From 3af24d7d1fb78a6bb4e0aad5ec4e0607a6c6b4d2 Mon Sep 17 00:00:00 2001
From: briggs <briggs@openbsd.org>
Date: Tue, 8 Apr 1997 05:14:52 +0000
Subject: [PATCH] Fix from NetBSD: flush caches on trap 2 in SunOS emulation. 
 Comment on mac68k change by scottr attributes Gordon (Ross) on the change.

---
 sys/arch/atari/atari/trap.c     | 11 ++++++-----
 sys/arch/mvme68k/mvme68k/trap.c | 12 +++++++-----
 2 files changed, 13 insertions(+), 10 deletions(-)

diff --git a/sys/arch/atari/atari/trap.c b/sys/arch/atari/atari/trap.c
index 7d6858d1933..9055e0afb6c 100644
--- a/sys/arch/atari/atari/trap.c
+++ b/sys/arch/atari/atari/trap.c
@@ -615,15 +615,16 @@ trap(type, code, v, frame)
 	case T_TRAP15|T_USER:
 #ifdef COMPAT_SUNOS
 		/*
-		 * XXX This comment/code is not consistent XXX
-		 * SunOS seems to use Trap #2 for some obscure 
-		 * fpu operations.  So far, just ignore it, but
-		 * DONT trap on it.. 
+		 * SunOS uses Trap #2 for a "CPU cache flush"
+		 * Just flush the on-chip caches and return.
+		 * XXX - Too bad OpenBSD uses trap 2...
 		 */
 		if (p->p_emul == &emul_sunos) {
+			ICIA();
+			DCIU();
+			/* get out fast */
 			userret(p, frame.f_pc, sticks); 
 			return;
-		}
 #endif
 		frame.f_sr &= ~PSL_T;
 		i = SIGTRAP;
diff --git a/sys/arch/mvme68k/mvme68k/trap.c b/sys/arch/mvme68k/mvme68k/trap.c
index 9a4ed40be2d..7dfa8b2d7f5 100644
--- a/sys/arch/mvme68k/mvme68k/trap.c
+++ b/sys/arch/mvme68k/mvme68k/trap.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: trap.c,v 1.16 1997/03/31 00:24:16 downsj Exp $ */
+/*	$OpenBSD: trap.c,v 1.17 1997/04/08 05:14:52 briggs Exp $ */
 
 /*
  * Copyright (c) 1995 Theo de Raadt
@@ -475,12 +475,14 @@ copyfault:
 	case T_TRAP15|T_USER:	/* SUN user trace trap */
 #ifdef COMPAT_SUNOS
 		/*
-		 * XXX This comment/code is not consistent XXX
-		 * SunOS seems to use Trap #2 for some obscure
-		 * fpu operations.  So far, just ignore it, but
-		 * DONT trap on it..
+		 * SunOS uses Trap #2 for a "CPU cache flush"
+		 * Just flush the on-chip caches and return.
+		 * XXX - Too bad OpenBSD uses trap 2...
 		 */
 		if (p->p_emul == &emul_sunos) {
+			ICIA();
+			DCIU();
+			/* get out fast */
 			userret(p, &frame, sticks, v, 1);
 			return;
 		}
-- 
2.20.1