[PATCH] ppc64: Big-endian I/O memory accessors.

I/O memory accessors. Big-endian version. For those busses/devices
that do export big-endian I/O memory.

Of notable relevance/reference:

   http://lwn.net/Articles/132804/
   http://ozlabs.org/pipermail/linuxppc-embedded/2005-August/019798.html
   http://ozlabs.org/pipermail/linuxppc-embedded/2005-August/019752.html

Signed-Off-By: Arthur Othieno <a.othieno@bluewin.ch>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 20 insertions, 0 deletions

diff --git a/arch/ppc64/kernel/iomap.c b/arch/ppc64/kernel/iomap.c
index 153cc8b0f136..95b0baf87522 100644
--- a/arch/ppc64/kernel/iomap.c
+++ b/arch/ppc64/kernel/iomap.c
@@ -22,13 +22,23 @@ unsigned int fastcall ioread16(void __iomem *addr)
 {
         return readw(addr);
 }
+unsigned int fastcall ioread16be(void __iomem *addr)
+{
+        return in_be16(addr);
+}
 unsigned int fastcall ioread32(void __iomem *addr)
 {
         return readl(addr);
 }
+unsigned int fastcall ioread32be(void __iomem *addr)
+{
+        return in_be32(addr);
+}
 EXPORT_SYMBOL(ioread8);
 EXPORT_SYMBOL(ioread16);
+EXPORT_SYMBOL(ioread16be);
 EXPORT_SYMBOL(ioread32);
+EXPORT_SYMBOL(ioread32be);
 
 void fastcall iowrite8(u8 val, void __iomem *addr)
 {
@@ -38,13 +48,23 @@ void fastcall iowrite16(u16 val, void __iomem *addr)
 {
         writew(val, addr);
 }
+void fastcall iowrite16be(u16 val, void __iomem *addr)
+{
+        out_be16(addr, val);
+}
 void fastcall iowrite32(u32 val, void __iomem *addr)
 {
         writel(val, addr);
 }
+void fastcall iowrite32be(u32 val, void __iomem *addr)
+{
+        out_be32(addr, val);
+}
 EXPORT_SYMBOL(iowrite8);
 EXPORT_SYMBOL(iowrite16);
+EXPORT_SYMBOL(iowrite16be);
 EXPORT_SYMBOL(iowrite32);
+EXPORT_SYMBOL(iowrite32be);
 
 /*
  * These are the "repeat read/write" functions. Note the