| /* |
| * Copyright (c) 2020-2021 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. |
| */ |
| |
| /**************************************************************************** |
| * Includes |
| ****************************************************************************/ |
| |
| #include "mpu.hpp" |
| |
| #include <cachel1_armv7.h> |
| #include <inttypes.h> |
| #include <stdio.h> |
| |
| using namespace std; |
| |
| /**************************************************************************** |
| * Functions |
| ****************************************************************************/ |
| |
| namespace EthosU { |
| namespace Mpu { |
| |
| void dump() { |
| #ifdef ARM_MPU_ARMV8_H |
| uint32_t mpuRegions = (MPU->TYPE & MPU_TYPE_DREGION_Msk) >> MPU_TYPE_DREGION_Pos; |
| |
| printf("MPU available with " PRIu32 " regions.\n", mpuRegions); |
| |
| printf(" PRIVDEFENA : %lx\n", (MPU->CTRL & MPU_CTRL_PRIVDEFENA_Msk) >> MPU_CTRL_PRIVDEFENA_Pos); |
| printf(" HFNMIENA : %lx\n", (MPU->CTRL & MPU_CTRL_HFNMIENA_Msk) >> MPU_CTRL_HFNMIENA_Pos); |
| printf(" ENABLE : %lx\n", (MPU->CTRL & MPU_CTRL_ENABLE_Msk) >> MPU_CTRL_ENABLE_Pos); |
| |
| for (size_t region = 0; region < mpuRegions; region++) { |
| MPU->RNR = region; |
| printf("-- Region %2d - RBAR:%08" PRIx32 " RLAR:%08" PRIx32 "\n", region, MPU->RBAR, MPU->RLAR); |
| } |
| #endif |
| } |
| |
| static void initializeAttributes() { |
| #ifdef ARM_MPU_ARMV8_H |
| /* Initialize attributes corresponding to the enums defined in mpu.hpp */ |
| const uint8_t WTRA = |
| ARM_MPU_ATTR_MEMORY_(1, 0, 1, 0); // Non-transient, Write-Through, Read-allocate, Not Write-allocate |
| const uint8_t WBWARA = ARM_MPU_ATTR_MEMORY_(1, 1, 1, 1); // Non-transient, Write-Back, Read-allocate, Write-allocate |
| |
| ARM_MPU_SetMemAttr(WTRA_index, ARM_MPU_ATTR(WTRA, WTRA)); |
| ARM_MPU_SetMemAttr(WBWARA_index, ARM_MPU_ATTR(WBWARA, WBWARA)); |
| #endif |
| } |
| |
| void loadAndEnableConfig(ARM_MPU_Region_t const *table, uint32_t cnt) { |
| #ifdef ARM_MPU_ARMV8_H |
| initializeAttributes(); |
| |
| ARM_MPU_Load(0, table, cnt); |
| |
| // Enable MPU with default priv access to all other regions |
| ARM_MPU_Enable(MPU_CTRL_PRIVDEFENA_Msk); |
| #endif |
| } |
| |
| }; // namespace Mpu |
| }; // namespace EthosU |