mirror of
https://github.com/torvalds/linux.git
synced 2024-12-30 14:52:05 +00:00
a6eb9fe105
Now each architecture has the own dma_get_cache_alignment implementation. dma_get_cache_alignment returns the minimum DMA alignment. Architectures define it as ARCH_KMALLOC_MINALIGN (it's used to make sure that malloc'ed buffer is DMA-safe; the buffer doesn't share a cache with the others). So we can unify dma_get_cache_alignment implementations. This patch: dma_get_cache_alignment() needs to know if an architecture defines ARCH_KMALLOC_MINALIGN or not (needs to know if architecture has DMA alignment restriction). However, slab.h define ARCH_KMALLOC_MINALIGN if architectures doesn't define it. Let's rename ARCH_KMALLOC_MINALIGN to ARCH_DMA_MINALIGN. ARCH_KMALLOC_MINALIGN is used only in the internals of slab/slob/slub (except for crypto). Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
39 lines
972 B
C
39 lines
972 B
C
#ifndef __ASM_AVR32_CACHE_H
|
|
#define __ASM_AVR32_CACHE_H
|
|
|
|
#define L1_CACHE_SHIFT 5
|
|
#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_DMA_MINALIGN L1_CACHE_BYTES
|
|
|
|
#ifndef __ASSEMBLER__
|
|
struct cache_info {
|
|
unsigned int ways;
|
|
unsigned int sets;
|
|
unsigned int linesz;
|
|
};
|
|
#endif /* __ASSEMBLER */
|
|
|
|
/* Cache operation constants */
|
|
#define ICACHE_FLUSH 0x00
|
|
#define ICACHE_INVALIDATE 0x01
|
|
#define ICACHE_LOCK 0x02
|
|
#define ICACHE_UNLOCK 0x03
|
|
#define ICACHE_PREFETCH 0x04
|
|
|
|
#define DCACHE_FLUSH 0x08
|
|
#define DCACHE_LOCK 0x09
|
|
#define DCACHE_UNLOCK 0x0a
|
|
#define DCACHE_INVALIDATE 0x0b
|
|
#define DCACHE_CLEAN 0x0c
|
|
#define DCACHE_CLEAN_INVAL 0x0d
|
|
|
|
#endif /* __ASM_AVR32_CACHE_H */
|