1 /* 2 * Copyright (c) 2017 Synopsys. 3 * 4 * SPDX-License-Identifier: Apache-2.0 5 */ 6 #ifndef ZEPHYR_INCLUDE_ARCH_ARC_V2_MPU_ARC_CORE_MPU_H_ 7 #define ZEPHYR_INCLUDE_ARCH_ARC_V2_MPU_ARC_CORE_MPU_H_ 8 9 #ifdef __cplusplus 10 extern "C" { 11 #endif 12 13 /* 14 * The defines below represent the region types. The MPU driver is responsible 15 * to allocate the region accordingly to the type and set the correct 16 * attributes. 17 * 18 * Each MPU is different and has a different set of attributes, hence instead 19 * of having the attributes at this level the arc_mpu_core defines the intent 20 * types. 21 * An intent type (i.e. THREAD_STACK_GUARD) can correspond to a different set 22 * of operations and attributes for each MPU and it is responsibility of the 23 * MPU driver to select the correct ones. 24 * 25 * The intent based configuration can't fail hence at this level no error 26 * is returned by the configuration functions. 27 * If one of the operations corresponding to an intent fails the error has to 28 * be managed inside the MPU driver and not escalated. 29 */ 30 /* Thread Region Intent Type */ 31 #define THREAD_STACK_USER_REGION 0x0 32 #define THREAD_STACK_REGION 0x1 33 #define THREAD_APP_DATA_REGION 0x2 34 #define THREAD_STACK_GUARD_REGION 0x3 35 #define THREAD_DOMAIN_PARTITION_REGION 0x4 36 37 #if defined(CONFIG_ARC_CORE_MPU) 38 /* ARC Core MPU Driver API */ 39 40 /* 41 * This API has to be implemented by all the MPU drivers that have 42 * ARC_CORE_MPU support. 43 */ 44 45 /** 46 * @brief enable the MPU 47 */ 48 void arc_core_mpu_enable(void); 49 50 /** 51 * @brief disable the MPU 52 */ 53 void arc_core_mpu_disable(void); 54 55 /** 56 * @brief configure the thread's mpu regions 57 * 58 * @param thread the target thread 59 */ 60 void arc_core_mpu_configure_thread(struct k_thread *thread); 61 62 /* 63 * Before configure the MPU regions, MPU should be disabled 64 */ 65 /** 66 * @brief configure the default region 67 * 68 * @param region_attr region attribute of default region 69 */ 70 void arc_core_mpu_default(uint32_t region_attr); 71 72 /** 73 * @brief configure the MPU region 74 * 75 * @param index MPU region index 76 * @param base base address 77 * @param size size of region 78 * @param region_attr region attribute 79 */ 80 int arc_core_mpu_region(uint32_t index, uint32_t base, uint32_t size, 81 uint32_t region_attr); 82 83 #endif /* CONFIG_ARC_CORE_MPU */ 84 85 #if defined(CONFIG_USERSPACE) 86 void arc_core_mpu_configure_mem_domain(struct k_thread *thread); 87 void arc_core_mpu_remove_mem_domain(struct k_mem_domain *mem_domain); 88 void arc_core_mpu_remove_mem_partition(struct k_mem_domain *domain, 89 uint32_t partition_id); 90 int arc_core_mpu_get_max_domain_partition_regions(void); 91 int arc_core_mpu_buffer_validate(const void *addr, size_t size, int write); 92 93 #endif 94 95 void configure_mpu_thread(struct k_thread *thread); 96 97 #ifdef __cplusplus 98 } 99 #endif 100 101 #endif /* ZEPHYR_INCLUDE_ARCH_ARC_V2_MPU_ARC_CORE_MPU_H_ */ 102
