[linux-block.git] / arch / arm / include / asm / cache.h

/*
 *  arch/arm/include/asm/cache.h
 */
#ifndef __ASMARM_CACHE_H
#define __ASMARM_CACHE_H

#define L1_CACHE_SHIFT		CONFIG_ARM_L1_CACHE_SHIFT
#define L1_CACHE_BYTES		(1 << L1_CACHE_SHIFT)

/*
 * Memory returned by kmalloc() may be used for DMA, so we must make
 * sure that all such allocations are cache aligned. Otherwise,
 * unrelated code may cause parts of the buffer to be read into the
 * cache before the transfer is done, causing old data to be seen by
 * the CPU.
 */
#define ARCH_KMALLOC_MINALIGN	L1_CACHE_BYTES

/*
 * With EABI on ARMv5 and above we must have 64-bit aligned slab pointers.
 */
#if defined(CONFIG_AEABI) && (__LINUX_ARM_ARCH__ >= 5)
#define ARCH_SLAB_MINALIGN 8
#endif

#endif
Commit	Line	Data
1da177e4	1	/*
4baa9922	2	* arch/arm/include/asm/cache.h
1da177e4 LT	3	*/
	4	#ifndef __ASMARM_CACHE_H
	5	#define __ASMARM_CACHE_H
	6
910a17e5	7	#define L1_CACHE_SHIFT CONFIG_ARM_L1_CACHE_SHIFT
1da177e4 LT	8	#define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT)
1da177e4 LT	9
eb5f4ca9 MF	10	/*
	11	* Memory returned by kmalloc() may be used for DMA, so we must make
	12	* sure that all such allocations are cache aligned. Otherwise,
	13	* unrelated code may cause parts of the buffer to be read into the
	14	* cache before the transfer is done, causing old data to be seen by
	15	* the CPU.
	16	*/
	17	#define ARCH_KMALLOC_MINALIGN L1_CACHE_BYTES
	18
	19	/*
	20	* With EABI on ARMv5 and above we must have 64-bit aligned slab pointers.
	21	*/
	22	#if defined(CONFIG_AEABI) && (__LINUX_ARM_ARCH__ >= 5)
	23	#define ARCH_SLAB_MINALIGN 8
	24	#endif
	25
1da177e4	26	#endif