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Handle pmap_enter() on already promoted mappings for ARMv6/v7

Description

Handle pmap_enter() on already promoted mappings for ARMv6/v7

Attempt to demote the superpage if trying to pmap_enter() on
one. Panic only when the particular superpage should
no longer exist for that pmap and address.

Details

Provenance
zbbAuthored on
Parents
rS261921: Remove spurious assertion from pmap_extract_locked() on ARM
Branches
Unknown
Tags
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