add BE I/O memory accessors for arch/ppc

SVN-Revision: 10287

target/linux/generic-2.6/patches-2.6.23/920-ppc_big_endian_io_memory_accessors.patch

@@ -0,0 +1,80 @@
+From a.othieno@bluewin.ch Tue Oct 11 07:50:21 2005
+From: Arthur Othieno <a.othieno@bluewin.ch>
+Subject: Big-endian I/O memory accessors.
+Date: Tue, 11 Oct 2005 07:50:21 +1000
+X-Patchwork-ID: 2759
+
+From: Arthur Othieno <a.othieno@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@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);
+