[src/trunk]: src/sys/arch/arm/arm32 support BUS_DMA_PREFETCHABLE in bus_dmame...

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

details:   https://anonhg.NetBSD.org/src/rev/e1e57c6784dd
branches:  trunk
changeset: 784630:e1e57c6784dd
user:      macallan <macallan%NetBSD.org@localhost>
date:      Mon Feb 04 13:26:19 2013 +0000

description:
support BUS_DMA_PREFETCHABLE in bus_dmamem_mmap()

diffstat:

 sys/arch/arm/arm32/bus_dma.c |  12 +++++++++---
 1 files changed, 9 insertions(+), 3 deletions(-)

diffs (40 lines):

diff -r 08b356f3da55 -r e1e57c6784dd sys/arch/arm/arm32/bus_dma.c
--- a/sys/arch/arm/arm32/bus_dma.c      Mon Feb 04 13:18:35 2013 +0000
+++ b/sys/arch/arm/arm32/bus_dma.c      Mon Feb 04 13:26:19 2013 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: bus_dma.c,v 1.72 2013/01/28 08:03:13 skrll Exp $       */
+/*     $NetBSD: bus_dma.c,v 1.73 2013/02/04 13:26:19 macallan Exp $    */
 
 /*-
  * Copyright (c) 1996, 1997, 1998 The NetBSD Foundation, Inc.
@@ -33,7 +33,7 @@
 #define _ARM32_BUS_DMA_PRIVATE
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: bus_dma.c,v 1.72 2013/01/28 08:03:13 skrll Exp $");
+__KERNEL_RCSID(0, "$NetBSD: bus_dma.c,v 1.73 2013/02/04 13:26:19 macallan Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -1354,6 +1354,7 @@
 _bus_dmamem_mmap(bus_dma_tag_t t, bus_dma_segment_t *segs, int nsegs,
     off_t off, int prot, int flags)
 {
+       paddr_t map_flags;
        int i;
 
        for (i = 0; i < nsegs; i++) {
@@ -1371,7 +1372,12 @@
                        continue;
                }
 
-               return (arm_btop((u_long)segs[i].ds_addr + off));
+               map_flags = 0;
+               if (flags & BUS_DMA_PREFETCHABLE)
+                       map_flags |= ARM32_MMAP_WRITECOMBINE;
+
+               return (arm_btop((u_long)segs[i].ds_addr + off) | map_flags);
+               
        }
 
        /* Page not found. */