| /****************************************************************************** |
| * @file mpu_armv7.h |
| * @brief CMSIS MPU API for ARMv7 MPU |
| * @version V5.0.2 |
| * @date 09. June 2017 |
| ******************************************************************************/ |
| /* |
| * Copyright (c) 2017 ARM Limited. All rights reserved. |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| * |
| * 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 |
| * |
| * 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. |
| */ |
| |
| #ifndef ARM_MPU_ARMV7_H |
| #define ARM_MPU_ARMV7_H |
| |
| #define ARM_MPU_REGION_SIZE_32B ((uint8_t)0x04U) |
| #define ARM_MPU_REGION_SIZE_64B ((uint8_t)0x05U) |
| #define ARM_MPU_REGION_SIZE_128B ((uint8_t)0x06U) |
| #define ARM_MPU_REGION_SIZE_256B ((uint8_t)0x07U) |
| #define ARM_MPU_REGION_SIZE_512B ((uint8_t)0x08U) |
| #define ARM_MPU_REGION_SIZE_1KB ((uint8_t)0x09U) |
| #define ARM_MPU_REGION_SIZE_2KB ((uint8_t)0x0AU) |
| #define ARM_MPU_REGION_SIZE_4KB ((uint8_t)0x0BU) |
| #define ARM_MPU_REGION_SIZE_8KB ((uint8_t)0x0CU) |
| #define ARM_MPU_REGION_SIZE_16KB ((uint8_t)0x0DU) |
| #define ARM_MPU_REGION_SIZE_32KB ((uint8_t)0x0EU) |
| #define ARM_MPU_REGION_SIZE_64KB ((uint8_t)0x0FU) |
| #define ARM_MPU_REGION_SIZE_128KB ((uint8_t)0x10U) |
| #define ARM_MPU_REGION_SIZE_256KB ((uint8_t)0x11U) |
| #define ARM_MPU_REGION_SIZE_512KB ((uint8_t)0x12U) |
| #define ARM_MPU_REGION_SIZE_1MB ((uint8_t)0x13U) |
| #define ARM_MPU_REGION_SIZE_2MB ((uint8_t)0x14U) |
| #define ARM_MPU_REGION_SIZE_4MB ((uint8_t)0x15U) |
| #define ARM_MPU_REGION_SIZE_8MB ((uint8_t)0x16U) |
| #define ARM_MPU_REGION_SIZE_16MB ((uint8_t)0x17U) |
| #define ARM_MPU_REGION_SIZE_32MB ((uint8_t)0x18U) |
| #define ARM_MPU_REGION_SIZE_64MB ((uint8_t)0x19U) |
| #define ARM_MPU_REGION_SIZE_128MB ((uint8_t)0x1AU) |
| #define ARM_MPU_REGION_SIZE_256MB ((uint8_t)0x1BU) |
| #define ARM_MPU_REGION_SIZE_512MB ((uint8_t)0x1CU) |
| #define ARM_MPU_REGION_SIZE_1GB ((uint8_t)0x1DU) |
| #define ARM_MPU_REGION_SIZE_2GB ((uint8_t)0x1EU) |
| #define ARM_MPU_REGION_SIZE_4GB ((uint8_t)0x1FU) |
| |
| #define ARM_MPU_AP_NONE 0u |
| #define ARM_MPU_AP_PRIV 1u |
| #define ARM_MPU_AP_URO 2u |
| #define ARM_MPU_AP_FULL 3u |
| #define ARM_MPU_AP_PRO 5u |
| #define ARM_MPU_AP_RO 6u |
| |
| /** MPU Region Base Address Register Value |
| * |
| * \param Region The region to be configured, number 0 to 15. |
| * \param BaseAddress The base address for the region. |
| */ |
| #define ARM_MPU_RBAR(Region, BaseAddress) ((BaseAddress & MPU_RBAR_ADDR_Msk) | (Region & MPU_RBAR_REGION_Msk) | (1UL << MPU_RBAR_VALID_Pos)) |
| |
| /** |
| * MPU Region Attribut and Size Register Value |
| * |
| * \param DisableExec Instruction access disable bit, 1= disable instruction fetches. |
| * \param AccessPermission Data access permissions, allows you to configure read/write access for User and Privileged mode. |
| * \param TypeExtField Type extension field, allows you to configure memory access type, for example strongly ordered, peripheral. |
| * \param IsShareable Region is shareable between multiple bus masters. |
| * \param IsCacheable Region is cacheable, i.e. its value may be kept in cache. |
| * \param IsBufferable Region is bufferable, i.e. using write-back caching. Cacheable but non-bufferable regions use write-through policy. |
