soc/st/stm32/stm32h7x/mpu_regions.c

/*
 * Copyright (c) 2020 Mario Jaun
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#include <zephyr/devicetree.h>
#include <zephyr/arch/arm/cortex_m/arm_mpu_mem_cfg.h>

static const struct arm_mpu_region mpu_regions[] = {
	MPU_REGION_ENTRY("FLASH", CONFIG_FLASH_BASE_ADDRESS,
					 REGION_FLASH_ATTR(REGION_FLASH_SIZE)),
	MPU_REGION_ENTRY("SRAM", CONFIG_SRAM_BASE_ADDRESS,
					 REGION_RAM_ATTR(REGION_SRAM_SIZE)),
	/*
	 * System memory attributes inhibit the speculative fetch,
	 * preventing the RDSERR Flash error
	 */
	MPU_REGION_ENTRY("SYSTEM", 0x1FF00000,
					{ (STRONGLY_ORDERED_SHAREABLE |
					REGION_512K |
					MPU_RASR_XN_Msk | P_RW_U_NA_Msk) }),

#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(mac))

#if DT_NODE_HAS_STATUS_OKAY(DT_NODELABEL(sram3))
#define sram_eth_node	DT_NODELABEL(sram3)
#else
#define sram_eth_node	DT_NODELABEL(sram2)
#endif

#if DT_NODE_HAS_STATUS_OKAY(sram_eth_node)
	MPU_REGION_ENTRY("SRAM_ETH_BUF",
					 DT_REG_ADDR(sram_eth_node),
					 REGION_RAM_NOCACHE_ATTR(REGION_16K)),
	MPU_REGION_ENTRY("SRAM_ETH_DESC",
					 DT_REG_ADDR(sram_eth_node),
					 REGION_PPB_ATTR(REGION_256B)),
#endif
#endif
};

const struct arm_mpu_config mpu_config = {
	.num_regions = ARRAY_SIZE(mpu_regions),
	.mpu_regions = mpu_regions,
};