224 lines
5.2 KiB
C
224 lines
5.2 KiB
C
/* $NetBSD: consinit.c,v 1.17 2004/03/21 15:08:24 pk Exp $ */
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/*-
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* Copyright (c) 1999 Eduardo E. Horvath
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* All rights reserved.
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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. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* 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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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: consinit.c,v 1.17 2004/03/21 15:08:24 pk Exp $");
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#include "opt_ddb.h"
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#include "pcons.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/conf.h>
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#include <sys/device.h>
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#include <sys/file.h>
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#include <sys/ioctl.h>
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#include <sys/kernel.h>
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#include <sys/proc.h>
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#include <sys/tty.h>
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#include <sys/time.h>
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#include <sys/syslog.h>
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#include <machine/autoconf.h>
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#include <machine/openfirm.h>
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#include <machine/bsd_openprom.h>
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#include <machine/cpu.h>
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#include <machine/eeprom.h>
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#include <machine/psl.h>
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#include <machine/z8530var.h>
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#include <machine/sparc64.h>
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#include <dev/cons.h>
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#include <sparc64/dev/cons.h>
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static void prom_cnprobe __P((struct consdev *));
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static void prom_cninit __P((struct consdev *));
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int prom_cngetc __P((dev_t));
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static void prom_cnputc __P((dev_t, int));
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static void prom_cnpollc __P((dev_t, int));
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static void prom_cnputc __P((dev_t, int));
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/*
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* The console is set to this one initially,
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* which lets us use the PROM until consinit()
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* is called to select a real console.
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*/
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struct consdev consdev_prom = {
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prom_cnprobe,
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prom_cninit,
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prom_cngetc,
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prom_cnputc,
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prom_cnpollc,
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NULL,
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};
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/*
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* The console table pointer is statically initialized
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* to point to the PROM (output only) table, so that
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* early calls to printf will work.
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*/
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struct consdev *cn_tab = &consdev_prom;
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void
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prom_cnprobe(cd)
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struct consdev *cd;
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{
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#if NPCONS > 0
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int maj;
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extern const struct cdevsw pcons_cdevsw;
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maj = cdevsw_lookup_major(&pcons_cdevsw);
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cd->cn_dev = makedev(maj, 0);
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cd->cn_pri = CN_INTERNAL;
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#endif
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}
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int
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prom_cngetc(dev)
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dev_t dev;
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{
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unsigned char ch = '\0';
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int l;
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#ifdef DDB
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static int nplus = 0;
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#endif
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while ((l = prom_read(prom_stdin(), &ch, 1)) != 1)
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/* void */;
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#ifdef DDB
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if (ch == '+') {
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if (nplus++ > 3) Debugger();
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} else nplus = 0;
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#endif
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if (ch == '\r')
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ch = '\n';
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return ch;
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}
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static void
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prom_cninit(cn)
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struct consdev *cn;
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{
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}
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/*
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* PROM console output putchar.
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*/
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static void
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prom_cnputc(dev, c)
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dev_t dev;
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int c;
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{
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int s;
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char c0 = (c & 0x7f);
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s = splhigh();
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prom_write(prom_stdout(), &c0, 1);
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splx(s);
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}
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void
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prom_cnpollc(dev, on)
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dev_t dev;
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int on;
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{
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if (on) {
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/* Entering debugger. */
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#if NFB > 0
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fb_unblank();
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#endif
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} else {
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/* Resuming kernel. */
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}
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#if NPCONS > 0
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pcons_cnpollc(dev, on);
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#endif
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}
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/*****************************************************************/
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#ifdef DEBUG
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#define DBPRINT(x) prom_printf x
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#else
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#define DBPRINT(x)
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#endif
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int prom_stdin_node;
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int prom_stdout_node;
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/*
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* This function replaces sys/dev/cninit.c
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* Determine which device is the console using
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* the PROM "input source" and "output sink".
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*/
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void
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consinit()
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{
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int chosen;
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char buffer[128];
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char *consname = "unknown";
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DBPRINT(("consinit()\r\n"));
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if (cn_tab != &consdev_prom)
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return;
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chosen = prom_finddevice("/chosen");
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if ((prom_stdin_node = prom_instance_to_package(prom_stdin())) == 0) {
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printf("WARNING: no PROM stdin\n");
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}
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DBPRINT(("stdin node = %x\r\n", prom_stdin_node));
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if ((prom_stdout_node = prom_instance_to_package(prom_stdout())) == 0)
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printf("WARNING: no PROM stdout\n");
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DBPRINT(("stdout package = %x\r\n", prom_stdout_node));
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DBPRINT(("buffer @ %p\r\n", buffer));
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if (prom_stdin_node != 0 &&
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(prom_getproplen(prom_stdin_node, "keyboard") >= 0)) {
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#if NKBD > 0
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printf("cninit: kdb/display not configured\n");
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#endif
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consname = "keyboard/display";
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} else if (prom_stdout_node != 0 &&
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(OF_instance_to_path(prom_stdin(), buffer, sizeof(buffer)) >= 0)) {
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consname = buffer;
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}
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printf("console is %s\n", consname);
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/* Initialize PROM console */
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(*cn_tab->cn_probe)(cn_tab);
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(*cn_tab->cn_init)(cn_tab);
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}
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