Initial commit of firmware

Libs/platform/service/mpu/inc/sl_mpu.h

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+/***************************************************************************//**
+ * @file
+ * @brief MPU API definition.
+ *******************************************************************************
+ * # License
+ * <b>Copyright 2019 Silicon Laboratories Inc. www.silabs.com</b>
+ *******************************************************************************
+ *
+ * SPDX-License-Identifier: Zlib
+ *
+ * The licensor of this software is Silicon Laboratories Inc.
+ *
+ * This software is provided 'as-is', without any express or implied
+ * warranty. In no event will the authors be held liable for any damages
+ * arising from the use of this software.
+ *
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ *
+ * 1. The origin of this software must not be misrepresented; you must not
+ *    claim that you wrote the original software. If you use this software
+ *    in a product, an acknowledgment in the product documentation would be
+ *    appreciated but is not required.
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ *    misrepresented as being the original software.
+ * 3. This notice may not be removed or altered from any source distribution.
+ *
+ ******************************************************************************/
+
+/***************************************************************************//**
+ * @addtogroup mpu RAM execution disable
+ * @brief RAM execution disable utilities can be used to disable execution from
+ *        RAM and other selected memory regions.
+ * @details
+ *   RAM execution disable utilities are useful to protect against code
+ *   injection attacks.
+ *   These utilities make use of MPU to disable execution from RAM and other
+ *   selected memory regions.
+ *
+ * @{
+ ******************************************************************************/
+
+#ifndef SL_MPU_H
+#define SL_MPU_H
+
+#include "sl_status.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/***************************************************************************//**
+ * Configures internal SRAM as non-executable and enable MPU.
+ *
+ * @note This function configures the MPU in order to make the entire RAM as
+ *       non-executable (with the exception of the functions marked as ramfunc).
+ ******************************************************************************/
+void sl_mpu_disable_execute_from_ram(void);
+
+/***************************************************************************//**
+ * Configures an address range as non-executable and enable MPU.
+ *
+ * @note Configures a MPU region in order to make an address range as
+ *       non-executable. The memory region must have a size of at least 32 bytes.
+ *
+ * @param address_begin Beginning of memory segment.
+ *
+ * @param address_end   End of memory segment.
+ *
+ * @param size          Size of memory segment.
+ *
+ * @return 0 if successful. Error code otherwise.
+ ******************************************************************************/
+sl_status_t sl_mpu_disable_execute(uint32_t address_begin,
+                                   uint32_t address_end,
+                                   uint32_t size);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* SL_MPU_H */
+
+/** @} (end addtogroup mpu) */