1*a47a12beSStefan Roese #ifndef _PPC_BYTEORDER_H 2*a47a12beSStefan Roese #define _PPC_BYTEORDER_H 3*a47a12beSStefan Roese 4*a47a12beSStefan Roese #include <asm/types.h> 5*a47a12beSStefan Roese 6*a47a12beSStefan Roese #ifdef __GNUC__ 7*a47a12beSStefan Roese 8*a47a12beSStefan Roese extern __inline__ unsigned ld_le16(const volatile unsigned short *addr) 9*a47a12beSStefan Roese { 10*a47a12beSStefan Roese unsigned val; 11*a47a12beSStefan Roese 12*a47a12beSStefan Roese __asm__ __volatile__ ("lhbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr)); 13*a47a12beSStefan Roese return val; 14*a47a12beSStefan Roese } 15*a47a12beSStefan Roese 16*a47a12beSStefan Roese extern __inline__ void st_le16(volatile unsigned short *addr, const unsigned val) 17*a47a12beSStefan Roese { 18*a47a12beSStefan Roese __asm__ __volatile__ ("sthbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr)); 19*a47a12beSStefan Roese } 20*a47a12beSStefan Roese 21*a47a12beSStefan Roese extern __inline__ unsigned ld_le32(const volatile unsigned *addr) 22*a47a12beSStefan Roese { 23*a47a12beSStefan Roese unsigned val; 24*a47a12beSStefan Roese 25*a47a12beSStefan Roese __asm__ __volatile__ ("lwbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr)); 26*a47a12beSStefan Roese return val; 27*a47a12beSStefan Roese } 28*a47a12beSStefan Roese 29*a47a12beSStefan Roese extern __inline__ void st_le32(volatile unsigned *addr, const unsigned val) 30*a47a12beSStefan Roese { 31*a47a12beSStefan Roese __asm__ __volatile__ ("stwbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr)); 32*a47a12beSStefan Roese } 33*a47a12beSStefan Roese 34*a47a12beSStefan Roese /* alas, egcs sounds like it has a bug in this code that doesn't use the 35*a47a12beSStefan Roese inline asm correctly, and can cause file corruption. Until I hear that 36*a47a12beSStefan Roese it's fixed, I can live without the extra speed. I hope. */ 37*a47a12beSStefan Roese #if !(__GNUC__ >= 2 && __GNUC_MINOR__ >= 90) 38*a47a12beSStefan Roese #if 0 39*a47a12beSStefan Roese # define __arch_swab16(x) ld_le16(&x) 40*a47a12beSStefan Roese # define __arch_swab32(x) ld_le32(&x) 41*a47a12beSStefan Roese #else 42*a47a12beSStefan Roese static __inline__ __attribute__((const)) __u16 ___arch__swab16(__u16 value) 43*a47a12beSStefan Roese { 44*a47a12beSStefan Roese __u16 result; 45*a47a12beSStefan Roese 46*a47a12beSStefan Roese __asm__("rlwimi %0,%1,8,16,23" 47*a47a12beSStefan Roese : "=r" (result) 48*a47a12beSStefan Roese : "r" (value), "0" (value >> 8)); 49*a47a12beSStefan Roese return result; 50*a47a12beSStefan Roese } 51*a47a12beSStefan Roese 52*a47a12beSStefan Roese static __inline__ __attribute__((const)) __u32 ___arch__swab32(__u32 value) 53*a47a12beSStefan Roese { 54*a47a12beSStefan Roese __u32 result; 55*a47a12beSStefan Roese 56*a47a12beSStefan Roese __asm__("rlwimi %0,%1,24,16,23\n\t" 57*a47a12beSStefan Roese "rlwimi %0,%1,8,8,15\n\t" 58*a47a12beSStefan Roese "rlwimi %0,%1,24,0,7" 59*a47a12beSStefan Roese : "=r" (result) 60*a47a12beSStefan Roese : "r" (value), "0" (value >> 24)); 61*a47a12beSStefan Roese return result; 62*a47a12beSStefan Roese } 63*a47a12beSStefan Roese #define __arch__swab32(x) ___arch__swab32(x) 64*a47a12beSStefan Roese #define __arch__swab16(x) ___arch__swab16(x) 65*a47a12beSStefan Roese #endif /* 0 */ 66*a47a12beSStefan Roese 67*a47a12beSStefan Roese #endif 68*a47a12beSStefan Roese 69*a47a12beSStefan Roese /* The same, but returns converted value from the location pointer by addr. */ 70*a47a12beSStefan Roese #define __arch__swab16p(addr) ld_le16(addr) 71*a47a12beSStefan Roese #define __arch__swab32p(addr) ld_le32(addr) 72*a47a12beSStefan Roese 73*a47a12beSStefan Roese /* The same, but do the conversion in situ, ie. put the value back to addr. */ 74*a47a12beSStefan Roese #define __arch__swab16s(addr) st_le16(addr,*addr) 75*a47a12beSStefan Roese #define __arch__swab32s(addr) st_le32(addr,*addr) 76*a47a12beSStefan Roese 77*a47a12beSStefan Roese #endif /* __GNUC__ */ 78*a47a12beSStefan Roese 79*a47a12beSStefan Roese #if defined(__GNUC__) && !defined(__STRICT_ANSI__) 80*a47a12beSStefan Roese #define __BYTEORDER_HAS_U64__ 81*a47a12beSStefan Roese #endif 82*a47a12beSStefan Roese #include <linux/byteorder/big_endian.h> 83*a47a12beSStefan Roese 84*a47a12beSStefan Roese #endif /* _PPC_BYTEORDER_H */ 85