linker: arm: Add cortex_m itcm section
Adds a linker section for Cortex-M instruction tightly coupled memory (ITCM), similar to the existing section for DTCM. A new executable MPU region is not added as there isn't currently a need to make this section accessible to user mode. This section can be enabled by setting a device tree chosen node zephyr,itcm. Signed-off-by: Maureen Helm <maureen.helm@nxp.com>
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6 changed files with 41 additions and 0 deletions
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@ -71,6 +71,11 @@
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#define CCM_ADDR DT_REG_ADDR(DT_CHOSEN(zephyr_ccm))
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#endif
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#if DT_NODE_HAS_STATUS(DT_CHOSEN(zephyr_itcm), okay)
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#define ITCM_SIZE DT_REG_SIZE(DT_CHOSEN(zephyr_itcm))
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#define ITCM_ADDR DT_REG_ADDR(DT_CHOSEN(zephyr_itcm))
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#endif
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#if DT_NODE_HAS_STATUS(DT_CHOSEN(zephyr_dtcm), okay)
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#define DTCM_SIZE DT_REG_SIZE(DT_CHOSEN(zephyr_dtcm))
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#define DTCM_ADDR DT_REG_ADDR(DT_CHOSEN(zephyr_dtcm))
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@ -108,6 +113,9 @@ MEMORY
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#if DT_NODE_HAS_STATUS(DT_CHOSEN(zephyr_ccm), okay)
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CCM (rw) : ORIGIN = CCM_ADDR, LENGTH = CCM_SIZE
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#endif
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#if DT_NODE_HAS_STATUS(DT_CHOSEN(zephyr_itcm), okay)
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ITCM (rw) : ORIGIN = ITCM_ADDR, LENGTH = ITCM_SIZE
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#endif
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#if DT_NODE_HAS_STATUS(DT_CHOSEN(zephyr_dtcm), okay)
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DTCM (rw) : ORIGIN = DTCM_ADDR, LENGTH = DTCM_SIZE
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#endif
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@ -419,6 +427,23 @@ SECTIONS
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GROUP_END(RAMABLE_REGION)
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#if DT_NODE_HAS_STATUS(DT_CHOSEN(zephyr_itcm), okay)
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GROUP_START(ITCM)
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SECTION_PROLOGUE(_ITCM_SECTION_NAME,,SUBALIGN(4))
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{
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__itcm_start = .;
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*(.itcm)
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*(".itcm.*")
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__itcm_end = .;
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} GROUP_LINK_IN(ITCM AT> ROMABLE_REGION)
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__itcm_size = __itcm_end - __itcm_start;
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__itcm_rom_start = LOADADDR(_ITCM_SECTION_NAME);
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GROUP_END(ITCM)
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#endif
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#if DT_NODE_HAS_STATUS(DT_CHOSEN(zephyr_dtcm), okay)
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GROUP_START(DTCM)
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