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270 lines
11 KiB
270 lines
11 KiB
/****************************************************************************** |
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* @file mpu_armv7.h |
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* @brief CMSIS MPU API for Armv7-M MPU |
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* @version V5.0.4 |
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* @date 10. January 2018 |
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******************************************************************************/ |
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/* |
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* Copyright (c) 2017-2018 Arm Limited. All rights reserved. |
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* |
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* SPDX-License-Identifier: Apache-2.0 |
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* |
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* Licensed under the Apache License, Version 2.0 (the License); you may |
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* not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an AS IS BASIS, WITHOUT |
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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#if defined ( __ICCARM__ ) |
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#pragma system_include /* treat file as system include file for MISRA check */ |
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#elif defined (__clang__) |
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#pragma clang system_header /* treat file as system include file */ |
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#endif |
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#ifndef ARM_MPU_ARMV7_H |
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#define ARM_MPU_ARMV7_H |
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#define ARM_MPU_REGION_SIZE_32B ((uint8_t)0x04U) ///!< MPU Region Size 32 Bytes |
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#define ARM_MPU_REGION_SIZE_64B ((uint8_t)0x05U) ///!< MPU Region Size 64 Bytes |
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#define ARM_MPU_REGION_SIZE_128B ((uint8_t)0x06U) ///!< MPU Region Size 128 Bytes |
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#define ARM_MPU_REGION_SIZE_256B ((uint8_t)0x07U) ///!< MPU Region Size 256 Bytes |
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#define ARM_MPU_REGION_SIZE_512B ((uint8_t)0x08U) ///!< MPU Region Size 512 Bytes |
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#define ARM_MPU_REGION_SIZE_1KB ((uint8_t)0x09U) ///!< MPU Region Size 1 KByte |
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#define ARM_MPU_REGION_SIZE_2KB ((uint8_t)0x0AU) ///!< MPU Region Size 2 KBytes |
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#define ARM_MPU_REGION_SIZE_4KB ((uint8_t)0x0BU) ///!< MPU Region Size 4 KBytes |
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#define ARM_MPU_REGION_SIZE_8KB ((uint8_t)0x0CU) ///!< MPU Region Size 8 KBytes |
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#define ARM_MPU_REGION_SIZE_16KB ((uint8_t)0x0DU) ///!< MPU Region Size 16 KBytes |
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#define ARM_MPU_REGION_SIZE_32KB ((uint8_t)0x0EU) ///!< MPU Region Size 32 KBytes |
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#define ARM_MPU_REGION_SIZE_64KB ((uint8_t)0x0FU) ///!< MPU Region Size 64 KBytes |
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#define ARM_MPU_REGION_SIZE_128KB ((uint8_t)0x10U) ///!< MPU Region Size 128 KBytes |
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#define ARM_MPU_REGION_SIZE_256KB ((uint8_t)0x11U) ///!< MPU Region Size 256 KBytes |
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#define ARM_MPU_REGION_SIZE_512KB ((uint8_t)0x12U) ///!< MPU Region Size 512 KBytes |
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#define ARM_MPU_REGION_SIZE_1MB ((uint8_t)0x13U) ///!< MPU Region Size 1 MByte |
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#define ARM_MPU_REGION_SIZE_2MB ((uint8_t)0x14U) ///!< MPU Region Size 2 MBytes |
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#define ARM_MPU_REGION_SIZE_4MB ((uint8_t)0x15U) ///!< MPU Region Size 4 MBytes |
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#define ARM_MPU_REGION_SIZE_8MB ((uint8_t)0x16U) ///!< MPU Region Size 8 MBytes |
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#define ARM_MPU_REGION_SIZE_16MB ((uint8_t)0x17U) ///!< MPU Region Size 16 MBytes |
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#define ARM_MPU_REGION_SIZE_32MB ((uint8_t)0x18U) ///!< MPU Region Size 32 MBytes |
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#define ARM_MPU_REGION_SIZE_64MB ((uint8_t)0x19U) ///!< MPU Region Size 64 MBytes |
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#define ARM_MPU_REGION_SIZE_128MB ((uint8_t)0x1AU) ///!< MPU Region Size 128 MBytes |
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#define ARM_MPU_REGION_SIZE_256MB ((uint8_t)0x1BU) ///!< MPU Region Size 256 MBytes |
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#define ARM_MPU_REGION_SIZE_512MB ((uint8_t)0x1CU) ///!< MPU Region Size 512 MBytes |
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#define ARM_MPU_REGION_SIZE_1GB ((uint8_t)0x1DU) ///!< MPU Region Size 1 GByte |
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#define ARM_MPU_REGION_SIZE_2GB ((uint8_t)0x1EU) ///!< MPU Region Size 2 GBytes |
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#define ARM_MPU_REGION_SIZE_4GB ((uint8_t)0x1FU) ///!< MPU Region Size 4 GBytes |
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#define ARM_MPU_AP_NONE 0U ///!< MPU Access Permission no access |
