diff options
Diffstat (limited to 'include/asm-sh64/io.h')
-rw-r--r-- | include/asm-sh64/io.h | 48 |
1 files changed, 0 insertions, 48 deletions
diff --git a/include/asm-sh64/io.h b/include/asm-sh64/io.h index 3de3ad99f45..7bd7314d38c 100644 --- a/include/asm-sh64/io.h +++ b/include/asm-sh64/io.h @@ -182,54 +182,6 @@ unsigned long onchip_remap(unsigned long addr, unsigned long size, const char* n extern void onchip_unmap(unsigned long vaddr); /* - * The caches on some architectures aren't dma-coherent and have need to - * handle this in software. There are three types of operations that - * can be applied to dma buffers. - * - * - dma_cache_wback_inv(start, size) makes caches and RAM coherent by - * writing the content of the caches back to memory, if necessary. - * The function also invalidates the affected part of the caches as - * necessary before DMA transfers from outside to memory. - * - dma_cache_inv(start, size) invalidates the affected parts of the - * caches. Dirty lines of the caches may be written back or simply - * be discarded. This operation is necessary before dma operations - * to the memory. - * - dma_cache_wback(start, size) writes back any dirty lines but does - * not invalidate the cache. This can be used before DMA reads from - * memory, - */ - -static __inline__ void dma_cache_wback_inv (unsigned long start, unsigned long size) -{ - unsigned long s = start & L1_CACHE_ALIGN_MASK; - unsigned long e = (start + size) & L1_CACHE_ALIGN_MASK; - - for (; s <= e; s += L1_CACHE_BYTES) - asm volatile ("ocbp %0, 0" : : "r" (s)); -} - -static __inline__ void dma_cache_inv (unsigned long start, unsigned long size) -{ - // Note that caller has to be careful with overzealous - // invalidation should there be partial cache lines at the extremities - // of the specified range - unsigned long s = start & L1_CACHE_ALIGN_MASK; - unsigned long e = (start + size) & L1_CACHE_ALIGN_MASK; - - for (; s <= e; s += L1_CACHE_BYTES) - asm volatile ("ocbi %0, 0" : : "r" (s)); -} - -static __inline__ void dma_cache_wback (unsigned long start, unsigned long size) -{ - unsigned long s = start & L1_CACHE_ALIGN_MASK; - unsigned long e = (start + size) & L1_CACHE_ALIGN_MASK; - - for (; s <= e; s += L1_CACHE_BYTES) - asm volatile ("ocbwb %0, 0" : : "r" (s)); -} - -/* * Convert a physical pointer to a virtual kernel pointer for /dev/mem * access */ |