1/* 2 * Copyright (C) 2012 ARM Ltd. 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 * 13 * You should have received a copy of the GNU General Public License 14 * along with this program. If not, see <http://www.gnu.org/licenses/>. 15 */ 16#ifndef __ASM_CACHE_H 17#define __ASM_CACHE_H 18 19#define L1_CACHE_SHIFT 6 20#define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT) 21 22/* 23 * Memory returned by kmalloc() may be used for DMA, so we must make 24 * sure that all such allocations are cache aligned. Otherwise, 25 * unrelated code may cause parts of the buffer to be read into the 26 * cache before the transfer is done, causing old data to be seen by 27 * the CPU. 28 */ 29#define ARCH_DMA_MINALIGN L1_CACHE_BYTES 30#define ARCH_SLAB_MINALIGN 8 31 32#endif 33