From 622a9edd919de98ef59571ae6c40c7458244e3f2 Mon Sep 17 00:00:00 2001 From: Ralf Baechle Date: Tue, 16 Oct 2007 23:29:42 -0700 Subject: Remove dma_cache_(wback|inv|wback_inv) functions dma_cache_(wback|inv|wback_inv) were the earliest attempt on a generalized cache managment API for I/O purposes. Originally it was basically the raw MIPS low level cache API exported to the entire world. The API has suffered from a lack of documentation, was not very widely used unlike it's more modern brothers and can easily be replaced by dma_cache_sync. So remove it rsp. turn the surviving bits back into an arch private API, as discussed on linux-arch. Signed-off-by: Ralf Baechle Acked-by: Paul Mundt Acked-by: Paul Mackerras Acked-by: David S. Miller Acked-by: Kyle McMartin Acked-by: Haavard Skinnemoen Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-sh64/io.h | 48 ------------------------------------------------ 1 file changed, 48 deletions(-) (limited to 'include/asm-sh64/io.h') diff --git a/include/asm-sh64/io.h b/include/asm-sh64/io.h index 3de3ad99f457..7bd7314d38c2 100644 --- a/include/asm-sh64/io.h +++ b/include/asm-sh64/io.h @@ -181,54 +181,6 @@ extern void iounmap(void *addr); unsigned long onchip_remap(unsigned long addr, unsigned long size, const char* name); 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 -- cgit v1.2.3