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Only store the arm64 ID registers in the cpu_desc

Description

Only store the arm64 ID registers in the cpu_desc

There is no need to store a pointer to the CPU implementer and part
strings. Switch to load them directly into the sbuf used to print them
on boot.

While here print the machine ID register when we fail to determine the
implementer or part we are booting on.

Reviewed by: markj, kib
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D31346

Details

Provenance
andrewAuthored on Jul 29 2021, 8:55 AM
Reviewer
markj
Differential Revision
D31346: Only store the arm64 ID registers in the cpu_desc
Parents
R10:1a78f44cd205: Move setting arm64 HWCAP values to the ID tables
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