *prop++ - '0';
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cols = (unsigned short)i;
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}
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firstopen = 0;
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}
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if ((tp->t_state & TS_ISOPEN) == 0) {
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/*
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* Leave baud rate alone!
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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_lflag = TTYDEF_LFLAG;
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tp->t_cflag = TTYDEF_CFLAG;
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tp->t_state = TS_ISOPEN | TS_CARR_ON;
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(void)(*tp->t_param)(tp, &tp->t_termios);
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ttsetwater(tp);
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tp->t_winsize.ws_row = rows;
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tp->t_winsize.ws_col = cols;
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} else if (tp->t_state & TS_XCLUDE && p->p_ucred->cr_uid != 0)
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return (EBUSY);
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return ((*linesw[tp->t_line].l_open)(dev, tp));
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}
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/* ARGSUSED */
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int
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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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register struct tty *tp = &cons;
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(*linesw[tp->t_line].l_close)(tp, flag);
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ttyclose(tp);
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return (0);
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}
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/* ARGSUSED */
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int
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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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int flag;
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{
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register struct tty *tp = &cons;
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return ((*linesw[tp->t_line].l_read)(tp, uio, flag));
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}
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/* ARGSUSED */
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int
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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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int flag;
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{
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register struct tty *tp;
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if ((tp = constty) == NULL ||
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(tp->t_state & (TS_CARR_ON|TS_ISOPEN)) != (TS_CARR_ON|TS_ISOPEN))
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tp = &cons;
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return ((*linesw[tp->t_line].l_write)(tp, uio, flag));
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}
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int
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cnioctl(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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register struct tty *tp;
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int error;
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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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tp = &cons;
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if ((error = linesw[tp->t_line].l_ioctl(tp, cmd, data, flag, p)) >= 0)
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return (error);
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if ((error = ttioctl(tp, cmd, data, flag, p)) >= 0)
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return (error);
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return (ENOTTY);
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}
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int
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cnpoll(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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return (ttpoll(makedev(major(dev), 0), events, p));
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}
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/*
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* The rest of this code is run only when we are using the ROM vectors.
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*/
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/*
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* Generic output. We just call putchar. (Very bad for performance.)
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*/
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static void
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cnstart(tp)
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register struct tty *tp;
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{
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register int c, s;
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s = spltty();
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if (tp->t_state & (TS_TIMEOUT | TS_TTSTOP)) {
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splx(s);
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return;
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}
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while (tp->t_outq.c_cc) {
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unsigned char c0;
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c = getc(&tp->t_outq);
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/*
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* *%&!*& ROM monitor console putchar is not reentrant!
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* splhigh/tty around it so as not to run so long with
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* clock interrupts blocked.
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*/
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c0 = c & 0177;
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(void) splhigh();
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OF_write(OF_stdout(), &c0, 1);
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(void) spltty();
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}
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if (tp->t_state & TS_ASLEEP) { /* can't happen? */
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tp->t_state &= ~TS_ASLEEP;
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wakeup((caddr_t)&tp->t_outq);
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}
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selwakeup(&tp->t_wsel);
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splx(s);
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}
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void
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cnstop(tp, flag)
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register struct tty *tp;
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int flag;
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{
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(*fcnstop)(tp, flag);
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}
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/*
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* Frame buffer output.
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* We use pseudo-DMA, via the ROM `write string' function, called from
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* software clock interrupts.
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*/
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static void
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cnfbstart(tp)
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register struct tty *tp;
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{
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register int s;
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#ifdef NOTDEF_DEBUG
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prom_printf("cnfbstart:start\r\n");
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#endif
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s = spltty(); /* paranoid: splsoftclock should suffice */
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if (tp->t_state & (TS_TIMEOUT | TS_BUSY | TS_TTSTOP)) {
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splx(s);
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#ifdef NOTDEF_DEBUG
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prom_printf("cnfbstart:busy state:%x\r\n", tp->t_state);
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#endif
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return;
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}
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/*
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* If there are sleepers, and output has drained below low
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* water mark, awaken.
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*/
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if (tp->t_outq.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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#ifdef NOTDEF_DEBUG
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prom_printf("cnfbstart: wakeup\r\n");
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#endif
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wakeup((caddr_t)&tp->t_outq);
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}
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#ifdef NOTDEF_DEBUG
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prom_printf("cnfbstart: selwakeup\r\n");
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#endif
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selwakeup(&tp->t_wsel);
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}
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if (tp->t_outq.c_cc) {
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tp->t_state |= TS_BUSY;
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if (s == 0) {
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(void) splsoftclock();
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#ifdef NOTDEF_DEBUG
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prom_printf("cnfbstart: cnfbdma\r\n");
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#endif
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cnfbdma((void *)tp);
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} else {
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#ifdef NOTDEF_DEBUG
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/* printspl = 1;*/
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prom_printf("cnfbstart: timeout\r\n");
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#endif
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timeout(cnfbdma, tp, 1);
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}
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}
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splx(s);
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}
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/*
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* Stop frame buffer output: just assert TS_FLUSH if necessary.
