建立工程，成功创建两个虚拟串口

source/OpenAMP/libmetal/lib/processor/aarch64/CMakeLists.txt

@@ -0,0 +1,4 @@
+collect (PROJECT_LIB_HEADERS atomic.h)
+collect (PROJECT_LIB_HEADERS cpu.h)
+
+# vim: expandtab:ts=2:sw=2:smartindent

source/OpenAMP/libmetal/lib/processor/aarch64/atomic.h

@@ -0,0 +1,15 @@
+/*
+ * Copyright (c) 2015, Xilinx Inc. and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/*
+ * @file	gcc/atomic.h
+ * @brief	GCC specific atomic primitives for libmetal.
+ */
+
+#ifndef __METAL_AARCH64_ATOMIC__H__
+#define __METAL_AARCH64_ATOMIC__H__
+
+#endif /* __METAL_ARM_ATOMIC__H__ */

source/OpenAMP/libmetal/lib/processor/aarch64/cpu.h

@@ -0,0 +1,17 @@
+/*
+ * Copyright (c) 2015, Xilinx Inc. and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/*
+ * @file	cpu.h
+ * @brief	CPU specific primatives
+ */
+
+#ifndef __METAL_AARCH64_CPU__H__
+#define __METAL_AARCH64_CPU__H__
+
+#define metal_cpu_yield() asm volatile("yield")
+
+#endif /* __METAL_AARCH64_CPU__H__ */