arch/unicore32/include/asm/cache.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * linux/arch/unicore32/include/asm/cache.h
   4  *
   5  * Code specific to PKUnity SoC and UniCore ISA
   6  *
   7  * Copyright (C) 2001-2010 GUAN Xue-tao
   8  */
   9 #ifndef __UNICORE_CACHE_H__
  10 #define __UNICORE_CACHE_H__
  11
  12 #define L1_CACHE_SHIFT          (5)
  13 #define L1_CACHE_BYTES          (1 << L1_CACHE_SHIFT)
  14
  15 /*
  16  * Memory returned by kmalloc() may be used for DMA, so we must make
  17  * sure that all such allocations are cache aligned. Otherwise,
  18  * unrelated code may cause parts of the buffer to be read into the
  19  * cache before the transfer is done, causing old data to be seen by
  20  * the CPU.
  21  */
  22 #define ARCH_DMA_MINALIGN       L1_CACHE_BYTES
  23
  24 #endif