7c4cd2bb56
had a few bugs fixed that let the problem slip in, and since bootxx's Makefile now goes out of its way to satisfy installboot's undocumented and totally unreasonable assumptions about the bootxx file it's operating on. No point in fixing the assumptions, because sooner rather than later this incarnation of installboot is going to die.
137 lines
2.7 KiB
C
137 lines
2.7 KiB
C
/* $NetBSD: prom.c,v 1.10 1999/04/02 03:11:57 cgd Exp $ */
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/*
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* Mach Operating System
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* Copyright (c) 1992 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/types.h>
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#include <machine/prom.h>
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#include <machine/rpb.h>
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#include "common.h"
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int console;
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#if !defined(NO_GETCHAR) || !defined(NO_PUTCHAR_HALT)
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static int test_getchar(int *);
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#endif
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static void putonechar(int c);
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void
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init_prom_calls()
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{
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extern struct prom_vec prom_dispatch_v;
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struct rpb *r;
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struct crb *c;
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char buf[4];
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r = (struct rpb *)HWRPB_ADDR;
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c = (struct crb *)((u_int8_t *)r + r->rpb_crb_off);
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prom_dispatch_v.routine_arg = c->crb_v_dispatch;
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prom_dispatch_v.routine = c->crb_v_dispatch->entry_va;
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/* Look for console tty. */
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prom_getenv(PROM_E_TTY_DEV, buf, 4);
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console = buf[0] - '0';
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}
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#if !defined(NO_GETCHAR) || !defined(NO_PUTCHAR_HALT)
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static int
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test_getchar(xc)
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int *xc;
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{
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prom_return_t ret;
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ret.bits = prom_dispatch(PROM_R_GETC, console);
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*xc = ret.u.retval;
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return ret.u.status == 0 || ret.u.status == 1;
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}
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#endif
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#if !defined(NO_GETCHAR)
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int
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getchar()
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{
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int c;
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for (;;) {
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if (test_getchar(&c)) {
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if (c == 3)
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halt();
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return c;
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}
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}
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}
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#endif
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static void
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putonechar(c)
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int c;
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{
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prom_return_t ret;
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char cbuf = c;
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do {
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ret.bits = prom_dispatch(PROM_R_PUTS, console, &cbuf, 1);
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} while ((ret.u.retval & 1) == 0);
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}
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void
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putchar(c)
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int c;
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{
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#if !defined(NO_PUTCHAR_HALT)
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int typed_c;
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#endif
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if (c == '\r' || c == '\n') {
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putonechar('\r');
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c = '\n';
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}
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putonechar(c);
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#if !defined(NO_PUTCHAR_HALT)
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if (test_getchar(&typed_c))
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if (typed_c == 3)
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halt();
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#endif
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}
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int
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prom_getenv(id, buf, len)
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int id, len;
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char *buf;
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{
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prom_return_t ret;
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ret.bits = prom_dispatch(PROM_R_GETENV, id, buf, len-1);
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if (ret.u.status & 0x4)
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ret.u.retval = 0;
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buf[ret.u.retval] = '\0';
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return (ret.u.retval);
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}
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