From: Greg Ungerer <gerg@xxxxxxxxxxx>
The ColdFire MMU has separate read and write bits, unlike the m68k
MMU's which have a single read-only bit.
We need to make sure we have the read and write bits in the page
table entry for ioremapped pages for ColdFire targets.
Signed-off-by: Greg Ungerer <gerg@xxxxxxxxxxx>
Acked-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Acked-by: Matt Waddel <mwaddel@xxxxxxxxx>
Acked-by: Kurt Mahan <kmahan@xxxxxxxxxxxx>
---
arch/m68k/mm/kmap.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/arch/m68k/mm/kmap.c b/arch/m68k/mm/kmap.c
index 6934584..4d08f98 100644
--- a/arch/m68k/mm/kmap.c
+++ b/arch/m68k/mm/kmap.c
@@ -172,6 +172,10 @@ void __iomem *__ioremap(unsigned long physaddr, unsigned long size, int cachefla
}
} else {
physaddr |= (_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_DIRTY);
+#ifdef CONFIG_COLDFIRE
+ /* ColdFire has separate read/write bits, not on by default */
+ physaddr |= _PAGE_READWRITE;
+#endif
switch (cacheflag) {
case IOMAP_NOCACHE_SER:
case IOMAP_NOCACHE_NONSER:
--
1.7.0.4
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