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#define ARM_MPU_AP_PRIV 1U ///!< MPU Access Permission privileged access only |
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#define ARM_MPU_AP_URO 2U ///!< MPU Access Permission unprivileged access read-only |
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#define ARM_MPU_AP_FULL 3U ///!< MPU Access Permission full access |
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#define ARM_MPU_AP_PRO 5U ///!< MPU Access Permission privileged access read-only |
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#define ARM_MPU_AP_RO 6U ///!< MPU Access Permission read-only access |
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/** MPU Region Base Address Register Value |
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* |
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* \param Region The region to be configured, number 0 to 15. |
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* \param BaseAddress The base address for the region. |
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*/ |
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#define ARM_MPU_RBAR(Region, BaseAddress) \ |
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(((BaseAddress) & MPU_RBAR_ADDR_Msk) | \ |
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((Region) & MPU_RBAR_REGION_Msk) | \ |
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(MPU_RBAR_VALID_Msk)) |
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/** |
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* MPU Memory Access Attributes |
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* |
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* \param TypeExtField Type extension field, allows you to configure memory access type, for example strongly ordered, peripheral. |
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* \param IsShareable Region is shareable between multiple bus masters. |
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* \param IsCacheable Region is cacheable, i.e. its value may be kept in cache. |
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* \param IsBufferable Region is bufferable, i.e. using write-back caching. Cacheable but non-bufferable regions use write-through policy. |
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*/ |
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#define ARM_MPU_ACCESS_(TypeExtField, IsShareable, IsCacheable, IsBufferable) \ |
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((((TypeExtField ) << MPU_RASR_TEX_Pos) & MPU_RASR_TEX_Msk) | \ |
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(((IsShareable ) << MPU_RASR_S_Pos) & MPU_RASR_S_Msk) | \ |
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(((IsCacheable ) << MPU_RASR_C_Pos) & MPU_RASR_C_Msk) | \ |
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(((IsBufferable ) << MPU_RASR_B_Pos) & MPU_RASR_B_Msk)) |
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/** |
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* MPU Region Attribute and Size Register Value |
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* |
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* \param DisableExec Instruction access disable bit, 1= disable instruction fetches. |
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* \param AccessPermission Data access permissions, allows you to configure read/write access for User and Privileged mode. |
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* \param AccessAttributes Memory access attribution, see \ref ARM_MPU_ACCESS_. |
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* \param SubRegionDisable Sub-region disable field. |
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* \param Size Region size of the region to be configured, for example 4K, 8K. |
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*/ |
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#define ARM_MPU_RASR_EX(DisableExec, AccessPermission, AccessAttributes, SubRegionDisable, Size) \ |
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((((DisableExec ) << MPU_RASR_XN_Pos) & MPU_RASR_XN_Msk) | \ |
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(((AccessPermission) << MPU_RASR_AP_Pos) & MPU_RASR_AP_Msk) | \ |
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(((AccessAttributes) ) & (MPU_RASR_TEX_Msk | MPU_RASR_S_Msk | MPU_RASR_C_Msk | MPU_RASR_B_Msk))) |
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/** |
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* MPU Region Attribute and Size Register Value |
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* |
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* \param DisableExec Instruction access disable bit, 1= disable instruction fetches. |
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* \param AccessPermission Data access permissions, allows you to configure read/write access for User and Privileged mode. |
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* \param TypeExtField Type extension field, allows you to configure memory access type, for example strongly ordered, peripheral. |
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* \param IsShareable Region is shareable between multiple bus masters. |
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* \param IsCacheable Region is cacheable, i.e. its value may be kept in cache. |
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* \param IsBufferable Region is bufferable, i.e. using write-back caching. Cacheable but non-bufferable regions use write-through policy. |
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* \param SubRegionDisable Sub-region disable field. |
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* \param Size Region size of the region to be configured, for example 4K, 8K. |
