Zephyr API Documentation
4.0.0-rc2
A Scalable Open Source RTOS
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memory-attr.h
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/*
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* Copyright (c) 2023 Carlo Caione <ccaione@baylibre.com>
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef ZEPHYR_INCLUDE_DT_BINDINGS_MEM_ATTR_H_
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#define ZEPHYR_INCLUDE_DT_BINDINGS_MEM_ATTR_H_
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#include <
zephyr/sys/util_macro.h
>
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/*
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* Generic memory attributes.
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*
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* Generic memory attributes that should be common to all architectures.
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*/
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#define DT_MEM_ATTR_MASK GENMASK(15, 0)
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#define DT_MEM_ATTR_GET(x) ((x) & DT_MEM_ATTR_MASK)
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#define DT_MEM_ATTR_SHIFT (0)
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#define DT_MEM_CACHEABLE BIT(0)
/* cacheable */
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#define DT_MEM_NON_VOLATILE BIT(1)
/* non-volatile */
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#define DT_MEM_OOO BIT(2)
/* out-of-order */
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#define DT_MEM_DMA BIT(3)
/* DMA-able */
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#define DT_MEM_UNKNOWN BIT(15)
/* must be last */
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/* to be continued */
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/*
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* Software specific memory attributes.
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*
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* Software can define their own memory attributes if needed using the
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* provided mask.
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*/
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#define DT_MEM_SW_ATTR_MASK GENMASK(19, 16)
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#define DT_MEM_SW_ATTR_GET(x) ((x) & DT_MEM_SW_ATTR_MASK)
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#define DT_MEM_SW_ATTR_SHIFT (16)
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#define DT_MEM_SW_ATTR_UNKNOWN BIT(19)
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/*
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* Architecture specific memory attributes.
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*
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* Architectures can define their own memory attributes if needed using the
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* provided mask.
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*
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* See for example `include/zephyr/dt-bindings/memory-attr/memory-attr-arm.h`
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*/
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#define DT_MEM_ARCH_ATTR_MASK GENMASK(31, 20)
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#define DT_MEM_ARCH_ATTR_GET(x) ((x) & DT_MEM_ARCH_ATTR_MASK)
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#define DT_MEM_ARCH_ATTR_SHIFT (20)
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#define DT_MEM_ARCH_ATTR_UNKNOWN BIT(31)
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#endif
/* ZEPHYR_INCLUDE_DT_BINDINGS_MEM_ATTR_H_ */
util_macro.h
Macro utilities.
zephyr
dt-bindings
memory-attr
memory-attr.h
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