1 files changed, 28 insertions, 0 deletions
diff --git a/arch/nds32/include/asm/dma-mapping.h b/arch/nds32/include/asm/dma-mapping.h
new file mode 100644
index 0000000..e6808dc
--- /dev/null
+++ b/arch/nds32/include/asm/dma-mapping.h
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2013 Andes Technology Corporation
+ * Ken Kuo, Andes Technology Corporation <ken_kuo@andestech.com>
+ */
+#ifndef __ASM_NDS_DMA_MAPPING_H
+#define __ASM_NDS_DMA_MAPPING_H
+
+#include <linux/dma-direction.h>
+
+static void *dma_alloc_coherent(size_t len, unsigned long *handle)
+{
+	*handle = (unsigned long)memalign(ARCH_DMA_MINALIGN, len);
+	return (void *)*handle;
+}
+
+static inline unsigned long dma_map_single(volatile void *vaddr, size_t len,
+					   enum dma_data_direction dir)
+{
+	return (unsigned long)vaddr;
+}
+
+static inline void dma_unmap_single(volatile void *vaddr, size_t len,
+				    unsigned long paddr)
+{
+}
+
+#endif /* __ASM_NDS_DMA_MAPPING_H */