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