1 /* 2 * Copyright (c) 2021 Synopsys 3 * 4 * SPDX-License-Identifier: Apache-2.0 5 */ 6 7 #include <zephyr/devicetree.h> 8 #include <zephyr/arch/arc/v2/mpu/arc_mpu.h> 9 #include <zephyr/arch/arc/arch.h> 10 #include <zephyr/linker/linker-defs.h> 11 12 /* 13 * for secure firmware, MPU entries are only set up for secure world. 14 * All regions not listed here are shared by secure world and normal world. 15 */ 16 static struct arc_mpu_region mpu_regions[] = { 17 18 #if defined(CONFIG_COVERAGE_GCOV) && defined(CONFIG_USERSPACE) 19 /* Region Coverage */ 20 MPU_REGION_ENTRY("COVERAGE", 21 (uint32_t)&(__gcov_bss_start), 22 (uint32_t)&__gcov_bss_size, 23 REGION_IO_ATTR), 24 #endif /* CONFIG_COVERAGE_GCOV && CONFIG_USERSPACE */ 25 26 #if DT_REG_SIZE(DT_CHOSEN(zephyr_sram)) > 0 27 28 #ifdef CONFIG_XIP 29 /* Region RAM */ 30 MPU_REGION_ENTRY("RAM", 31 DT_REG_ADDR(DT_CHOSEN(zephyr_sram)), 32 DT_REG_SIZE(DT_CHOSEN(zephyr_sram)), 33 REGION_KERNEL_RAM_ATTR | REGION_DYNAMIC), 34 #else 35 /* Region RAM */ 36 /* 37 * In case if Zephyr is configured with CONFIG_XIP=n it linked into 38 * SRAM. So RAM region should have EXECUTE permission. 39 */ 40 MPU_REGION_ENTRY("RAM_RX", 41 (uintptr_t)__rom_region_start, 42 (uintptr_t)__rom_region_size, 43 REGION_ROM_ATTR), 44 45 MPU_REGION_ENTRY("RAM_RW", 46 (uintptr_t)_image_ram_start, 47 (uintptr_t)__arc_rw_sram_size, 48 REGION_KERNEL_RAM_ATTR | REGION_DYNAMIC), 49 #endif /* CONFIG_XIP */ 50 51 #endif /* zephyr_sram > 0 */ 52 53 #if DT_REG_SIZE(DT_CHOSEN(zephyr_flash)) > 0 54 /* Region DCCM */ 55 MPU_REGION_ENTRY("FLASH", 56 DT_REG_ADDR(DT_CHOSEN(zephyr_flash)), 57 DT_REG_SIZE(DT_CHOSEN(zephyr_flash)), 58 REGION_ROM_ATTR), 59 #endif 60 61 /* 62 * Region peripheral is shared by secure world and normal world by default, 63 * no need a static mpu entry. If some peripherals belong to secure world, 64 * add it here. 65 */ 66 #ifndef CONFIG_ARC_SECURE_FIRMWARE 67 /* Region Peripheral */ 68 MPU_REGION_ENTRY("PERIPHERAL", 69 0xF0000000, 70 64 * 1024, 71 REGION_KERNEL_RAM_ATTR), 72 #endif 73 }; 74 75 struct arc_mpu_config mpu_config = { 76 .num_regions = ARRAY_SIZE(mpu_regions), 77 .mpu_regions = mpu_regions, 78 }; 79
