183d290c5STom Rini /* SPDX-License-Identifier: GPL-2.0+ */ 2819833afSPeter Tyser /* 3819833afSPeter Tyser * Copyright (C) 2004-2007 Freescale Semiconductor, Inc. 4819833afSPeter Tyser * TsiChung Liew (Tsi-Chung.Liew@freescale.com) 5819833afSPeter Tyser */ 6819833afSPeter Tyser 7819833afSPeter Tyser #ifndef _M68K_BYTEORDER_H 8819833afSPeter Tyser #define _M68K_BYTEORDER_H 9819833afSPeter Tyser 10819833afSPeter Tyser #include <asm/types.h> 11819833afSPeter Tyser 12819833afSPeter Tyser #ifdef __GNUC__ 13*faae4954SAngelo Dureghello 14*faae4954SAngelo Dureghello static inline __u32 __sw32(__u32 x) 15*faae4954SAngelo Dureghello { 16*faae4954SAngelo Dureghello __u32 v = x; 17*faae4954SAngelo Dureghello 18*faae4954SAngelo Dureghello return v << 24 | 19*faae4954SAngelo Dureghello (v & (__u32)0x0000ff00UL) << 8 | 20*faae4954SAngelo Dureghello (v & (__u32)0x00ff0000UL) >> 8 | 21*faae4954SAngelo Dureghello v >> 24; 22*faae4954SAngelo Dureghello } 23*faae4954SAngelo Dureghello 24*faae4954SAngelo Dureghello static inline __u16 __sw16(__u16 x) 25*faae4954SAngelo Dureghello { 26*faae4954SAngelo Dureghello __u16 v = x; 27*faae4954SAngelo Dureghello 28*faae4954SAngelo Dureghello return (v & (__u16)0x00ffU) << 8 | 29*faae4954SAngelo Dureghello (v & (__u16)0xff00U) >> 8; 30*faae4954SAngelo Dureghello } 31819833afSPeter Tyser 3244d0677aSMåns Rullgård static __inline__ unsigned ld_le16(const volatile unsigned short *addr) 33819833afSPeter Tyser { 34*faae4954SAngelo Dureghello return __sw16(*addr); 35819833afSPeter Tyser } 36819833afSPeter Tyser 3744d0677aSMåns Rullgård static __inline__ void st_le16(volatile unsigned short *addr, 38819833afSPeter Tyser const unsigned val) 39819833afSPeter Tyser { 40819833afSPeter Tyser *addr = __sw16(val); 41819833afSPeter Tyser } 42819833afSPeter Tyser 4344d0677aSMåns Rullgård static __inline__ unsigned ld_le32(const volatile unsigned *addr) 44819833afSPeter Tyser { 45*faae4954SAngelo Dureghello return __sw32(*addr); 46819833afSPeter Tyser } 47819833afSPeter Tyser 4844d0677aSMåns Rullgård static __inline__ void st_le32(volatile unsigned *addr, const unsigned val) 49819833afSPeter Tyser { 50819833afSPeter Tyser *addr = __sw32(val); 51819833afSPeter Tyser } 52819833afSPeter Tyser 53819833afSPeter Tyser #if 0 54819833afSPeter Tyser /* alas, egcs sounds like it has a bug in this code that doesn't use the 55819833afSPeter Tyser inline asm correctly, and can cause file corruption. Until I hear that 56819833afSPeter Tyser it's fixed, I can live without the extra speed. I hope. */ 57819833afSPeter Tyser #if !(__GNUC__ >= 2 && __GNUC_MINOR__ >= 90) 58819833afSPeter Tyser #if 0 59819833afSPeter Tyser # define __arch_swab16(x) ld_le16(&x) 60819833afSPeter Tyser # define __arch_swab32(x) ld_le32(&x) 61819833afSPeter Tyser #else 62819833afSPeter Tyser static __inline__ __attribute__ ((const)) 63819833afSPeter Tyser __u16 ___arch__swab16(__u16 value) 64819833afSPeter Tyser { 65819833afSPeter Tyser return __sw16(value); 66819833afSPeter Tyser } 67819833afSPeter Tyser 68819833afSPeter Tyser static __inline__ __attribute__ ((const)) 69819833afSPeter Tyser __u32 ___arch__swab32(__u32 value) 70819833afSPeter Tyser { 71819833afSPeter Tyser return __sw32(value); 72819833afSPeter Tyser } 73819833afSPeter Tyser 74819833afSPeter Tyser #define __arch__swab32(x) ___arch__swab32(x) 75819833afSPeter Tyser #define __arch__swab16(x) ___arch__swab16(x) 76819833afSPeter Tyser #endif /* 0 */ 77819833afSPeter Tyser 78819833afSPeter Tyser #endif 79819833afSPeter Tyser 80819833afSPeter Tyser /* The same, but returns converted value from the location pointer by addr. */ 81819833afSPeter Tyser #define __arch__swab16p(addr) ld_le16(addr) 82819833afSPeter Tyser #define __arch__swab32p(addr) ld_le32(addr) 83819833afSPeter Tyser 84819833afSPeter Tyser /* The same, but do the conversion in situ, ie. put the value back to addr. */ 85819833afSPeter Tyser #define __arch__swab16s(addr) st_le16(addr,*addr) 86819833afSPeter Tyser #define __arch__swab32s(addr) st_le32(addr,*addr) 87819833afSPeter Tyser #endif 88819833afSPeter Tyser 89819833afSPeter Tyser #endif /* __GNUC__ */ 90819833afSPeter Tyser 91819833afSPeter Tyser #if defined(__GNUC__) && !defined(__STRICT_ANSI__) 92819833afSPeter Tyser #define __BYTEORDER_HAS_U64__ 93819833afSPeter Tyser #endif 94819833afSPeter Tyser #include <linux/byteorder/big_endian.h> 95819833afSPeter Tyser 96819833afSPeter Tyser #endif /* _M68K_BYTEORDER_H */ 97