powerpc/boot/fdt: Add little-endian support to libfdt wrappers

For epapr-style boot, we may be little-endian. This change implements
the proper conversion for fdt*_to_cpu and cpu_to_fdt*. We also need the
full cpu_to_* and *_to_cpu macros for this.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

2 files changed, 16 insertions, 6 deletions

diff --git a/arch/powerpc/boot/libfdt_env.h b/arch/powerpc/boot/libfdt_env.h
index c89fdb1b80e1..8dcd744e5728 100644
--- a/arch/powerpc/boot/libfdt_env.h
+++ b/arch/powerpc/boot/libfdt_env.h
@@ -4,15 +4,17 @@
 #include <types.h>
 #include <string.h>
 
+#include "of.h"
+
 typedef u32 uint32_t;
 typedef u64 uint64_t;
 typedef unsigned long uintptr_t;
 
-#define fdt16_to_cpu(x)         (x)
-#define cpu_to_fdt16(x)         (x)
-#define fdt32_to_cpu(x)         (x)
-#define cpu_to_fdt32(x)         (x)
-#define fdt64_to_cpu(x)         (x)
-#define cpu_to_fdt64(x)         (x)
+#define fdt16_to_cpu(x)         be16_to_cpu(x)
+#define cpu_to_fdt16(x)         cpu_to_be16(x)
+#define fdt32_to_cpu(x)         be32_to_cpu(x)
+#define cpu_to_fdt32(x)         cpu_to_be32(x)
+#define fdt64_to_cpu(x)         be64_to_cpu(x)
+#define cpu_to_fdt64(x)         cpu_to_be64(x)
 
 #endif /* _ARCH_POWERPC_BOOT_LIBFDT_ENV_H */
diff --git a/arch/powerpc/boot/of.h b/arch/powerpc/boot/of.h
index c8c1750aba0c..5603320dce07 100644
--- a/arch/powerpc/boot/of.h
+++ b/arch/powerpc/boot/of.h
@@ -24,11 +24,19 @@ void of_console_init(void);
 typedef u32                     __be32;
 
 #ifdef __LITTLE_ENDIAN__
+#define cpu_to_be16(x) swab16(x)
+#define be16_to_cpu(x) swab16(x)
 #define cpu_to_be32(x) swab32(x)
 #define be32_to_cpu(x) swab32(x)
+#define cpu_to_be64(x) swab64(x)
+#define be64_to_cpu(x) swab64(x)
 #else
+#define cpu_to_be16(x) (x)
+#define be16_to_cpu(x) (x)
 #define cpu_to_be32(x) (x)
 #define be32_to_cpu(x) (x)
+#define cpu_to_be64(x) (x)
+#define be64_to_cpu(x) (x)
 #endif
 
 #define PROM_ERROR (-1u)