memory-attr-arm.h

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/*
 * Copyright (c) 2023 Carlo Caione <ccaione@baylibre.com>
 * Copyright 2025 Arm Limited and/or its affiliates <open-source-office@arm.com>
 *
 * SPDX-License-Identifier: Apache-2.0
 */

 
#ifndef ZEPHYR_INCLUDE_DT_BINDINGS_MEM_ATTR_ARM_H_
#define ZEPHYR_INCLUDE_DT_BINDINGS_MEM_ATTR_ARM_H_
 
#include <zephyr/sys/util_macro.h>
#include <zephyr/dt-bindings/memory-attr/memory-attr.h>

 
/*
 * Architecture specific ARM MPU related attributes.
 *
 * This list is to seamlessly support the MPU regions configuration using DT and
 * the `zephyr,memory-attr` property.
 *
 * This is legacy and it should NOT be extended further. If new MPU region
 * types must be added, these must rely on the generic memory attributes.
 */

#define DT_MEM_ARM_MASK   DT_MEM_ARCH_ATTR_MASK
#define DT_MEM_ARM(x)     ((x) << DT_MEM_ARCH_ATTR_SHIFT)
 
#define ATTR_MPU_RAM         BIT(0)
#define ATTR_MPU_RAM_NOCACHE BIT(1)
#define ATTR_MPU_FLASH       BIT(2)
#define ATTR_MPU_PPB         BIT(3)
#define ATTR_MPU_IO          BIT(4)
#define ATTR_MPU_EXTMEM      BIT(5)
#define ATTR_MPU_RAM_PXN     BIT(6)
#define ATTR_MPU_DEVICE      BIT(7)
#define ATTR_MPU_RAM_WT      BIT(8)

#define DT_MEM_ARM_GET(x) ((x) & DT_MEM_ARM_MASK)

#define DT_MEM_ARM_MPU_RAM         DT_MEM_ARM(ATTR_MPU_RAM)
#define DT_MEM_ARM_MPU_RAM_NOCACHE DT_MEM_ARM(ATTR_MPU_RAM_NOCACHE)
#define DT_MEM_ARM_MPU_FLASH       DT_MEM_ARM(ATTR_MPU_FLASH)
#define DT_MEM_ARM_MPU_PPB         DT_MEM_ARM(ATTR_MPU_PPB)
#define DT_MEM_ARM_MPU_IO          DT_MEM_ARM(ATTR_MPU_IO)
#define DT_MEM_ARM_MPU_EXTMEM      DT_MEM_ARM(ATTR_MPU_EXTMEM)
#define DT_MEM_ARM_MPU_RAM_PXN     DT_MEM_ARM(ATTR_MPU_RAM_PXN)
#define DT_MEM_ARM_MPU_DEVICE      DT_MEM_ARM(ATTR_MPU_DEVICE)
#define DT_MEM_ARM_MPU_RAM_WT      DT_MEM_ARM(ATTR_MPU_RAM_WT)
#define DT_MEM_ARM_MPU_UNKNOWN     DT_MEM_ARCH_ATTR_UNKNOWN

 
#endif /* ZEPHYR_INCLUDE_DT_BINDINGS_MEM_ATTR_ARM_H_ */