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Ensure proper use of DSB/ISB #4719

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cepetr opened this issue Mar 3, 2025 · 0 comments
Open

Ensure proper use of DSB/ISB #4719

cepetr opened this issue Mar 3, 2025 · 0 comments
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@cepetr
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cepetr commented Mar 3, 2025

According to the following ARM documentation: https://developer.arm.com/documentation/107565/0101/Memory-system/Memory-barriers/When-do-you-need-a-DSB-followed-by-an-ISB-,

we should use DSB/ISB instructions after enabling the FPU by writing to SCB->CPACR (in startup_init.c) and switching VTOR by setting SCB->VTOR (insys_utils.c).

It seems that this is not absolutely critical, but we should align with ARM’s recommendations.
@cepetr cepetr added the code Code improvements label Mar 3, 2025
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