NetBSD-5.0.2/sys/arch/sun2/dev/consinit.c
/* $NetBSD: consinit.c,v 1.6 2005/12/11 12:19:16 christos Exp $ */
/*-
* Copyright (c) 2001 Matthew Fredette
* Copyright (c) 1999 Eduardo E. Horvath
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: consinit.c,v 1.6 2005/12/11 12:19:16 christos Exp $");
#include "opt_ddb.h"
#include "opt_kgdb.h"
#include "pcons.h"
#include "kbd.h"
#include "zs.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/tty.h>
#include <sys/time.h>
#include <sys/syslog.h>
#include <sys/kgdb.h>
#include <machine/autoconf.h>
#include <machine/promlib.h>
#include <machine/cpu.h>
#include <machine/eeprom.h>
#include <machine/psl.h>
#include <machine/z8530var.h>
#include <dev/cons.h>
#include <sun2/dev/cons.h>
static void prom_cnprobe(struct consdev *);
static void prom_cninit(struct consdev *);
int prom_cngetc(dev_t);
static void prom_cnputc(dev_t, int);
static void prom_cnpollc(dev_t, int);
static void prom_cnputc(dev_t, int);
#ifdef PROM_OBP_V2
/*
* The following several variables are related to
* the configuration process, and are used in initializing
* the machine.
*/
int prom_stdin_node; /* node ID of ROM's console input device */
int prom_stdout_node; /* node ID of ROM's console output device */
char prom_stdin_args[16];
char prom_stdout_args[16];
#endif /* PROM_OBP_V2 */
/*
* The console is set to this one initially,
* which lets us use the PROM until consinit()
* is called to select a real console.
*/
struct consdev consdev_prom = {
prom_cnprobe,
prom_cninit,
prom_cngetc,
prom_cnputc,
prom_cnpollc,
NULL,
};
/*
* The console table pointer is statically initialized
* to point to the PROM (output only) table, so that
* early calls to printf will work.
*/
struct consdev *cn_tab = &consdev_prom;
void
prom_cnprobe(struct consdev *cd)
{
#if NPCONS > 0
extern const struct cdevsw pcons_cdevsw;
cd->cn_dev = makedev(cdevsw_lookup_major(&pcons_cdevsw), 0);
cd->cn_pri = CN_INTERNAL;
#endif
}
int
prom_cngetc(dev_t dev)
{
int ch;
#ifdef DDB
static int nplus = 0;
#endif
ch = prom_getchar();
#ifdef DDB
if (ch == '+') {
if (nplus++ > 3) Debugger();
} else nplus = 0;
#endif
return ch;
}
static void
prom_cninit(struct consdev *cn)
{
}
/*
* PROM console output putchar.
*/
static void
prom_cnputc(dev_t dev, int c)
{
int s;
s = splhigh();
prom_putchar(c);
splx(s);
}
void
prom_cnpollc(dev_t dev, int on)
{
if (on) {
/* Entering debugger. */
#if NFB > 0
fb_unblank();
#endif
} else {
/* Resuming kernel. */
}
#if NPCONS > 0
pcons_cnpollc(dev, on);
#endif
}
/*****************************************************************/
#ifdef DEBUG
#define DBPRINT(x) prom_printf x
#else
#define DBPRINT(x)
#endif
#ifdef notyet /* PROM_OBP_V2 */
void
prom_get_device_args(const char *prop, char *dev, unsigned int dev_sz,
char *args, unsigned int args_sz)
{
char *cp, buffer[128];
getpropstringA(prom_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, args_sz);
*cp = '\0';
strncpy(dev, buffer, dev_sz);
break;
}
cp--;
}
}
#endif /* PROM_OBP_V2 */
/*
* This function replaces sys/dev/cninit.c
* Determine which device is the console using
* the PROM "input source" and "output sink".
*/
void
consinit(void)
{
#ifdef notyet /* PROM_OBP_V2 */
char buffer[128];
#endif /* PROM_OBP_V2 */
const char *consname = "unknown";
#if KGDB
#if NZS > 0
extern const struct cdevsw zstty_cdevsw;
#endif
#endif
DBPRINT(("consinit()\r\n"));
if (cn_tab != &consdev_prom) return;
switch(prom_version()) {
#ifdef PROM_OLDMON
case PROM_OLDMON:
case PROM_OBP_V0:
switch(prom_stdin()) {
case PROMDEV_KBD:
consname = "keyboard/display";
break;
case PROMDEV_TTYA:
consname = "ttya";
break;
case PROMDEV_TTYB:
consname = "ttyb";
break;
}
break;
#endif /* PROM_OLDMON */
#ifdef notyet /* PROM_OBP_V2 */
case PROM_OBP_V2:
case PROM_OBP_V3:
case PROM_OPENFIRM:
/* Save PROM arguments for device matching */
prom_get_device_args("stdin-path",
buffer,
sizeof(buffer),
prom_stdin_args,
sizeof(prom_stdin_args));
prom_get_device_args("stdout-path",
buffer,
sizeof(buffer),
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').
*/
DBPRINT(("stdin instance = %x\r\n", prom_stdin()));
if ((prom_stdin_node = prom_instance_to_package(prom_stdin())) == 0) {
printf("WARNING: no PROM stdin\n");
}
DBPRINT(("stdin package = %x\r\n", prom_stdin_node));
DBPRINT(("stdout instance = %x\r\n", prom_stdout()));
if ((prom_stdout_node = prom_instance_to_package(prom_stdout())) == 0) {
printf("WARNING: no PROM stdout\n");
}
DBPRINT(("stdout package = %x\r\n", prom_stdout_node));
DBPRINT(("buffer @ %p\r\n", buffer));
if (prom_stdin_node && prom_node_has_property(prom_stdin_node, "keyboard") {
#if NKBD == 0
printf("cninit: kdb/display not configured\n");
#endif
consname = "keyboard/display";
} else if (prom_stdout_node)
consname = buffer;
#endif /* PROM_OBP_V2 */
}
printf("console is %s\n", consname);
/* Initialize PROM console */
(*cn_tab->cn_probe)(cn_tab);
(*cn_tab->cn_init)(cn_tab);
#ifdef KGDB
/* Set up KGDB */
#if NZS > 0
if (cdevsw_lookup(kgdb_dev) == &zstty_cdevsw)
zs_kgdb_init();
#endif /* NZS > 0 */
#endif /* KGDB */
}