arch/tile/include/asm/unaligned.h

   1 /*
   2  * Copyright 2010 Tilera Corporation. All Rights Reserved.
   3  *
   4  *   This program is free software; you can redistribute it and/or
   5  *   modify it under the terms of the GNU General Public License
   6  *   as published by the Free Software Foundation, version 2.
   7  *
   8  *   This program is distributed in the hope that it will be useful, but
   9  *   WITHOUT ANY WARRANTY; without even the implied warranty of
  10  *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  11  *   NON INFRINGEMENT.  See the GNU General Public License for
  12  *   more details.
  13  */
  14
  15 #ifndef _ASM_TILE_UNALIGNED_H
  16 #define _ASM_TILE_UNALIGNED_H
  17
  18 /*
  19  * We could implement faster get_unaligned_[be/le]64 using the ldna
  20  * instruction on tilegx; however, we need to either copy all of the
  21  * other generic functions to here (which is pretty ugly) or else
  22  * modify both the generic code and other arch code to allow arch
  23  * specific unaligned data access functions.  Given these functions
  24  * are not often called, we'll stick with the generic version.
  25  */
  26 #include <asm-generic/unaligned.h>
  27
  28 /*
  29  * Is the kernel doing fixups of unaligned accesses?  If <0, no kernel
  30  * intervention occurs and SIGBUS is delivered with no data address
  31  * info.  If 0, the kernel single-steps the instruction to discover
  32  * the data address to provide with the SIGBUS.  If 1, the kernel does
  33  * a fixup.
  34  */
  35 extern int unaligned_fixup;
  36
  37 /* Is the kernel printing on each unaligned fixup? */
  38 extern int unaligned_printk;
  39
  40 /* Number of unaligned fixups performed */
  41 extern unsigned int unaligned_fixup_count;
  42
  43 #endif /* _ASM_TILE_UNALIGNED_H */