powerpc/boot: Define byteswapping routines for little endian
These are not the most efficient versions of swab but the wrapper does
not do much byte swapping. On a big endian cpu, these routines are
a no-op.
Signed-off-by: Cédric Le Goater <clg@fr.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/boot/of.h b/arch/powerpc/boot/of.h
index e1ef620..c8c1750 100644
--- a/arch/powerpc/boot/of.h
+++ b/arch/powerpc/boot/of.h
@@ -1,6 +1,8 @@
#ifndef _PPC_BOOT_OF_H_
#define _PPC_BOOT_OF_H_
+#include "swab.h"
+
typedef void *phandle;
typedef u32 ihandle;
@@ -21,8 +23,13 @@
typedef u32 __be32;
+#ifdef __LITTLE_ENDIAN__
+#define cpu_to_be32(x) swab32(x)
+#define be32_to_cpu(x) swab32(x)
+#else
#define cpu_to_be32(x) (x)
#define be32_to_cpu(x) (x)
+#endif
#define PROM_ERROR (-1u)
