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  1. /*
  2.  * Copyright (C) 2005 Jakub Jermar
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. #ifndef __ppc_BYTEORDER_H__
  30. #define __ppc_BYTEORDER_H__
  31.  
  32. #include <arch/types.h>
  33.  
  34. /** Convert little-endian __native to host __native
  35.  *
  36.  * Convert little-endian __native parameter to host endianess.
  37.  *
  38.  * @param n Little-endian __native argument.
  39.  *
  40.  * @return Result in host endianess.
  41.  *
  42.  */
  43. static inline __u64 u64_le2host(__u64 n)
  44. {
  45.     return ((n & 0xff) << 56) |
  46.         ((n & 0xff00) << 40) |
  47.         ((n & 0xff0000) << 24) |
  48.         ((n & 0xff000000LL) << 8) |
  49.         ((n & 0xff00000000LL) >>8) |
  50.         ((n & 0xff0000000000LL) >> 24) |
  51.         ((n & 0xff000000000000LL) >> 40) |
  52.         ((n & 0xff00000000000000LL) >> 56);
  53. }
  54. static inline __native native_le2host(__native n)
  55. {
  56.     __address v;
  57.    
  58.     __asm__ volatile ("lwbrx %0, %1, %2\n" : "=r" (v) : "i" (0) , "r" (&n));
  59.    
  60.     return v;
  61. }
  62. #endif
  63.