diff options
Diffstat (limited to 'arch/arm/include/asm/cache.h')
-rw-r--r-- | arch/arm/include/asm/cache.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/arm/include/asm/cache.h b/arch/arm/include/asm/cache.h new file mode 100644 index 0000000000..e3ea34558a --- /dev/null +++ b/arch/arm/include/asm/cache.h @@ -0,0 +1,29 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * 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_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 __section(".data..read_mostly") + +#endif |