建立工程，成功创建两个虚拟串口

source/OpenAMP/libmetal/lib/system/zephyr/io.h

@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2017, Linaro Limited. and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/*
+ * @file	zephyr/io.h
+ * @brief	Zephyr specific io definitions.
+ */
+
+#ifndef __METAL_IO__H__
+#error "Include metal/io.h instead of metal/zephyr/io.h"
+#endif
+
+#ifndef __METAL_ZEPHYR_IO__H__
+#define __METAL_ZEPHYR_IO__H__
+
+#include <stdlib.h>
+#include <metal/utilities.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef METAL_INTERNAL
+
+/**
+ * @brief memory mapping for an I/O region
+ */
+static inline void metal_sys_io_mem_map(struct metal_io_region *io)
+{
+	metal_unused(io);
+}
+
+/**
+ * @brief memory mapping
+ */
+static inline void *metal_machine_io_mem_map(void *va, metal_phys_addr_t pa,
+					     size_t size, unsigned int flags)
+{
+	metal_unused(pa);
+	metal_unused(size);
+	metal_unused(flags);
+
+	return va;
+}
+
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __METAL_ZEPHYR_IO__H__ */