import swab.h arch implementation form linux v2.3.37

this will avoid __bswapsi2 issue see with gcc 4.5.1

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

2 files changed, 51 insertions, 0 deletions

diff --git a/arch/blackfin/include/asm/bitsperlong.h b/arch/blackfin/include/asm/bitsperlong.h
new file mode 100644
index 0000000000..6dc0bb0c13
--- /dev/null
+++ b/arch/blackfin/include/asm/bitsperlong.h
@@ -0,0 +1 @@
+#include <asm-generic/bitsperlong.h>
diff --git a/arch/blackfin/include/asm/swab.h b/arch/blackfin/include/asm/swab.h
new file mode 100644
index 0000000000..89de6507ca
--- /dev/null
+++ b/arch/blackfin/include/asm/swab.h
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2009 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#ifndef _BLACKFIN_SWAB_H
+#define _BLACKFIN_SWAB_H
+
+#include <linux/types.h>
+#include <asm-generic/swab.h>
+
+#ifdef __GNUC__
+
+static __inline__ __attribute_const__ __u32 __arch_swahb32(__u32 xx)
+{
+	__u32 tmp;
+	__asm__("%1 = %0 >> 8 (V);\n\t"
+		"%0 = %0 << 8 (V);\n\t"
+		"%0 = %0 | %1;\n\t"
+		: "+d"(xx), "=&d"(tmp));
+	return xx;
+}
+#define __arch_swahb32 __arch_swahb32
+
+static __inline__ __attribute_const__ __u32 __arch_swahw32(__u32 xx)
+{
+	__u32 rv;
+	__asm__("%0 = PACK(%1.L, %1.H);\n\t": "=d"(rv): "d"(xx));
+	return rv;
+}
+#define __arch_swahw32 __arch_swahw32
+
+static __inline__ __attribute_const__ __u32 __arch_swab32(__u32 xx)
+{
+	return __arch_swahb32(__arch_swahw32(xx));
+}
+#define __arch_swab32 __arch_swab32
+
+static __inline__ __attribute_const__ __u16 __arch_swab16(__u16 xx)
+{
+	__u32 xw = xx;
+	__asm__("%0 <<= 8;\n	%0.L = %0.L + %0.H (NS);\n": "+d"(xw));
+	return (__u16)xw;
+}
+#define __arch_swab16 __arch_swab16
+
+#endif /* __GNUC__ */
+
+#endif				/* _BLACKFIN_SWAB_H */