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Clear SP flash errors we should never see #1905

Merged
merged 2 commits into from
Oct 24, 2024
Merged

Clear SP flash errors we should never see #1905

merged 2 commits into from
Oct 24, 2024

Commits on Oct 24, 2024

  1. Clear SP flash errors we should never see 

    The STM32H7 is haunted/contains an errata where the CPU may
speculate into a system area (`0x1ff0_0000`) and trigger a flash
error normally only seen when security features are enabled.
This is not an official errata but seems to be well(?) reported

https://community.st.com/t5/stm32-mcus-products/spurious-rdperr-and-rdserr-when-all-protection-and-security/td-p/279852
zephyrproject-rtos/zephyr#60449

One suggested workaround is to add an extra MPU region which
marks The Danger Zone as NX. For the way hubris is designed this
isn't plausible. Instead clear any errors before we attempt to
write to flash.
    @labbott
    labbott committed Oct 24, 2024
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  2. Merge branch 'master' into clear_err

    @labbott
    labbott authored Oct 24, 2024
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