arch/unicore32/include/asm/cache.h

   1 /*
   2  * linux/arch/unicore32/include/asm/cache.h
   3  *
   4  * Code specific to PKUnity SoC and UniCore ISA
   5  *
   6  * Copyright (C) 2001-2010 GUAN Xue-tao
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12 #ifndef __UNICORE_CACHE_H__
  13 #define __UNICORE_CACHE_H__
  14
  15 #define L1_CACHE_SHIFT          (5)
  16 #define L1_CACHE_BYTES          (1 << L1_CACHE_SHIFT)
  17
  18 /*
  19  * Memory returned by kmalloc() may be used for DMA, so we must make
  20  * sure that all such allocations are cache aligned. Otherwise,
  21  * unrelated code may cause parts of the buffer to be read into the
  22  * cache before the transfer is done, causing old data to be seen by
  23  * the CPU.
  24  */
  25 #define ARCH_DMA_MINALIGN       L1_CACHE_BYTES
  26
  27 #endif