建立工程，成功创建两个虚拟串口

source/OpenAMP/libmetal/lib/system/zephyr/device.c

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+/*
+ * Copyright (c) 2017, Linaro Limited. and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/*
+ * @file	zephyr/device.c
+ * @brief	Zephyr libmetal device definitions.
+ */
+
+#include <metal/device.h>
+#include <metal/sys.h>
+#include <metal/utilities.h>
+
+int metal_generic_dev_sys_open(struct metal_device *dev)
+{
+	metal_unused(dev);
+
+	/* Since Zephyr runs bare-metal there is no mapping that needs to be
+	 * done of IO regions
+	 */
+	return 0;
+}
+
+struct metal_bus metal_generic_bus = {
+	.name = "generic",
+	.ops  = {
+		.bus_close = NULL,
+		.dev_open  = metal_generic_dev_open,
+		.dev_close = NULL,
+		.dev_irq_ack = NULL,
+		.dev_dma_map = NULL,
+		.dev_dma_unmap = NULL,
+	},
+};