diff options
Diffstat (limited to 'arch/arm/include/asm/cache.h')
| -rw-r--r-- | arch/arm/include/asm/cache.h | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/arch/arm/include/asm/cache.h b/arch/arm/include/asm/cache.h index cb7a9e97fd7..75fe66bc02b 100644 --- a/arch/arm/include/asm/cache.h +++ b/arch/arm/include/asm/cache.h @@ -4,7 +4,25 @@ #ifndef __ASMARM_CACHE_H #define __ASMARM_CACHE_H -#define L1_CACHE_SHIFT 5 +#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_DMA_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 + +#define __read_mostly __attribute__((__section__(".data..read_mostly"))) + #endif |