1/* 2 * BK Id: SCCS/s.byteorder.h 1.8 10/11/01 13:02:49 trini 3 */ 4#ifndef _PPC_BYTEORDER_H 5#define _PPC_BYTEORDER_H 6 7#include <asm/types.h> 8 9#ifdef __GNUC__ 10#ifdef __KERNEL__ 11 12extern __inline__ unsigned ld_le16(const volatile unsigned short *addr) 13{ 14 unsigned val; 15 16 __asm__ __volatile__ ("lhbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr)); 17 return val; 18} 19 20extern __inline__ void st_le16(volatile unsigned short *addr, const unsigned val) 21{ 22 __asm__ __volatile__ ("sthbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr)); 23} 24 25extern __inline__ unsigned ld_le32(const volatile unsigned *addr) 26{ 27 unsigned val; 28 29 __asm__ __volatile__ ("lwbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr)); 30 return val; 31} 32 33extern __inline__ void st_le32(volatile unsigned *addr, const unsigned val) 34{ 35 __asm__ __volatile__ ("stwbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr)); 36} 37 38/* alas, egcs sounds like it has a bug in this code that doesn't use the 39 inline asm correctly, and can cause file corruption. Until I hear that 40 it's fixed, I can live without the extra speed. I hope. */ 41 42/* The same, but returns converted value from the location pointer by addr. */ 43#define __arch__swab16p(addr) ld_le16(addr) 44#define __arch__swab32p(addr) ld_le32(addr) 45 46/* The same, but do the conversion in situ, ie. put the value back to addr. */ 47#define __arch__swab16s(addr) st_le16(addr,*addr) 48#define __arch__swab32s(addr) st_le32(addr,*addr) 49 50#endif /* __KERNEL__ */ 51 52#if !defined(__STRICT_ANSI__) || defined(__KERNEL__) 53# define __BYTEORDER_HAS_U64__ 54# define __SWAB_64_THRU_32__ 55#endif 56 57#endif /* __GNUC__ */ 58 59#include <linux/byteorder/big_endian.h> 60 61#endif /* _PPC_BYTEORDER_H */ 62