125 lines
2.4 KiB
C
125 lines
2.4 KiB
C
/* $FreeBSD$
|
|
/* $NetBSD: prom.c,v 1.3 1997/09/06 14:03:58 drochner Exp $ */
|
|
|
|
/*
|
|
* Mach Operating System
|
|
* Copyright (c) 1992 Carnegie Mellon University
|
|
* All Rights Reserved.
|
|
*
|
|
* Permission to use, copy, modify and distribute this software and its
|
|
* documentation is hereby granted, provided that both the copyright
|
|
* notice and this permission notice appear in all copies of the
|
|
* software, derivative works or modified versions, and any portions
|
|
* thereof, and that both notices appear in supporting documentation.
|
|
*
|
|
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
|
|
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
|
|
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
|
|
*
|
|
* Carnegie Mellon requests users of this software to return to
|
|
*
|
|
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
|
|
* School of Computer Science
|
|
* Carnegie Mellon University
|
|
* Pittsburgh PA 15213-3890
|
|
*
|
|
* any improvements or extensions that they make and grant Carnegie Mellon
|
|
* the rights to redistribute these changes.
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include "bootstrap.h"
|
|
#include "openfirm.h"
|
|
|
|
int console;
|
|
|
|
static void ofw_cons_probe(struct console *cp);
|
|
static int ofw_cons_init(int);
|
|
void ofw_cons_putchar(int);
|
|
int ofw_cons_getchar(void);
|
|
int ofw_cons_poll(void);
|
|
|
|
static ihandle_t stdin;
|
|
static ihandle_t stdout;
|
|
|
|
struct console ofwconsole = {
|
|
"ofw",
|
|
"OpenFirmware console",
|
|
0,
|
|
ofw_cons_probe,
|
|
ofw_cons_init,
|
|
ofw_cons_putchar,
|
|
ofw_cons_getchar,
|
|
ofw_cons_poll,
|
|
};
|
|
|
|
static void
|
|
ofw_cons_probe(struct console *cp)
|
|
{
|
|
phandle_t chosen;
|
|
|
|
if ((chosen = OF_finddevice("/chosen")) == -1)
|
|
OF_exit();
|
|
OF_getprop(chosen, "stdin", &stdin, sizeof(stdin));
|
|
OF_getprop(chosen, "stdout", &stdout, sizeof(stdout));
|
|
cp->c_flags |= C_PRESENTIN|C_PRESENTOUT;
|
|
}
|
|
|
|
static int
|
|
ofw_cons_init(int arg)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
ofw_cons_putchar(int c)
|
|
{
|
|
char cbuf;
|
|
|
|
if (c == '\n') {
|
|
cbuf = '\r';
|
|
OF_write(stdout, &cbuf, 1);
|
|
}
|
|
|
|
cbuf = c;
|
|
OF_write(stdout, &cbuf, 1);
|
|
}
|
|
|
|
static int saved_char = -1;
|
|
|
|
int
|
|
ofw_cons_getchar()
|
|
{
|
|
unsigned char ch = '\0';
|
|
int l;
|
|
|
|
if (saved_char != -1) {
|
|
l = saved_char;
|
|
saved_char = -1;
|
|
return l;
|
|
}
|
|
|
|
while ((l = OF_read(stdin, &ch, 1)) != 1)
|
|
if (l != -2 && l != 0)
|
|
return -1;
|
|
return ch;
|
|
}
|
|
|
|
int
|
|
ofw_cons_poll()
|
|
{
|
|
unsigned char ch;
|
|
int l;
|
|
|
|
if (saved_char != -1)
|
|
return 1;
|
|
|
|
if (OF_read(stdin, &ch, 1) != 0) {
|
|
saved_char = ch;
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|