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*/ |
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#define ARM_MPU_RASR(DisableExec, AccessPermission, TypeExtField, IsShareable, IsCacheable, IsBufferable, SubRegionDisable, Size) \ |
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ARM_MPU_RASR_EX(DisableExec, AccessPermission, ARM_MPU_ACCESS_(TypeExtField, IsShareable, IsCacheable, IsBufferable), SubRegionDisable, Size) |
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/** |
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* MPU Memory Access Attribute for strongly ordered memory. |
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* - TEX: 000b |
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* - Shareable |
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* - Non-cacheable |
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* - Non-bufferable |
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*/ |
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#define ARM_MPU_ACCESS_ORDERED ARM_MPU_ACCESS_(0U, 1U, 0U, 0U) |
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/** |
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* MPU Memory Access Attribute for device memory. |
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* - TEX: 000b (if non-shareable) or 010b (if shareable) |
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* - Shareable or non-shareable |
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* - Non-cacheable |
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* - Bufferable (if shareable) or non-bufferable (if non-shareable) |
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* |
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* \param IsShareable Configures the device memory as shareable or non-shareable. |
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*/ |
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#define ARM_MPU_ACCESS_DEVICE(IsShareable) ((IsShareable) ? ARM_MPU_ACCESS_(0U, 1U, 0U, 1U) : ARM_MPU_ACCESS_(2U, 0U, 0U, 0U)) |
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/** |
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* MPU Memory Access Attribute for normal memory. |
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* - TEX: 1BBb (reflecting outer cacheability rules) |
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* - Shareable or non-shareable |
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* - Cacheable or non-cacheable (reflecting inner cacheability rules) |
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* - Bufferable or non-bufferable (reflecting inner cacheability rules) |
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* |
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* \param OuterCp Configures the outer cache policy. |
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* \param InnerCp Configures the inner cache policy. |
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* \param IsShareable Configures the memory as shareable or non-shareable. |
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*/ |
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#define ARM_MPU_ACCESS_NORMAL(OuterCp, InnerCp, IsShareable) ARM_MPU_ACCESS_((4U | (OuterCp)), IsShareable, ((InnerCp) & 2U), ((InnerCp) & 1U)) |
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/** |
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* MPU Memory Access Attribute non-cacheable policy. |
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*/ |
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#define ARM_MPU_CACHEP_NOCACHE 0U |
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/** |
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* MPU Memory Access Attribute write-back, write and read allocate policy. |
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*/ |
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#define ARM_MPU_CACHEP_WB_WRA 1U |
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/** |
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* MPU Memory Access Attribute write-through, no write allocate policy. |
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*/ |
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#define ARM_MPU_CACHEP_WT_NWA 2U |
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/** |
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* MPU Memory Access Attribute write-back, no write allocate policy. |
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*/ |
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#define ARM_MPU_CACHEP_WB_NWA 3U |
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/** |
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* Struct for a single MPU Region |
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*/ |
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typedef struct { |
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uint32_t RBAR; //!< The region base address register value (RBAR) |
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uint32_t RASR; //!< The region attribute and size register value (RASR) \ref MPU_RASR |
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} ARM_MPU_Region_t; |
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/** Enable the MPU. |
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* \param MPU_Control Default access permissions for unconfigured regions. |
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*/ |
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__STATIC_INLINE void ARM_MPU_Enable(uint32_t MPU_Control) |
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{ |
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__DSB(); |
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__ISB(); |
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MPU->CTRL = MPU_Control | MPU_CTRL_ENABLE_Msk; |
