diff options
Diffstat (limited to 'arch/m68k/include/asm/byteorder.h')
-rw-r--r-- | arch/m68k/include/asm/byteorder.h | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/arch/m68k/include/asm/byteorder.h b/arch/m68k/include/asm/byteorder.h new file mode 100644 index 0000000..9179622 --- /dev/null +++ b/arch/m68k/include/asm/byteorder.h @@ -0,0 +1,96 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (C) 2004-2007 Freescale Semiconductor, Inc. + * TsiChung Liew (Tsi-Chung.Liew@freescale.com) + */ + +#ifndef _M68K_BYTEORDER_H +#define _M68K_BYTEORDER_H + +#include <asm/types.h> + +#ifdef __GNUC__ + +static inline __u32 __sw32(__u32 x) +{ + __u32 v = x; + + return v << 24 | + (v & (__u32)0x0000ff00UL) << 8 | + (v & (__u32)0x00ff0000UL) >> 8 | + v >> 24; +} + +static inline __u16 __sw16(__u16 x) +{ + __u16 v = x; + + return (v & (__u16)0x00ffU) << 8 | + (v & (__u16)0xff00U) >> 8; +} + +static __inline__ unsigned ld_le16(const volatile unsigned short *addr) +{ + return __sw16(*addr); +} + +static __inline__ void st_le16(volatile unsigned short *addr, + const unsigned val) +{ + *addr = __sw16(val); +} + +static __inline__ unsigned ld_le32(const volatile unsigned *addr) +{ + return __sw32(*addr); +} + +static __inline__ void st_le32(volatile unsigned *addr, const unsigned val) +{ + *addr = __sw32(val); +} + +#if 0 +/* alas, egcs sounds like it has a bug in this code that doesn't use the + inline asm correctly, and can cause file corruption. Until I hear that + it's fixed, I can live without the extra speed. I hope. */ +#if !(__GNUC__ >= 2 && __GNUC_MINOR__ >= 90) +#if 0 +# define __arch_swab16(x) ld_le16(&x) +# define __arch_swab32(x) ld_le32(&x) +#else +static __inline__ __attribute__ ((const)) +__u16 ___arch__swab16(__u16 value) +{ + return __sw16(value); +} + +static __inline__ __attribute__ ((const)) +__u32 ___arch__swab32(__u32 value) +{ + return __sw32(value); +} + +#define __arch__swab32(x) ___arch__swab32(x) +#define __arch__swab16(x) ___arch__swab16(x) +#endif /* 0 */ + +#endif + +/* The same, but returns converted value from the location pointer by addr. */ +#define __arch__swab16p(addr) ld_le16(addr) +#define __arch__swab32p(addr) ld_le32(addr) + +/* The same, but do the conversion in situ, ie. put the value back to addr. */ +#define __arch__swab16s(addr) st_le16(addr,*addr) +#define __arch__swab32s(addr) st_le32(addr,*addr) +#endif + +#endif /* __GNUC__ */ + +#if defined(__GNUC__) && !defined(__STRICT_ANSI__) +#define __BYTEORDER_HAS_U64__ +#endif +#include <linux/byteorder/big_endian.h> + +#endif /* _M68K_BYTEORDER_H */ |