tree 00d4e9419854b8eb481bb29d73b034e62c0a9ad2
parent fb209a7c41cd8505b3b047ae14763a4d3d06fa19
author Tobias Klauser <tklauser@distanz.ch> 1603461417 +0200
committer Tobias Klauser <tobias.klauser@gmail.com> 1603545889 +0000

cpu: read ARM64 registers using sysctl(3) on netbsd/arm64

Use sysctl("machdep.cpu0.cpu_id") to retrieve the ARM64 cpu_id
information on netbsd/arm64. This includes the ISAR0, ISAR1 and PFR0
registers which can be parsed using existing functionality.

In order to use sysctl(3) without depending on x/sys/unix, some
functionality needed to be copied and slightly adjusted.

Change-Id: Ic9a133917ae5da516e6794f375bd7602d9bd3aa6
Reviewed-on: https://go-review.googlesource.com/c/sys/+/264378
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Trust: Benny Siegert <bsiegert@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Benny Siegert <bsiegert@gmail.com>