Clearing Cache

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Fianawarrior
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Posted by Fianawarrior: Sat. Dec 4, 2021 - 06:19 PM
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Guys, when should you clear cache on a MPU?

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Tools, Compilers, Assemblers, Linkers and General Programming (ARM-related)
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westfw
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Posted by westfw: Sun. Dec 5, 2021 - 02:31 AM
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When the memory "behind" the cache may have been changed by something other than the devices "in front" of the cache.

One example is when a DMA peripheral has modified memory.  Another is if you switch tasks that use different MMU settings (and the cache is based on per-task addresses.)

 

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