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amd64: add pmap_alloc_page_below_4g()

Description

amd64: add pmap_alloc_page_below_4g()

Suggested and reviewed by: markj
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D31121

Details

Provenance
kibAuthored on Jul 13 2021, 3:00 PM
Differential Revision
D31121: amd64 UEFI boot: stop copying staging area to 2M phys
Parents
rG34516d4ad19b: amd64 pti init: fix calculation of the kernel text start
Branches
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