[PATCH] ppc32: Big-endian I/O memory accessors.

[Arthur Othieno]

From: Arthur Othieno <a.othieno at bluewin.ch>

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 at bluewin.ch>
---

Paulus, 

A similar patch for ppc64 made it upstream with your big ppc64 merge.
This one is still sitting in http://patchwork.ozlabs.org/linuxppc/
and didn't make it with the ppc32 equivalent. Thanks.


 include/asm-ppc/io.h |   20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff -uprN a/include/asm-ppc/io.h b/include/asm-ppc/io.h
--- a/include/asm-ppc/io.h	2005-08-21 17:49:44.000000000 -0400
+++ b/include/asm-ppc/io.h	2005-08-21 20:29:55.000000000 -0400
@@ -487,11 +487,21 @@ static inline unsigned int ioread16(void
 	return readw(addr);
 }
 
+static inline unsigned int ioread16be(void __iomem *addr)
+{
+	return in_be16(addr);
+}
+
 static inline unsigned int ioread32(void __iomem *addr)
 {
 	return readl(addr);
 }
 
+static inline unsigned int ioread32be(void __iomem *addr)
+{
+	return in_be32(addr);
+}
+
 static inline void iowrite8(u8 val, void __iomem *addr)
 {
 	writeb(val, addr);
@@ -502,11 +512,21 @@ static inline void iowrite16(u16 val, vo
 	writew(val, addr);
 }
 
+static inline void iowrite16be(u16 val, void __iomem *addr)
+{
+	out_be16(addr, val);
+}
+
 static inline void iowrite32(u32 val, void __iomem *addr)
 {
 	writel(val, addr);
 }
 
+static inline void iowrite32be(u32 val, void __iomem *addr)
+{
+	out_be32(addr, val);
+}
+
 static inline void ioread8_rep(void __iomem *addr, void *dst, unsigned long count)
 {
 	_insb(addr, dst, count);