arch/pmp: Pull some changes from upstream #176
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PMPCFG_A_TOR region may have zero size. The pmp configuration currently fails for zero-sized TOR. This patch bypasses such a restriction. Also replace log2ceil with LOG2_CEIL from lib/math32.h. Signed-off-by: Eero Nurkkala <[email protected]>
These options are just wrong and a result of misunderstanding of the Polarfire SoC spec. There are no feature limitations in the CPU PMP implementation -> remove any configuration options added.
For TOR: Any size and 4-byte aligned address is required
For NA4: Only size 4 and 4-byte aligned address is good
For NAPOT: Minimum size is 8 bytes, minimum base alignment is 8 bytes,
and size must be power-of-two aligned with base
This commit simplifies these checks and removes all the nonsense added
by a misunderstanding of how the MPFS / Polarfire SoC's PMP works.
jlaitine
approved these changes
Oct 24, 2023
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