From 2ea7da9edd9353c391a1a5f94bac1989b28d61af Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Tue, 10 Oct 2000 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 2000-10-10

---
 bitsy/l.s    | 12 +++++++++++-
 bitsy/main.c |  1 +
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/bitsy/l.s b/bitsy/l.s
index bfdc4e6d1dc996f3b9b68a1f25139bb92ca58825..05d570aa4e6ef81de225779ba49a3e5c23dae9fc 100644
--- a/bitsy/l.s
+++ b/bitsy/l.s
@@ -56,7 +56,17 @@ TEXT flushdcache(SB), $-4
 
 /* flush i and d caches */
 TEXT flushcache(SB), $-4
+	/* write back any dirty data */
+	MOVW	$0xe0000000,R0
+	ADD	$(8*1024),R0,R1
+_wbloop:
+	MOVW.W	32(R0),R2
+	CMP	R0,R1
+	BNE	_wbloop
+	
+	/* flush cache contents */
 	MCR	CpMMU, 0, R0, C(CpCacheFlush), C(0x7), 0
+
 	/* drain prefetch */
 	MOVW	R0,R0						
 	MOVW	R0,R0
@@ -225,7 +235,7 @@ _vswitch:
 
 	/* interupted code kernel or user? */
 	AND.S	$0xf, R1, R4
-	B.EQ	_userexcep
+	BEQ	_userexcep
 
 	/* here for trap from SVC mode */
 	MOVM.DB.W [R0-R2], (R13)	/* set ureg->{type, psr, pc}; r13 points to ureg->type  */
diff --git a/bitsy/main.c b/bitsy/main.c
index 315655b40adcd51564ddb78cc832eeb590325ed2..e48f06796f81c61cff247bfe2e6685530d24e401 100644
--- a/bitsy/main.c
+++ b/bitsy/main.c
@@ -48,6 +48,7 @@ exit(int ispanic)
 	USED(ispanic);
 	delay(1000);
 
+	iprint("it's a wonderful day to die\n");
 	mmudisable();
 	f = nil;
 	(*f)();