soc: mps2_an385: Added support for MPU

Added required files/support for the MPU in MPS2-AN358 (Cortex-M3).

Signed-off-by: Adithya Baglody <adithya.nagaraj.baglody@intel.com>
Signed-off-by: Anas Nashif <anas.nashif@intel.com>

soc/arm/arm/mps2/CMakeLists.txt

@@ -1,3 +1,4 @@
 zephyr_sources(
   soc.c
+  arm_mpu_regions.c
   )

soc/arm/arm/mps2/arm_mpu_regions.c

@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) 2017 Linaro Limited.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <generated_dts_board.h>
+
+#include <soc.h>
+#include <arch/arm/cortex_m/mpu/arm_mpu.h>
+
+static struct arm_mpu_region mpu_regions[] = {
+	/* Region 0 */
+	MPU_REGION_ENTRY("FLASH_0",
+			 CONFIG_FLASH_BASE_ADDRESS,
+			 REGION_FLASH_ATTR(REGION_4M)),
+
+	MPU_REGION_ENTRY("SRAM_0",
+			 CONFIG_SRAM_BASE_ADDRESS,
+			 REGION_RAM_ATTR(REGION_2M))
+};
+
+struct arm_mpu_config mpu_config = {
+	.num_regions = ARRAY_SIZE(mpu_regions),
+	.mpu_regions = mpu_regions,
+};

soc/arm/arm/mps2/soc.h

@@ -7,6 +7,7 @@
 #ifndef _SOC_H_
 #define _SOC_H_
 
+#define __MPU_PRESENT 1
 #include <soc_devices.h>
 
 #endif /* _SOC_H_ */

soc/arm/arm/mps2/soc_devices.h

@@ -9,8 +9,10 @@
 
 #ifndef _ASMLANGUAGE
 
+#include <stddef.h>
 #include "soc_registers.h"
 
+
 /* FPGA system control block (FPGAIO) */
 #define FPGAIO_BASE_ADDR	 (0x40028000)
 #define __MPS2_FPGAIO ((volatile struct mps2_fpgaio *)FPGAIO_BASE_ADDR)