102 lines
2.3 KiB
C
102 lines
2.3 KiB
C
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/* $NetBSD: rc7500_prom.c,v 1.1 1996/08/29 22:35:41 mark Exp $ */
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/*
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* Copyright (c) 1992, 1994, 1995 Carnegie Mellon University
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* All Rights Reserved.
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*
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* Permission to use, copy, modify and distribute this software and its
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* documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
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* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie Mellon
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* the rights to redistribute these changes.
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*/
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#include <sys/param.h>
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#include <arm32/dev/rc7500_prom.h>
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#include <dev/cons.h>
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/* XXX this is to fake out the console routines, while booting. */
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void promcnputc __P((dev_t, int));
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int promcngetc __P((dev_t));
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struct consdev promcons = { NULL, NULL, promcngetc, promcnputc,
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nullcnpollc, makedev(23,0), 1 };
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void
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init_prom_interface()
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{
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/* XXX fake out the console routines, for now */
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cn_tab = &promcons;
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}
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/*
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* promcnputc:
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*
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* Remap char before passing off to prom.
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*
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* Prom only takes 32 bit addresses. Copy char somewhere prom can
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* find it. This routine will stop working after pmap_rid_of_console
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* is called in alpha_init. This is due to the hard coded address
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* of the console area.
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*/
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void
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promcnputc(dev, c)
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dev_t dev;
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int c;
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{
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prom_putchar(c);
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}
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/*
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* promcngetc:
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*
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* Wait for the prom to get a real char and pass it back.
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*/
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int
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promcngetc(dev)
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dev_t dev;
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{
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int ret;
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for (;;) {
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ret = prom_getchar();
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if (ret != -1)
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return(ret);
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}
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}
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/*
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* promcnlookc:
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*
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* See if prom has a real char and pass it back.
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*/
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int
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promcnlookc(dev, cp)
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dev_t dev;
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char *cp;
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{
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int ret;
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ret = prom_getchar();
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if (ret != -1) {
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*cp = ret;
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return 1;
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} else
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return 0;
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}
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