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

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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>
This commit is contained in:
Tobias Klauser
2020-10-24 13:24:49 +00:00
committed by Tobias Klauser
parent fb209a7c41
commit ef9fd89ba2
3 changed files with 189 additions and 17 deletions
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cpu/cpu_other_arm64.go
+2 -1
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@@ -2,7 +2,8 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build !linux,arm64
// +build !linux,!netbsd
// +build arm64
package cpu