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 28