1 files changed, 0 insertions, 82 deletions
diff --git a/arch/nds32/kernel/dma.c b/arch/nds32/kernel/dma.c
deleted file mode 100644
index 2ac8e6c82a61..000000000000
--- a/arch/nds32/kernel/dma.c
+++ /dev/null
@@ -1,82 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-// Copyright (C) 2005-2017 Andes Technology Corporation
-
-#include <linux/types.h>
-#include <linux/mm.h>
-#include <linux/dma-map-ops.h>
-#include <linux/cache.h>
-#include <linux/highmem.h>
-#include <asm/cacheflush.h>
-#include <asm/tlbflush.h>
-#include <asm/proc-fns.h>
-
-static inline void cache_op(phys_addr_t paddr, size_t size,
-		void (*fn)(unsigned long start, unsigned long end))
-{
-	struct page *page = pfn_to_page(paddr >> PAGE_SHIFT);
-	unsigned offset = paddr & ~PAGE_MASK;
-	size_t left = size;
-	unsigned long start;
-
-	do {
-		size_t len = left;
-
-		if (PageHighMem(page)) {
-			void *addr;
-
-			if (offset + len > PAGE_SIZE) {
-				if (offset >= PAGE_SIZE) {
-					page += offset >> PAGE_SHIFT;
-					offset &= ~PAGE_MASK;
-				}
-				len = PAGE_SIZE - offset;
-			}
-
-			addr = kmap_atomic(page);
-			start = (unsigned long)(addr + offset);
-			fn(start, start + len);
-			kunmap_atomic(addr);
-		} else {
-			start = (unsigned long)phys_to_virt(paddr);
-			fn(start, start + size);
-		}
-		offset = 0;
-		page++;
-		left -= len;
-	} while (left);
-}
-
-void arch_sync_dma_for_device(phys_addr_t paddr, size_t size,
-		enum dma_data_direction dir)
-{
-	switch (dir) {
-	case DMA_FROM_DEVICE:
-		break;
-	case DMA_TO_DEVICE:
-	case DMA_BIDIRECTIONAL:
-		cache_op(paddr, size, cpu_dma_wb_range);
-		break;
-	default:
-		BUG();
-	}
-}
-
-void arch_sync_dma_for_cpu(phys_addr_t paddr, size_t size,
-		enum dma_data_direction dir)
-{
-	switch (dir) {
-	case DMA_TO_DEVICE:
-		break;
-	case DMA_FROM_DEVICE:
-	case DMA_BIDIRECTIONAL:
-		cache_op(paddr, size, cpu_dma_inval_range);
-		break;
-	default:
-		BUG();
-	}
-}
-
-void arch_dma_prep_coherent(struct page *page, size_t size)
-{
-	cache_op(page_to_phys(page), size, cpu_dma_wbinval_range);
-}