arch/arm/include/asm/arch-sc8800x/endian_conv.h

   1 #ifndef _ENDIAN_CONV_H_
   2 #define _ENDIAN_CONV_H_
   3 /* Endianess stuff */
   4 #define my_swab32(data32_ptr) \
   5         do{\
   6                     uint8_t* data8_ptr = (uint8_t*)data32_ptr;\
   7                     uint8_t tmp;\
   8                     tmp = data8_ptr[3];\
   9                     data8_ptr[3] = data8_ptr[0];\
  10                     data8_ptr[0] = tmp;\
  11                 \
  12                     tmp = data8_ptr[2];\
  13                     data8_ptr[2] = data8_ptr[1];\
  14                     data8_ptr[1] = tmp;\
  15         }while(0)
  16
  17 #define my_swab16(data16_ptr)\
  18         do{\
  19                     uint8_t* data8_ptr = (uint8_t*)data16_ptr;\
  20                     uint8_t tmp;\
  21                     tmp = data8_ptr[1];\
  22                     data8_ptr[1] = data8_ptr[0];\
  23                     data8_ptr[0] = tmp;\
  24         }while(0)
  25
  26 #define _INT_SWAP(type, ptr) \
  27            do{ if(sizeof(type) == 4) {  \
  28                                my_swab32(ptr); \
  29                            }else if(sizeof(type) == 2) { \
  30                                                    my_swab16(ptr);}   \
  31                        }while(0)
  32
  33 #ifdef CMDLINE_NEED_CONV
  34 #define INT_SWAP(data) _INT_SWAP(data, &(data))
  35 #else
  36 #define INT_SWAP(data)
  37 #endif
  38
  39 #endif // end of _ENDIAN_CONV_H_