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avr32: introduce asm/swab.h 

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Harvey Harrison 2009-01-06 14:56:22 -08:00 committed by Linus Torvalds
parent 991c0e6d1a
commit 292b4d0978
3 changed files with 38 additions and 29 deletions
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1
arch/avr32/include/asm/Kbuild
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@ -1,3 +1,4 @@
include include/asm-generic/Kbuild.asm
header-y += swab.h
header-y += cachectl.h

31
arch/avr32/include/asm/byteorder.h
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@ -4,34 +4,7 @@
#ifndef __ASM_AVR32_BYTEORDER_H
#define __ASM_AVR32_BYTEORDER_H
#include <asm/types.h>
#include <linux/compiler.h>
#include <asm/swab.h>
#include <linux/byteorder/big_endian.h>
#define __BIG_ENDIAN
#define __SWAB_64_THRU_32__
#ifdef __CHECKER__
extern unsigned long __builtin_bswap_32(unsigned long x);
extern unsigned short __builtin_bswap_16(unsigned short x);
#endif
/*
* avr32-linux-gcc versions earlier than 4.2 improperly sign-extends
* the result.
*/
#if !(__GNUC__ == 4 && __GNUC_MINOR__ < 2)
static inline __attribute_const__ __u16 __arch_swab16(__u16 val)
{
return __builtin_bswap_16(val);
}
#define __arch_swab16 __arch_swab16
static inline __attribute_const__ __u32 __arch_swab32(__u32 val)
{
return __builtin_bswap_32(val);
}
#define __arch_swab32 __arch_swab32
#endif
#include <linux/byteorder.h>
#endif /* __ASM_AVR32_BYTEORDER_H */

35
arch/avr32/include/asm/swab.h Normal file
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@ -0,0 +1,35 @@
/*
* AVR32 byteswapping functions.
*/
#ifndef __ASM_AVR32_SWAB_H
#define __ASM_AVR32_SWAB_H
#include <asm/types.h>
#include <linux/compiler.h>
#define __SWAB_64_THRU_32__
#ifdef __CHECKER__
extern unsigned long __builtin_bswap_32(unsigned long x);
extern unsigned short __builtin_bswap_16(unsigned short x);
#endif
/*
* avr32-linux-gcc versions earlier than 4.2 improperly sign-extends
* the result.
*/
#if !(__GNUC__ == 4 && __GNUC_MINOR__ < 2)
static inline __attribute_const__ __u16 __arch_swab16(__u16 val)
{
return __builtin_bswap_16(val);
}
#define __arch_swab16 __arch_swab16
static inline __attribute_const__ __u32 __arch_swab32(__u32 val)
{
return __builtin_bswap_32(val);
}
#define __arch_swab32 __arch_swab32
#endif
#endif /* __ASM_AVR32_SWAB_H */