From e50fc72424a15a9eb260d7914c0ac63d657d0859 Mon Sep 17 00:00:00 2001
From: chuck <chuck@NetBSD.org>
Date: Fri, 5 Apr 1996 21:50:05 +0000
Subject: [PATCH] make netbsd/sparc boot on sun4 once again.    the sun4m
 changes introduced config lines for obio0 devices without addresses (thus
 cf->cf_loc[0] took the default value of -1).   we now ignore these entries on
 a sun4 since they could never be valid (eliminates a 'panic:alignment' fault
 at bootup).

---
 sys/arch/sparc/dev/obio.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/sys/arch/sparc/dev/obio.c b/sys/arch/sparc/dev/obio.c
index c97eeb9a76cd..30ce4e1c2fc6 100644
--- a/sys/arch/sparc/dev/obio.c
+++ b/sys/arch/sparc/dev/obio.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: obio.c,v 1.22 1996/03/31 22:28:38 pk Exp $	*/
+/*	$NetBSD: obio.c,v 1.23 1996/04/05 21:50:05 chuck Exp $	*/
 
 /*
  * Copyright (c) 1993, 1994 Theo de Raadt
@@ -295,6 +295,13 @@ busattach(parent, child, args, bustype)
 	caddr_t tmp;
 
 	if (bustype == BUS_OBIO && CPU_ISSUN4) {
+
+		/*
+		 * avoid sun4m entries which don't have valid PA's.
+		 * no point in even probing them. 
+		 */
+		if (cf->cf_loc[0] == -1) return 0;
+
 		/*
 		 * On the 4/100 obio addresses must be mapped at
 		 * 0x0YYYYYYY, but alias higher up (we avoid the