From e867e6e73fcf90e38b2426dbad2002e32b43faf5 Mon Sep 17 00:00:00 2001
From: briggs <briggs@openbsd.org>
Date: Sat, 5 Apr 1997 16:22:06 +0000
Subject: [PATCH] Implement a bus_space_bad_addr() function to aid in some
 device probing with the bus_space universe.

---
 sys/arch/mac68k/include/bus.h    |  5 ++++-
 sys/arch/mac68k/mac68k/machdep.c | 38 +++++++++++++++++++++++++++++++-
 2 files changed, 41 insertions(+), 2 deletions(-)

diff --git a/sys/arch/mac68k/include/bus.h b/sys/arch/mac68k/include/bus.h
index 684e193fe47..0ae55d75867 100644
--- a/sys/arch/mac68k/include/bus.h
+++ b/sys/arch/mac68k/include/bus.h
@@ -1,4 +1,4 @@
-/*      $OpenBSD: bus.h,v 1.1 1997/02/26 05:38:12 gene Exp $ */
+/*      $OpenBSD: bus.h,v 1.2 1997/04/05 16:22:06 briggs Exp $ */
 /*	$NetBSD: bus.h,v 1.6 1997/02/24 05:55:14 scottr Exp $	*/
 
 /*
@@ -52,6 +52,7 @@ typedef u_long bus_size_t;
 typedef int	bus_space_tag_t;
 typedef u_long	bus_space_handle_t;
 
+/* in machdep.c */
 int	bus_space_map __P((bus_space_tag_t, bus_addr_t, bus_size_t,
 				int, bus_space_handle_t *));
 void	bus_space_unmap __P((bus_space_tag_t, bus_space_handle_t,
@@ -65,6 +66,8 @@ int	bus_space_alloc __P((bus_space_tag_t t, bus_addr_t rstart,
 	    bus_space_handle_t *bshp));
 void	bus_space_free __P((bus_space_tag_t t, bus_space_handle_t bsh,
 	    bus_size_t size));
+int	bus_space_bad_addr __P((bus_space_tag_t tag, bus_space_handle_t hand,
+				bus_size_t offset, int byte_size));
 
 /*
  *	u_intN_t bus_space_read_N __P((bus_space_tag_t tag,
diff --git a/sys/arch/mac68k/mac68k/machdep.c b/sys/arch/mac68k/mac68k/machdep.c
index ee99de35e36..99ee8550463 100644
--- a/sys/arch/mac68k/mac68k/machdep.c
+++ b/sys/arch/mac68k/mac68k/machdep.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: machdep.c,v 1.35 1997/04/05 15:29:10 briggs Exp $	*/
+/*	$OpenBSD: machdep.c,v 1.36 1997/04/05 16:22:07 briggs Exp $	*/
 /*	$NetBSD: machdep.c,v 1.134 1997/02/14 06:15:30 scottr Exp $	*/
 
 /*
@@ -883,6 +883,42 @@ int    *nofault;
 
 int badaddr __P((caddr_t));
 
+int
+bus_space_bad_addr(t, h, o, sz)
+	bus_space_tag_t		t;
+	bus_space_handle_t	h;
+	bus_size_t		o;
+	int			sz;
+{
+	register int i;
+	label_t faultbuf;
+
+#ifdef lint
+	i = *addr;
+	if (i)
+		return (0);
+#endif
+	nofault = (int *) &faultbuf;
+	if (setjmp((label_t *) nofault)) {
+		nofault = (int *) 0;
+		return (1);
+	}
+	switch (sz) {
+	default:
+	case 1:
+		i = bus_space_read_1(t, h, o);
+		break;
+	case 2:
+		i = bus_space_read_2(t, h, o);
+		break;
+	case 4:
+		i = bus_space_read_4(t, h, o);
+		break;
+	}
+	nofault = (int *) 0;
+	return (0);
+}
+
 int
 badaddr(addr)
 	register caddr_t addr;
-- 
2.20.1