summaryrefslogtreecommitdiff
path: root/arch/i386/include/asm/byteorder.h
diff options
context:
space:
mode:
authorPeter Tyser <ptyser@xes-inc.com>2010-04-12 22:28:08 -0500
committerWolfgang Denk <wd@denx.de>2010-04-13 09:13:12 +0200
commit819833af39a91fa1c1e8252862bbda6f5a602f7b (patch)
treed5c9d1628643347ab2b5a8085acfa6f96709fda3 /arch/i386/include/asm/byteorder.h
parent61f2b38a17f5b21c59f2afe6cf1cbb5f28638cf9 (diff)
downloadu-boot-imx-819833af39a91fa1c1e8252862bbda6f5a602f7b.zip
u-boot-imx-819833af39a91fa1c1e8252862bbda6f5a602f7b.tar.gz
u-boot-imx-819833af39a91fa1c1e8252862bbda6f5a602f7b.tar.bz2
Move architecture-specific includes to arch/$ARCH/include/asm
This helps to clean up the include/ directory so that it only contains non-architecture-specific headers and also matches Linux's directory layout which many U-Boot developers are already familiar with. Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Diffstat (limited to 'arch/i386/include/asm/byteorder.h')
-rw-r--r--arch/i386/include/asm/byteorder.h43
1 files changed, 43 insertions, 0 deletions
diff --git a/arch/i386/include/asm/byteorder.h b/arch/i386/include/asm/byteorder.h
new file mode 100644
index 0000000..7dfeb8b
--- /dev/null
+++ b/arch/i386/include/asm/byteorder.h
@@ -0,0 +1,43 @@
+#ifndef _I386_BYTEORDER_H
+#define _I386_BYTEORDER_H
+
+#include <asm/types.h>
+
+#ifdef __GNUC__
+
+
+static __inline__ __u32 ___arch__swab32(__u32 x)
+{
+#ifdef CONFIG_X86_BSWAP
+ __asm__("bswap %0" : "=r" (x) : "0" (x));
+#else
+ __asm__("xchgb %b0,%h0\n\t" /* swap lower bytes */
+ "rorl $16,%0\n\t" /* swap words */
+ "xchgb %b0,%h0" /* swap higher bytes */
+ :"=q" (x)
+ : "0" (x));
+#endif
+ return x;
+}
+
+static __inline__ __u16 ___arch__swab16(__u16 x)
+{
+ __asm__("xchgb %b0,%h0" /* swap bytes */ \
+ : "=q" (x) \
+ : "0" (x)); \
+ return x;
+}
+
+#define __arch__swab32(x) ___arch__swab32(x)
+#define __arch__swab16(x) ___arch__swab16(x)
+
+#if !defined(__STRICT_ANSI__) || defined(__KERNEL__)
+# define __BYTEORDER_HAS_U64__
+# define __SWAB_64_THRU_32__
+#endif
+
+#endif /* __GNUC__ */
+
+#include <linux/byteorder/little_endian.h>
+
+#endif /* _I386_BYTEORDER_H */