59 lines
1.4 KiB
C
59 lines
1.4 KiB
C
/*
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* Copyright (c) 2019 Synopsys.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr/device.h>
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#include <zephyr/init.h>
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#include <zephyr/kernel.h>
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#include <zephyr/arch/arc/v2/aux_regs.h>
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#include <zephyr/arch/arc/v2/mpu/arc_mpu.h>
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#include <zephyr/arch/arc/v2/mpu/arc_core_mpu.h>
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#include <zephyr/linker/linker-defs.h>
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#define LOG_LEVEL CONFIG_MPU_LOG_LEVEL
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#include <zephyr/logging/log.h>
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LOG_MODULE_REGISTER(mpu);
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/**
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* @brief Get the number of supported MPU regions
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*
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*/
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static inline uint8_t get_num_regions(void)
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{
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uint32_t num = z_arc_v2_aux_reg_read(_ARC_V2_MPU_BUILD);
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num = (num & 0xFF00U) >> 8U;
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return (uint8_t)num;
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}
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/**
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* This internal function is utilized by the MPU driver to parse the intent
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* type (i.e. THREAD_STACK_REGION) and return the correct parameter set.
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*/
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static inline uint32_t get_region_attr_by_type(uint32_t type)
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{
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switch (type) {
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case THREAD_STACK_USER_REGION:
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return REGION_RAM_ATTR;
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case THREAD_STACK_REGION:
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return AUX_MPU_ATTR_KW | AUX_MPU_ATTR_KR;
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case THREAD_APP_DATA_REGION:
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return REGION_RAM_ATTR;
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case THREAD_STACK_GUARD_REGION:
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/* no Write and Execute to guard region */
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return AUX_MPU_ATTR_UR | AUX_MPU_ATTR_KR;
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default:
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/* unknown type */
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return 0;
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}
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}
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#if (CONFIG_ARC_MPU_VER == 4) || (CONFIG_ARC_MPU_VER == 8)
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#include "arc_mpu_v4_internal.h"
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#else
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#include "arc_mpu_common_internal.h"
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#endif
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