NetBSD/sys/arch/arm32/rc7500/rc7500_prom.c

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/* $NetBSD: rc7500_prom.c,v 1.2 1997/10/14 10:49:53 mark Exp $ */
/*
* Copyright (c) 1992, 1994, 1995 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/param.h>
#include <arm32/dev/rc7500_prom.h>
#include <dev/cons.h>
/* XXX this is to fake out the console routines, while booting. */
void promcnputc __P((dev_t, int));
int promcngetc __P((dev_t));
struct consdev promcons = { NULL, NULL, promcngetc, promcnputc,
nullcnpollc, makedev(23,0), 1 };
void
init_prom_interface()
{
/* XXX fake out the console routines, for now */
cn_tab = &promcons;
}
/*
* promcnputc:
*
* Remap char before passing off to prom.
*
* Prom only takes 32 bit addresses. Copy char somewhere prom can
* find it. This routine will stop working after pmap_rid_of_console
* is called in alpha_init. This is due to the hard coded address
* of the console area.
*/
void
promcnputc(dev, c)
dev_t dev;
int c;
{
prom_putchar(c);
}
/*
* promcngetc:
*
* Wait for the prom to get a real char and pass it back.
*/
int
promcngetc(dev)
dev_t dev;
{
int ret;
for (;;) {
ret = prom_getchar();
if (ret != -1)
return(ret);
}
}
/*
* promcnlookc:
*
* See if prom has a real char and pass it back.
*/
int
promcnlookc(dev, cp)
dev_t dev;
char *cp;
{
int ret;
ret = prom_getchar();
if (ret != -1) {
*cp = ret;
return 1;
} else
return 0;
}