1819833afSPeter Tyser /* 2819833afSPeter Tyser * Copyright (C) 2004-2007 Freescale Semiconductor, Inc. 3819833afSPeter Tyser * TsiChung Liew (Tsi-Chung.Liew@freescale.com) 4819833afSPeter Tyser * 51a459660SWolfgang Denk * SPDX-License-Identifier: GPL-2.0+ 6819833afSPeter Tyser */ 7819833afSPeter Tyser 8819833afSPeter Tyser #ifndef _M68K_BYTEORDER_H 9819833afSPeter Tyser #define _M68K_BYTEORDER_H 10819833afSPeter Tyser 11819833afSPeter Tyser #include <asm/types.h> 12819833afSPeter Tyser 13819833afSPeter Tyser #ifdef __GNUC__ 14819833afSPeter Tyser #define __sw16(x) \ 15819833afSPeter Tyser ((__u16)( \ 16819833afSPeter Tyser (((__u16)(x) & (__u16)0x00ffU) << 8) | \ 17819833afSPeter Tyser (((__u16)(x) & (__u16)0xff00U) >> 8) )) 18819833afSPeter Tyser #define __sw32(x) \ 19819833afSPeter Tyser ((__u32)( \ 20819833afSPeter Tyser (((__u32)(x)) << 24) | \ 21819833afSPeter Tyser (((__u32)(x) & (__u32)0x0000ff00UL) << 8) | \ 22819833afSPeter Tyser (((__u32)(x) & (__u32)0x00ff0000UL) >> 8) | \ 23819833afSPeter Tyser (((__u32)(x)) >> 24) )) 24819833afSPeter Tyser 25*44d0677aSMåns Rullgård static __inline__ unsigned ld_le16(const volatile unsigned short *addr) 26819833afSPeter Tyser { 27819833afSPeter Tyser unsigned result = *addr; 28819833afSPeter Tyser return __sw16(result); 29819833afSPeter Tyser } 30819833afSPeter Tyser 31*44d0677aSMåns Rullgård static __inline__ void st_le16(volatile unsigned short *addr, 32819833afSPeter Tyser const unsigned val) 33819833afSPeter Tyser { 34819833afSPeter Tyser *addr = __sw16(val); 35819833afSPeter Tyser } 36819833afSPeter Tyser 37*44d0677aSMåns Rullgård static __inline__ unsigned ld_le32(const volatile unsigned *addr) 38819833afSPeter Tyser { 39819833afSPeter Tyser unsigned result = *addr; 40819833afSPeter Tyser return __sw32(result); 41819833afSPeter Tyser } 42819833afSPeter Tyser 43*44d0677aSMåns Rullgård static __inline__ void st_le32(volatile unsigned *addr, const unsigned val) 44819833afSPeter Tyser { 45819833afSPeter Tyser *addr = __sw32(val); 46819833afSPeter Tyser } 47819833afSPeter Tyser 48819833afSPeter Tyser #if 0 49819833afSPeter Tyser /* alas, egcs sounds like it has a bug in this code that doesn't use the 50819833afSPeter Tyser inline asm correctly, and can cause file corruption. Until I hear that 51819833afSPeter Tyser it's fixed, I can live without the extra speed. I hope. */ 52819833afSPeter Tyser #if !(__GNUC__ >= 2 && __GNUC_MINOR__ >= 90) 53819833afSPeter Tyser #if 0 54819833afSPeter Tyser # define __arch_swab16(x) ld_le16(&x) 55819833afSPeter Tyser # define __arch_swab32(x) ld_le32(&x) 56819833afSPeter Tyser #else 57819833afSPeter Tyser static __inline__ __attribute__ ((const)) 58819833afSPeter Tyser __u16 ___arch__swab16(__u16 value) 59819833afSPeter Tyser { 60819833afSPeter Tyser return __sw16(value); 61819833afSPeter Tyser } 62819833afSPeter Tyser 63819833afSPeter Tyser static __inline__ __attribute__ ((const)) 64819833afSPeter Tyser __u32 ___arch__swab32(__u32 value) 65819833afSPeter Tyser { 66819833afSPeter Tyser return __sw32(value); 67819833afSPeter Tyser } 68819833afSPeter Tyser 69819833afSPeter Tyser #define __arch__swab32(x) ___arch__swab32(x) 70819833afSPeter Tyser #define __arch__swab16(x) ___arch__swab16(x) 71819833afSPeter Tyser #endif /* 0 */ 72819833afSPeter Tyser 73819833afSPeter Tyser #endif 74819833afSPeter Tyser 75819833afSPeter Tyser /* The same, but returns converted value from the location pointer by addr. */ 76819833afSPeter Tyser #define __arch__swab16p(addr) ld_le16(addr) 77819833afSPeter Tyser #define __arch__swab32p(addr) ld_le32(addr) 78819833afSPeter Tyser 79819833afSPeter Tyser /* The same, but do the conversion in situ, ie. put the value back to addr. */ 80819833afSPeter Tyser #define __arch__swab16s(addr) st_le16(addr,*addr) 81819833afSPeter Tyser #define __arch__swab32s(addr) st_le32(addr,*addr) 82819833afSPeter Tyser #endif 83819833afSPeter Tyser 84819833afSPeter Tyser #endif /* __GNUC__ */ 85819833afSPeter Tyser 86819833afSPeter Tyser #if defined(__GNUC__) && !defined(__STRICT_ANSI__) 87819833afSPeter Tyser #define __BYTEORDER_HAS_U64__ 88819833afSPeter Tyser #endif 89819833afSPeter Tyser #include <linux/byteorder/big_endian.h> 90819833afSPeter Tyser 91819833afSPeter Tyser #endif /* _M68K_BYTEORDER_H */ 92