| * \param SubRegionDisable Sub-region disable field. |
| * \param Size Region size of the region to be configured, for example 4K, 8K. |
| */ |
| #define ARM_MPU_RASR(DisableExec, AccessPermission, TypeExtField, IsShareable, IsCacheable, IsBufferable, SubRegionDisable, Size) \ |
| ((DisableExec << MPU_RASR_XN_Pos) & MPU_RASR_XN_Msk) | \ |
| ((AccessPermission << MPU_RASR_AP_Pos) & MPU_RASR_AP_Msk) | \ |
| ((TypeExtField << MPU_RASR_TEX_Pos) & MPU_RASR_TEX_Msk) | \ |
| ((IsShareable << MPU_RASR_S_Pos) & MPU_RASR_S_Msk) | \ |
| ((IsCacheable << MPU_RASR_C_Pos) & MPU_RASR_C_Msk) | \ |
| ((IsBufferable << MPU_RASR_B_Pos) & MPU_RASR_B_Msk) | \ |
| ((SubRegionDisable << MPU_RASR_SRD_Pos) & MPU_RASR_SRD_Msk) | \ |
| ((Size << MPU_RASR_SIZE_Pos) & MPU_RASR_SIZE_Msk) | \ |
| ((1UL << MPU_RASR_ENABLE_Pos) & MPU_RASR_ENABLE_Msk) |
| |
| |
| /** |
| * Struct for a single MPU Region |
| */ |
| typedef struct _ARM_MPU_Region_t { |
| uint32_t RBAR; //!< The region base address register value (RBAR) |
| uint32_t RASR; //!< The region attribute and size register value (RASR) \ref MPU_RASR |
| } ARM_MPU_Region_t; |
| |
| /** Enable the MPU. |
| * \param MPU_Control Default access permissions for unconfigured regions. |
| */ |
| __STATIC_INLINE void ARM_MPU_Enable(uint32_t MPU_Control) |
| { |
| __DSB(); |
| __ISB(); |
| MPU->CTRL = MPU_Control | MPU_CTRL_ENABLE_Msk; |
| #ifdef SCB_SHCSR_MEMFAULTENA_Msk |
| SCB->SHCSR |= SCB_SHCSR_MEMFAULTENA_Msk; |
| #endif |
| } |
| |
| /** Disable the MPU. |
| */ |
| __STATIC_INLINE void ARM_MPU_Disable() |
| { |
| __DSB(); |
| __ISB(); |
| #ifdef SCB_SHCSR_MEMFAULTENA_Msk |
| SCB->SHCSR &= ~SCB_SHCSR_MEMFAULTENA_Msk; |
| #endif |
| MPU->CTRL &= ~MPU_CTRL_ENABLE_Msk; |
| } |
| |
| /** Clear and disable the given MPU region. |
| * \param rnr Region number to be cleared. |
| */ |
| __STATIC_INLINE void ARM_MPU_ClrRegion(uint32_t rnr) |
| { |
| MPU->RNR = rnr; |
| MPU->RASR = 0u; |
| } |
| |
| /** Configure an MPU region. |
| * \param rbar Value for RBAR register. |
| * \param rsar Value for RSAR register. |
| */ |
| __STATIC_INLINE void ARM_MPU_SetRegion(uint32_t rbar, uint32_t rasr) |
| { |
| MPU->RBAR = rbar; |
| MPU->RASR = rasr; |
| } |
| |
| /** Configure the given MPU region. |
| * \param rnr Region number to be configured. |
| * \param rbar Value for RBAR register. |
| * \param rsar Value for RSAR register. |
| */ |
| __STATIC_INLINE void ARM_MPU_SetRegionEx(uint32_t rnr, uint32_t rbar, uint32_t rasr) |
| { |
| MPU->RNR = rnr; |
| MPU->RBAR = rbar; |
| MPU->RASR = rasr; |
| } |
| |
| /** Memcopy with strictly ordered memory access, e.g. for register targets. |
| * \param dst Destination data is copied to. |
| * \param src Source data is copied from. |
| * \param len Amount of data words to be copied. |
| */ |
| __STATIC_INLINE void orderedCpy(volatile uint32_t* dst, const uint32_t* __RESTRICT src, uint32_t len) |
| { |
| uint32_t i; |
| for (i = 0u; i < len; ++i) |
| { |
| dst[i] = src[i]; |
| } |
| } |
| |
| /** Load the given number of MPU regions from a table. |
| * \param table Pointer to the MPU configuration table. |
| * \param cnt Amount of regions to be configured. |
| */ |
| __STATIC_INLINE void ARM_MPU_Load(ARM_MPU_Region_t const* table, uint32_t cnt) |
| { |
| orderedCpy(&(MPU->RBAR), &(table->RBAR), cnt*sizeof(ARM_MPU_Region_t)/4u); |
| } |
| |
| #endif |