diff options
Diffstat (limited to 'targets/corstone-300/mpu.cpp')
-rw-r--r-- | targets/corstone-300/mpu.cpp | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/targets/corstone-300/mpu.cpp b/targets/corstone-300/mpu.cpp new file mode 100644 index 0000000..645723c --- /dev/null +++ b/targets/corstone-300/mpu.cpp @@ -0,0 +1,79 @@ +/* + * 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 |