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-rw-r--r--arch/nds32/kernel/dma.c82
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);
-}