[src/trunk]: src/sys/arch/powerpc/powerpc When mapping a page with BUS_SPACE_...

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

details:   https://anonhg.NetBSD.org/src/rev/f2f4eccfd253
branches:  trunk
changeset: 544240:f2f4eccfd253
user:      matt <matt%NetBSD.org@localhost>
date:      Sat Mar 15 07:25:20 2003 +0000

description:
When mapping a page with BUS_SPACE_NOCACHE, make sure to flush the
physical page from the data cache.

diffstat:

 sys/arch/powerpc/powerpc/bus_dma.c |  9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)

diffs (23 lines):

diff -r 3fa0b812a0d1 -r f2f4eccfd253 sys/arch/powerpc/powerpc/bus_dma.c
--- a/sys/arch/powerpc/powerpc/bus_dma.c        Sat Mar 15 07:24:37 2003 +0000
+++ b/sys/arch/powerpc/powerpc/bus_dma.c        Sat Mar 15 07:25:20 2003 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: bus_dma.c,v 1.6 2003/03/05 22:08:29 matt Exp $ */
+/*     $NetBSD: bus_dma.c,v 1.7 2003/03/15 07:25:20 matt Exp $ */
 
 /*-
  * Copyright (c) 1996, 1997, 1998 The NetBSD Foundation, Inc.
@@ -594,6 +594,13 @@
                    addr += NBPG, va += NBPG, size -= NBPG) {
                        if (size == 0)
                                panic("_bus_dmamem_map: size botch");
+                       /*
+                        * If we are mapping nocache, flush the page from
+                        * cache before we map it.
+                        */
+                       if (flags & BUS_DMA_NOCACHE)
+                               dcbf(addr, NBPG,
+                                   curcpu()->ci_ci.dcache_line_size);
                        pmap_kenter_pa(va, addr,
                            VM_PROT_READ | VM_PROT_WRITE |
                            PMAP_WIRED |