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/* $OpenBSD: prom.c,v 1.5 1997/01/24 19:58:07 niklas Exp $ */
/* $NetBSD: prom.c,v 1.2 1996/11/25 16:18:16 cgd 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 <machine/rpb.h>
#include <machine/prom.h>
int console;
void
init_prom_calls()
{
extern struct prom_vec prom_dispatch_v;
struct rpb *r;
struct crb *c;
char buf[4];
r = (struct rpb *)HWRPB_ADDR;
c = (struct crb *)((u_int8_t *)r + r->rpb_crb_off);
prom_dispatch_v.routine_arg = c->crb_v_dispatch;
prom_dispatch_v.routine = c->crb_v_dispatch->entry_va;
/* Look for console tty. */
prom_getenv(PROM_E_TTY_DEV, buf, 4);
console = buf[0] - '0';
}
int
getchar()
{
prom_return_t ret;
for (;;) {
ret.bits = prom_dispatch(PROM_R_GETC, console);
if (ret.u.status == 0 || ret.u.status == 1)
return (ret.u.retval);
}
}
void
putchar(c)
int c;
{
prom_return_t ret;
char cbuf;
if (c == '\r' || c == '\n') {
cbuf = '\r';
do {
ret.bits = prom_dispatch(PROM_R_PUTS, console,
&cbuf, 1);
} while ((ret.u.retval & 1) == 0);
cbuf = '\n';
} else
cbuf = c;
do {
ret.bits = prom_dispatch(PROM_R_PUTS, console, &cbuf, 1);
} while ((ret.u.retval & 1) == 0);
}
int
prom_getenv(id, buf, len)
int id, len;
char *buf;
{
prom_return_t ret;
ret.bits = prom_dispatch(PROM_R_GETENV, id, buf, len-1);
if (ret.u.status & 0x4)
ret.u.retval = 0;
buf[ret.u.retval] = '\0';
return (ret.u.retval);
}
int
prom_open(dev, len)
char *dev;
int len;
{
prom_return_t ret;
ret.bits = prom_dispatch(PROM_R_OPEN, dev, len);
if (ret.u.status & 0x4)
return (-1);
else
return (ret.u.retval);
}
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