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 25