1#ifndef _ASM_POWERPC_BYTEORDER_H 2#define _ASM_POWERPC_BYTEORDER_H 3 4/* 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License 7 * as published by the Free Software Foundation; either version 8 * 2 of the License, or (at your option) any later version. 9 */ 10 11#include <asm/types.h> 12#include <linux/compiler.h> 13 14#ifdef __GNUC__ 15#ifdef __KERNEL__ 16 17static __inline__ __u16 ld_le16(const volatile __u16 *addr) 18{ 19 __u16 val; 20 21 __asm__ __volatile__ ("lhbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr)); 22 return val; 23} 24 25static __inline__ void st_le16(volatile __u16 *addr, const __u16 val) 26{ 27 __asm__ __volatile__ ("sthbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr)); 28} 29 30static __inline__ __u32 ld_le32(const volatile __u32 *addr) 31{ 32 __u32 val; 33 34 __asm__ __volatile__ ("lwbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr)); 35 return val; 36} 37 38static __inline__ void st_le32(volatile __u32 *addr, const __u32 val) 39{ 40 __asm__ __volatile__ ("stwbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr)); 41} 42 43static __inline__ __attribute_const__ __u16 ___arch__swab16(__u16 value) 44{ 45 __u16 result; 46 47 __asm__("rlwimi %0,%1,8,16,23" 48 : "=r" (result) 49 : "r" (value), "0" (value >> 8)); 50 return result; 51} 52 53static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 value) 54{ 55 __u32 result; 56 57 __asm__("rlwimi %0,%1,24,16,23\n\t" 58 "rlwimi %0,%1,8,8,15\n\t" 59 "rlwimi %0,%1,24,0,7" 60 : "=r" (result) 61 : "r" (value), "0" (value >> 24)); 62 return result; 63} 64 65#define __arch__swab16(x) ___arch__swab16(x) 66#define __arch__swab32(x) ___arch__swab32(x) 67 68/* The same, but returns converted value from the location pointer by addr. */ 69#define __arch__swab16p(addr) ld_le16(addr) 70#define __arch__swab32p(addr) ld_le32(addr) 71 72/* The same, but do the conversion in situ, ie. put the value back to addr. */ 73#define __arch__swab16s(addr) st_le16(addr,*addr) 74#define __arch__swab32s(addr) st_le32(addr,*addr) 75 76#endif /* __KERNEL__ */ 77 78#ifndef __STRICT_ANSI__ 79#define __BYTEORDER_HAS_U64__ 80#ifndef __powerpc64__ 81#define __SWAB_64_THRU_32__ 82#endif /* __powerpc64__ */ 83#endif /* __STRICT_ANSI__ */ 84 85#endif /* __GNUC__ */ 86 87#include <linux/byteorder/big_endian.h> 88 89#endif /* _ASM_POWERPC_BYTEORDER_H */ 90