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*/
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static void
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cnfbstop(tp, flag)
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register struct tty *tp;
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int flag;
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{
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register int s = spltty(); /* paranoid */
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if ((tp->t_state & (TS_BUSY | TS_TTSTOP)) == TS_BUSY)
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tp->t_state |= TS_FLUSH;
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#ifdef NOTDEF_DEBUG
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prom_printf("cnfbstop\r\n");
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#endif
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splx(s);
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}
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/*
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* Do pseudo-dma (called from software interrupt).
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*/
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static void
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cnfbdma(tpaddr)
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void *tpaddr;
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{
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register struct tty *tp = tpaddr;
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register unsigned char *p, *q;
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register int n, c, s;
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s = spltty(); /* paranoid */
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if (tp->t_state & TS_FLUSH) {
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tp->t_state &= ~(TS_BUSY | TS_FLUSH);
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splx(s);
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#ifdef NOTDEF_DEBUG
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prom_printf("cnfbdma: flush\r\n");
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#endif
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} else {
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tp->t_state &= ~TS_BUSY;
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splx(s);
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p = tp->t_outq.c_cf;
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n = ndqb(&tp->t_outq, 0);
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for (q = p, c = n; --c >= 0; q++)
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if (*q & 0200) /* high bits seem to be bad */
|
|
*q &= ~0200;
|
|
#ifdef NOTDEF_DEBUG
|
|
prom_printf("cnfbdma: write\r\n");
|
|
#endif
|
|
OF_write(OF_stdout(), p, n);
|
|
ndflush(&tp->t_outq, n);
|
|
}
|
|
if (tp->t_line)
|
|
(*linesw[tp->t_line].l_start)(tp);
|
|
else
|
|
cnfbstart(tp);
|
|
}
|
|
|
|
/*
|
|
* The following is for rom console input. The rom will not call
|
|
* an `interrupt' routine on console input ready, so we must poll.
|
|
* This is all rather sad.
|
|
*/
|
|
volatile int cn_rxc = -1; /* XXX receive `silo' */
|
|
|
|
/* called from hardclock, which is above spltty, so no tty calls! */
|
|
int
|
|
cnrom()
|
|
{
|
|
unsigned char c0;
|
|
|
|
if (cn_rxc >= 0)
|
|
return (1);
|
|
if(OF_read(OF_stdin(), &c0, 1) <= 0)
|
|
return (0);
|
|
cn_rxc = c0;
|
|
return (1);
|
|
}
|
|
|
|
/* pseudo console software interrupt scheduled when cnrom() returns 1 */
|
|
void
|
|
cnrint()
|
|
{
|
|
register struct tty *tp;
|
|
register int c, s;
|
|
|
|
s = splclock();
|
|
c = cn_rxc;
|
|
cn_rxc = -1;
|
|
splx(s);
|
|
if (c < 0)
|
|
return;
|
|
tp = &cons;
|
|
if ((tp->t_cflag & CSIZE) == CS7) {
|
|
/* XXX this should be done elsewhere, if at all */
|
|
if (tp->t_cflag & PARENB)
|
|
if (tp->t_cflag & PARODD ?
|
|
(char_type[c & 0177] & 0200) == (c & 0200) :
|
|
(char_type[c & 0177] & 0200) != (c & 0200))
|
|
c |= TTY_PE;
|
|
c &= ~0200;
|
|
}
|
|
(*linesw[tp->t_line].l_rint)(c, tp);
|
|
}
|
|
|
|
int
|
|
cngetc()
|
|
{
|
|
register int s, c;
|
|
register int n = 0;
|
|
unsigned char c0;
|
|
s = splhigh();
|
|
while (n <= 0) {
|
|
n = OF_read(OF_stdin(), &c0, 1);
|
|
}
|
|
splx(s);
|
|
c = c0;
|
|
if (c == '\r')
|
|
c = '\n';
|
|
return (c);
|
|
}
|
|
|
|
void
|
|
cnputc(c)
|
|
register int c;
|
|
{
|
|
register int s;
|
|
unsigned char c0;
|
|
|
|
if (c == '\n')
|
|
cnputc('\r');
|
|
c0 = c;
|
|
s = splhigh();
|
|
OF_write(OF_stdout(), &c0, 1);
|
|
splx(s);
|
|
}
|
|
|
|
int swallow_zsintrs;
|
|
|
|
void
|
|
cnpollc(on)
|
|
int on;
|
|
{
|
|
/*
|
|
* Need to tell zs driver to acknowledge all interrupts or we get
|
|
* annoying spurious interrupt messages.
|
|
*/
|
|
|
|
if (on) swallow_zsintrs++;
|
|
else swallow_zsintrs--;
|
|
}
|