From ae51f41d14f548d494ac41e0d21137c5a4c3f59c Mon Sep 17 00:00:00 2001
From: Iru Cai <mytbk920423@gmail.com>
Date: Wed, 30 Oct 2019 14:21:52 +0800
Subject: import the U-Boot code and make it compile

---
 arch/x86/include/asm/dma-mapping.h | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 arch/x86/include/asm/dma-mapping.h

(limited to 'arch/x86/include/asm/dma-mapping.h')

diff --git a/arch/x86/include/asm/dma-mapping.h b/arch/x86/include/asm/dma-mapping.h
new file mode 100644
index 0000000..b353ff0
--- /dev/null
+++ b/arch/x86/include/asm/dma-mapping.h
@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * (C) Copyright 2007
+ * Stelian Pop <stelian@popies.net>
+ * Lead Tech Design <www.leadtechdesign.com>
+ */
+#ifndef __ASM_X86_DMA_MAPPING_H
+#define __ASM_X86_DMA_MAPPING_H
+
+#include <linux/dma-direction.h>
+
+#define	dma_mapping_error(x, y)	0
+
+static inline void *dma_alloc_coherent(size_t len, unsigned long *handle)
+{
+	*handle = (unsigned long)memalign(ARCH_DMA_MINALIGN, len);
+	return (void *)*handle;
+}
+
+static inline void dma_free_coherent(void *addr)
+{
+	free(addr);
+}
+
+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_X86_DMA_MAPPING_H */
-- 
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