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diff --git a/platform/ext/target/arm/mps3/an547/device/include/system_core_init.h b/platform/ext/target/arm/mps3/an547/device/include/system_core_init.h
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+++ b/platform/ext/target/arm/mps3/an547/device/include/system_core_init.h
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+/*
+ * Copyright (c) 2009-2020 Arm Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*
+ * This file is derivative of CMSIS V5.6.0 system_ARMv81MML.h
+ * Git SHA: b5f0603d6a584d1724d952fd8b0737458b90d62b
+ */
+
+#ifndef __SYSTEM_CORE_INIT_H__
+#define __SYSTEM_CORE_INIT_H__
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern uint32_t SystemCoreClock; /*!< System Clock Frequency (Core Clock) */
+extern uint32_t PeripheralClock; /*!< Peripheral Clock Frequency */
+
+/**
+ * \brief Initializes the system
+ */
+extern void SystemInit(void);
+
+/**
+ * \brief Restores system core clock
+ */
+extern void SystemCoreClockUpdate(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __SYSTEM_CORE_INIT_H__ */