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From: Konstantin Belousov <kib@FreeBSD.org>
Date: Tue, 17 Jul 2012 19:14:12 +0000 (UTC)
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Subject: svn commit: r238556 - stable/8/sys/dev/fb
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Author: kib
Date: Tue Jul 17 19:14:12 2012
New Revision: 238556
URL: http://svn.freebsd.org/changeset/base/238556

Log:
  MFC r237203,r237223 (by phk):
  Fix writes to the video memory of the VGA to always use half-word sized
  writes.
  
  Approved by:    phk

Modified:
  stable/8/sys/dev/fb/fbreg.h
Directory Properties:
  stable/8/sys/   (props changed)

Modified: stable/8/sys/dev/fb/fbreg.h
==============================================================================
--- stable/8/sys/dev/fb/fbreg.h	Tue Jul 17 19:00:46 2012	(r238555)
+++ stable/8/sys/dev/fb/fbreg.h	Tue Jul 17 19:14:12 2012	(r238556)
@@ -35,9 +35,17 @@
 
 /* some macros */
 #if defined(__amd64__) || defined(__i386__)
-#define bcopy_io(s, d, c)	bcopy((void *)(s), (void *)(d), (c))
-#define bcopy_toio(s, d, c)	bcopy((void *)(s), (void *)(d), (c))
-#define bcopy_fromio(s, d, c)	bcopy((void *)(s), (void *)(d), (c))
+
+static __inline void
+copyw(uint16_t *src, uint16_t *dst, size_t size)
+{
+	size >>= 1;
+	while (size--)
+		*dst++ = *src++;
+}
+#define bcopy_io(s, d, c)	copyw((void*)(s), (void*)(d), (c))
+#define bcopy_toio(s, d, c)	copyw((void*)(s), (void*)(d), (c))
+#define bcopy_fromio(s, d, c)	copyw((void*)(s), (void*)(d), (c))
 #define bzero_io(d, c)		bzero((void *)(d), (c))
 #define fill_io(p, d, c)	fill((p), (void *)(d), (c))
 #define fillw_io(p, d, c)	fillw((p), (void *)(d), (c))