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diff --git a/os/common/ports/ARMCMx/devices/K20x/cmparams.h b/os/common/ports/ARMCMx/devices/K20x/cmparams.h
new file mode 100644
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--- /dev/null
+++ b/os/common/ports/ARMCMx/devices/K20x/cmparams.h
@@ -0,0 +1,79 @@
+/*
+    ChibiOS - Copyright (C) 2006..2015 Giovanni Di Sirio
+
+    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.
+*/
+
+/**
+ * @file    GCC/ARMCMx/MK20Dx/cmparams.h
+ * @brief   ARM Cortex-M4 parameters for the Kinetis MK20Dx.
+ *
+ * @defgroup ARMCMx_MK20Dx Kinetis MK20Dx Specific Parameters
+ * @ingroup ARMCMx_SPECIFIC
+ * @details This file contains the Cortex-M4 specific parameters for the
+ *          Kinetis MK20Dx platform.
+ * @{
+ */
+
+#ifndef _CMPARAMS_H_
+#define _CMPARAMS_H_
+
+/**
+ * @brief   Cortex core model.
+ */
+#define CORTEX_MODEL            4
+
+/**
+ * @brief   Systick unit presence.
+ */
+#define CORTEX_HAS_ST           TRUE
+
+/**
+ * @brief   Floating Point unit presence.
+ */
+#define CORTEX_HAS_FPU          FALSE
+
+/**
+ * @brief   Number of bits in priority masks.
+ */
+#define CORTEX_PRIORITY_BITS    4
+
+/**
+ * @brief   Number of interrupt vectors.
+ * @note    This number does not include the 16 system vectors and must be
+ *          rounded to a multiple of 8.
+ */
+#define CORTEX_NUM_VECTORS      48
+
+/* The following code is not processed when the file is included from an
+   asm module.*/
+#if !defined(_FROM_ASM_)
+
+/* Including the device CMSIS header. Note, we are not using the definitions
+   from this header because we need this file to be usable also from
+   assembler source files. We verify that the info matches instead.*/
+#include "mk20d5.h"
+
+#if CORTEX_MODEL != __CORTEX_M
+#error "CMSIS __CORTEX_M mismatch"
+#endif
+
+#if CORTEX_PRIORITY_BITS != __NVIC_PRIO_BITS
+#error "CMSIS __NVIC_PRIO_BITS mismatch"
+#endif
+
+#endif /* !defined(_FROM_ASM_) */
+
+#endif /* _CMPARAMS_H_ */
+
+/** @} */