arch/powerpc/include/asm/swab.h

   1 /*
   2  * This program is free software; you can redistribute it and/or
   3  * modify it under the terms of the GNU General Public License
   4  * as published by the Free Software Foundation; either version
   5  * 2 of the License, or (at your option) any later version.
   6  */
   7 #ifndef _ASM_POWERPC_SWAB_H
   8 #define _ASM_POWERPC_SWAB_H
   9
  10 #include <uapi/asm/swab.h>
  11
  12 static __inline__ __u16 ld_le16(const volatile __u16 *addr)
  13 {
  14         __u16 val;
  15
  16         __asm__ __volatile__ ("lhbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr));
  17         return val;
  18 }
  19
  20 static __inline__ void st_le16(volatile __u16 *addr, const __u16 val)
  21 {
  22         __asm__ __volatile__ ("sthbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr));
  23 }
  24
  25 static __inline__ __u32 ld_le32(const volatile __u32 *addr)
  26 {
  27         __u32 val;
  28
  29         __asm__ __volatile__ ("lwbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr));
  30         return val;
  31 }
  32
  33 static __inline__ void st_le32(volatile __u32 *addr, const __u32 val)
  34 {
  35         __asm__ __volatile__ ("stwbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr));
  36 }
  37
  38 #endif /* _ASM_POWERPC_SWAB_H */