[src/trunk]: src/sys/sys add BUS_DMA_PREFETCHABLE flag for bus_dmamem_map(), ...

[macallan <macallan%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/08b356f3da55
branches:  trunk
changeset: 784629:08b356f3da55
user:      macallan <macallan%NetBSD.org@localhost>
date:      Mon Feb 04 13:18:35 2013 +0000

description:
add BUS_DMA_PREFETCHABLE flag for bus_dmamem_map(), analog to
BUS_SPACE_MAP_PREFETCHABLE

diffstat:

 sys/sys/bus_proto.h |  4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diffs (18 lines):

diff -r 185a669b27c7 -r 08b356f3da55 sys/sys/bus_proto.h
--- a/sys/sys/bus_proto.h       Mon Feb 04 11:02:32 2013 +0000
+++ b/sys/sys/bus_proto.h       Mon Feb 04 13:18:35 2013 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: bus_proto.h,v 1.6 2011/08/17 10:46:38 martin Exp $     */
+/*     $NetBSD: bus_proto.h,v 1.7 2013/02/04 13:18:35 macallan Exp $   */
 
 /*-
  * Copyright (c) 1996, 1997, 1998, 2001, 2007 The NetBSD Foundation, Inc.
@@ -319,6 +319,8 @@
 #define        BUS_DMA_READ            0x100   /* mapping is device -> memory only */
 #define        BUS_DMA_WRITE           0x200   /* mapping is memory -> device only */
 #define        BUS_DMA_NOCACHE         0x400   /* hint: map non-cached memory */
+#define        BUS_DMA_PREFETCHABLE    0x800   /* hint: map non-cached but allow 
+                                        * things like write combining */
 
 /* Operations performed by bus_dmamap_sync(). */
 #define        BUS_DMASYNC_PREREAD     0x01    /* pre-read synchronization */