GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

2026-09-06 03:52:57 +08:00
commit b1928b41c0
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+/* 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 */