1 /* Public domain. */ 2 3 #ifndef _LINUX_DMA_MAPPING_H 4 #define _LINUX_DMA_MAPPING_H 5 6 #include <linux/sizes.h> 7 #include <linux/scatterlist.h> 8 9 #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : (1ULL<<(n)) -1) 10 11 #define dma_set_coherent_mask(x, y) 0 12 #define dma_set_max_seg_size(x, y) 0 13 #define dma_set_mask(x, y) 0 14 #define dma_set_mask_and_coherent(x, y) 0 15 #define dma_addressing_limited(x) false 16 17 #endif 18