65 lines
1.8 KiB
C
65 lines
1.8 KiB
C
/*
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* Copyright (c) 2021, Commonwealth Scientific and Industrial Research
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* Organisation (CSIRO) ABN 41 687 119 230.
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Generate memory regions from devicetree nodes.
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*/
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/**
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* @brief Get the linker memory-region name
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*
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* This attempts to use the zephyr,memory-region property, falling back
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* to the node path if it doesn't exist.
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*
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* Example devicetree fragment:
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*
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* / {
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* soc {
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* sram1: memory@2000000 {
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* zephyr,memory-region = "MY_NAME";
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* };
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* sram2: memory@2001000 { ... };
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* };
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* };
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*
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* Example usage:
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*
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* LINKER_DT_NODE_REGION_NAME(DT_NODELABEL(sram1)) // "MY_NAME"
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* LINKER_DT_NODE_REGION_NAME(DT_NODELABEL(sram2)) // "/soc/memory@2001000"
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*
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* @param node_id node identifier
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* @return the name of the memory memory region the node will generate
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*/
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#define LINKER_DT_NODE_REGION_NAME(node_id) \
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DT_PROP_OR(node_id, zephyr_memory_region, DT_NODE_PATH(node_id))
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/** @cond INTERNAL_HIDDEN */
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#define _DT_COMPATIBLE zephyr_memory_region
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/**
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* @brief Declare a memory region
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*
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* @param node_id devicetree node identifier
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* @param attr region attributes
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*/
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#define _REGION_DECLARE(node_id) \
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LINKER_DT_NODE_REGION_NAME(node_id) : \
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ORIGIN = DT_REG_ADDR(node_id), \
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LENGTH = DT_REG_SIZE(node_id)
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/** @endcond */
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/**
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* @brief Generate linker memory regions from the device tree nodes with
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* compatible 'zephyr,memory-region'
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*
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* Note: for now we do not deal with MEMORY attributes since those are
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* optional, not actually used by Zephyr and they will likely conflict with the
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* MPU configuration.
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*/
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#define LINKER_DT_REGIONS() \
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DT_FOREACH_STATUS_OKAY(_DT_COMPATIBLE, _REGION_DECLARE)
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