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#ifdef SCB_SHCSR_MEMFAULTENA_Msk |
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SCB->SHCSR |= SCB_SHCSR_MEMFAULTENA_Msk; |
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#endif |
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} |
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/** Disable the MPU. |
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*/ |
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__STATIC_INLINE void ARM_MPU_Disable(void) |
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{ |
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__DSB(); |
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__ISB(); |
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#ifdef SCB_SHCSR_MEMFAULTENA_Msk |
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SCB->SHCSR &= ~SCB_SHCSR_MEMFAULTENA_Msk; |
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#endif |
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MPU->CTRL &= ~MPU_CTRL_ENABLE_Msk; |
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} |
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/** Clear and disable the given MPU region. |
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* \param rnr Region number to be cleared. |
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*/ |
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__STATIC_INLINE void ARM_MPU_ClrRegion(uint32_t rnr) |
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{ |
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MPU->RNR = rnr; |
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MPU->RASR = 0U; |
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} |
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/** Configure an MPU region. |
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* \param rbar Value for RBAR register. |
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* \param rsar Value for RSAR register. |
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*/ |
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__STATIC_INLINE void ARM_MPU_SetRegion(uint32_t rbar, uint32_t rasr) |
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{ |
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MPU->RBAR = rbar; |
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MPU->RASR = rasr; |
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} |
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/** Configure the given MPU region. |
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* \param rnr Region number to be configured. |
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* \param rbar Value for RBAR register. |
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* \param rsar Value for RSAR register. |
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*/ |
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__STATIC_INLINE void ARM_MPU_SetRegionEx(uint32_t rnr, uint32_t rbar, uint32_t rasr) |
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{ |
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MPU->RNR = rnr; |
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MPU->RBAR = rbar; |
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MPU->RASR = rasr; |
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} |
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/** Memcopy with strictly ordered memory access, e.g. for register targets. |
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* \param dst Destination data is copied to. |
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* \param src Source data is copied from. |
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* \param len Amount of data words to be copied. |
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*/ |
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__STATIC_INLINE void orderedCpy(volatile uint32_t* dst, const uint32_t* __RESTRICT src, uint32_t len) |
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{ |
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uint32_t i; |
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for (i = 0U; i < len; ++i) |
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{ |
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dst[i] = src[i]; |
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} |
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} |
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/** Load the given number of MPU regions from a table. |
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* \param table Pointer to the MPU configuration table. |
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* \param cnt Amount of regions to be configured. |
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*/ |
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__STATIC_INLINE void ARM_MPU_Load(ARM_MPU_Region_t const* table, uint32_t cnt) |
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{ |
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const uint32_t rowWordSize = sizeof(ARM_MPU_Region_t)/4U; |
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while (cnt > MPU_TYPE_RALIASES) { |
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orderedCpy(&(MPU->RBAR), &(table->RBAR), MPU_TYPE_RALIASES*rowWordSize); |
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table += MPU_TYPE_RALIASES; |
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cnt -= MPU_TYPE_RALIASES; |
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} |
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orderedCpy(&(MPU->RBAR), &(table->RBAR), cnt*rowWordSize); |
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} |
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#endif
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