1 files changed, 125 insertions, 0 deletions

diff --git a/arch/s390/include/asm/byteorder.h b/arch/s390/include/asm/byteorder.h
new file mode 100644
index 000000000000..1fe2492baa8d
--- /dev/null
+++ b/arch/s390/include/asm/byteorder.h
@@ -0,0 +1,125 @@
+#ifndef _S390_BYTEORDER_H
+#define _S390_BYTEORDER_H
+
+/*
+ *  include/asm-s390/byteorder.h
+ *
+ *  S390 version
+ *    Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ *    Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
+ */
+
+#include <asm/types.h>
+
+#ifdef __GNUC__
+
+#ifdef __s390x__
+static inline __u64 ___arch__swab64p(const __u64 *x)
+{
+        __u64 result;
+
+        asm volatile("lrvg %0,%1" : "=d" (result) : "m" (*x));
+        return result;
+}
+
+static inline __u64 ___arch__swab64(__u64 x)
+{
+        __u64 result;
+
+        asm volatile("lrvgr %0,%1" : "=d" (result) : "d" (x));
+        return result;
+}
+
+static inline void ___arch__swab64s(__u64 *x)
+{
+        *x = ___arch__swab64p(x);
+}
+#endif /* __s390x__ */
+
+static inline __u32 ___arch__swab32p(const __u32 *x)
+{
+        __u32 result;
+        
+        asm volatile(
+#ifndef __s390x__
+                "       icm     %0,8,3(%1)\n"
+                "       icm     %0,4,2(%1)\n"
+                "       icm     %0,2,1(%1)\n"
+                "       ic      %0,0(%1)"
+                : "=&d" (result) : "a" (x), "m" (*x) : "cc");
+#else /* __s390x__ */
+                "       lrv     %0,%1"
+                : "=d" (result) : "m" (*x));
+#endif /* __s390x__ */
+        return result;
+}
+
+static inline __u32 ___arch__swab32(__u32 x)
+{
+#ifndef __s390x__
+        return ___arch__swab32p(&x);
+#else /* __s390x__ */
+        __u32 result;
+        
+        asm volatile("lrvr  %0,%1" : "=d" (result) : "d" (x));
+        return result;
+#endif /* __s390x__ */
+}
+
+static __inline__ void ___arch__swab32s(__u32 *x)
+{
+        *x = ___arch__swab32p(x);
+}
+
+static __inline__ __u16 ___arch__swab16p(const __u16 *x)
+{
+        __u16 result;
+        
+        asm volatile(
+#ifndef __s390x__
+                "       icm     %0,2,1(%1)\n"
+                "       ic      %0,0(%1)\n"
+                : "=&d" (result) : "a" (x), "m" (*x) : "cc");
+#else /* __s390x__ */
+                "       lrvh    %0,%1"
+                : "=d" (result) : "m" (*x));
+#endif /* __s390x__ */
+        return result;
+}
+
+static __inline__ __u16 ___arch__swab16(__u16 x)
+{
+        return ___arch__swab16p(&x);
+}
+
+static __inline__ void ___arch__swab16s(__u16 *x)
+{
+        *x = ___arch__swab16p(x);
+}
+
+#ifdef __s390x__
+#define __arch__swab64(x) ___arch__swab64(x)
+#define __arch__swab64p(x) ___arch__swab64p(x)
+#define __arch__swab64s(x) ___arch__swab64s(x)
+#endif /* __s390x__ */
+#define __arch__swab32(x) ___arch__swab32(x)
+#define __arch__swab16(x) ___arch__swab16(x)
+#define __arch__swab32p(x) ___arch__swab32p(x)
+#define __arch__swab16p(x) ___arch__swab16p(x)
+#define __arch__swab32s(x) ___arch__swab32s(x)
+#define __arch__swab16s(x) ___arch__swab16s(x)
+
+#ifndef __s390x__
+#if !defined(__STRICT_ANSI__) || defined(__KERNEL__)
+#  define __BYTEORDER_HAS_U64__
+#  define __SWAB_64_THRU_32__
+#endif
+#else /* __s390x__ */
+#define __BYTEORDER_HAS_U64__
+#endif /* __s390x__ */
+
+#endif /* __GNUC__ */
+
+#include <linux/byteorder/big_endian.h>
+
+#endif /* _S390_BYTEORDER_H */