linker: arm: Fix and enhance Cortex-M TCM support #31132
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MaureenHelm
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dleach02,
erwango,
ioannisg and
mmahadevan108
MaureenHelm
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andyross,
galak and
nashif
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erwango
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ioannisg
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Jan 7, 2021
Adds missing DTCM_ADDR and CCM_ADDR macros needed by the linker script generated by scripts/gen_relocate_app.py. Moves associated bss_end, noinit_end, and data_end linker symbols to account for section relocation. Without this change, the section sizes calculated in z_bss_zero() and z_data_copy() are incorrect. Signed-off-by: Maureen Helm <[email protected]>
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 <[email protected]>
Sets the device tree chosen node for instruction tightly coupled memory (ITCM) on all i.MX RT boards. Leverages the common Cortex-M linker section instead of the SoC-specific one. Signed-off-by: Maureen Helm <[email protected]>
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platform: STM32
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@ioannisg will you please have another look? |
ioannisg
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Jan 14, 2021
erwango
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Jan 15, 2021
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Fixes the Cortex-M DTCM linker section to work with relocation using scripts/gen_relocate_app.py
Adds support for the Cortex-M ITCM linker section.
This is in preparation for extending #31034 to support XIP.