2 * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
3 * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
5 * SPDX-License-Identifier: GPL-2.0+
8 #ifndef _M68K_BYTEORDER_H
9 #define _M68K_BYTEORDER_H
11 #include <asm/types.h>
16 (((__u16)(x) & (__u16)0x00ffU) << 8) | \
17 (((__u16)(x) & (__u16)0xff00U) >> 8) ))
20 (((__u32)(x)) << 24) | \
21 (((__u32)(x) & (__u32)0x0000ff00UL) << 8) | \
22 (((__u32)(x) & (__u32)0x00ff0000UL) >> 8) | \
23 (((__u32)(x)) >> 24) ))
25 extern __inline__ unsigned ld_le16(const volatile unsigned short *addr)
27 unsigned result = *addr;
28 return __sw16(result);
31 extern __inline__ void st_le16(volatile unsigned short *addr,
37 extern __inline__ unsigned ld_le32(const volatile unsigned *addr)
39 unsigned result = *addr;
40 return __sw32(result);
43 extern __inline__ void st_le32(volatile unsigned *addr, const unsigned val)
49 /* alas, egcs sounds like it has a bug in this code that doesn't use the
50 inline asm correctly, and can cause file corruption. Until I hear that
51 it's fixed, I can live without the extra speed. I hope. */
52 #if !(__GNUC__ >= 2 && __GNUC_MINOR__ >= 90)
54 # define __arch_swab16(x) ld_le16(&x)
55 # define __arch_swab32(x) ld_le32(&x)
57 static __inline__ __attribute__ ((const))
58 __u16 ___arch__swab16(__u16 value)
63 static __inline__ __attribute__ ((const))
64 __u32 ___arch__swab32(__u32 value)
69 #define __arch__swab32(x) ___arch__swab32(x)
70 #define __arch__swab16(x) ___arch__swab16(x)
75 /* The same, but returns converted value from the location pointer by addr. */
76 #define __arch__swab16p(addr) ld_le16(addr)
77 #define __arch__swab32p(addr) ld_le32(addr)
79 /* The same, but do the conversion in situ, ie. put the value back to addr. */
80 #define __arch__swab16s(addr) st_le16(addr,*addr)
81 #define __arch__swab32s(addr) st_le32(addr,*addr)
86 #if defined(__GNUC__) && !defined(__STRICT_ANSI__)
87 #define __BYTEORDER_HAS_U64__
89 #include <linux/byteorder/big_endian.h>
91 #endif /* _M68K_BYTEORDER_H */