//go:build ppc64 || ppc64le

package cpu

const CacheLinePadSize = 128

func doinit() {
	options = []option{
		{Name: "darn", Feature: &PPC64.HasDARN},
		{Name: "scv", Feature: &PPC64.HasSCV},
		{Name: "power9", Feature: &PPC64.IsPOWER9},
	}

	osinit()
}

func isSet(hwc uint, value uint) bool {
	return hwc&value != 0
}

func Name() string {
	switch {

// Copyright 2020 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build arm64 && linux && !android

package cpu

func osInit() {
	hwcapInit("linux")

const (
	// ISA Level
	hwcap2_ARCH_2_07 = 0x80000000
	hwcap2_ARCH_3_00 = 0x00800000
	hwcap2_ARCH_3_1  = 0x00040000

	// CPU features
	hwcap2_DARN = 0x00200000
	hwcap2_SCV  = 0x00100000
)

func osinit() {
	PPC64.IsPOWER8 = isSet(HWCap2, hwcap2_ARCH_2_07)
	PPC64.IsPOWER9 = isSet(HWCap2, hwcap2_ARCH_3_00)
	PPC64.IsPOWER10 = isSet(HWCap2, hwcap2_ARCH_3_1)
	PPC64.HasDARN = isSet(HWCap2, hwcap2_DARN)

// Copyright 2020 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build arm64

package cpu

func osInit() {
	// Retrieve info from system register ID_AA64ISAR0_EL1.
	isar0 := getisar0()

	parseARM64SystemRegisters(isar0)

// Copyright 2020 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build arm64

package cpu

func osInit() {
	hwcapInit("android")

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build arm64 && !linux && !freebsd && !android && (!darwin || ios) && !openbsd

package cpu

func osInit() {
	// Other operating systems do not support reading HWCap from auxiliary vector,
	// reading privileged aarch64 system registers or sysctl in user space to detect
	// CPU features at runtime.

		{Name: "cpuid", Feature: &ARM64.HasCPUID},
		{Name: "isNeoverse", Feature: &ARM64.IsNeoverse},
	}

	// arm64 uses different ways to detect CPU features at runtime depending on the operating system.
	osInit()
}

func getisar0() uint64

func getMIDR() uint64

func extractBits(data uint64, start, end uint) uint {
	return (uint)(data>>start) & ((1 << (end - start + 1)) - 1)
}

	// From OpenBSD's sys/sysctl.h.
	_CTL_MACHDEP = 7

	// From OpenBSD's machine/cpu.h.
	_CPU_ID_AA64ISAR0 = 2
	_CPU_ID_AA64ISAR1 = 3
)

//go:noescape
func sysctlUint64(mib []uint32) (uint64, bool)

func osInit() {
	// Get ID_AA64ISAR0 from sysctl.
	isar0, ok := sysctlUint64([]uint32{_CTL_MACHDEP, _CPU_ID_AA64ISAR0})
	if !ok {
		return
	}
	parseARM64SystemRegisters(isar0)

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build (ppc64 || ppc64le) && !aix && !linux

package cpu

func osinit() {
	// Other operating systems do not support reading HWCap from auxiliary vector,
	// reading privileged system registers or sysctl in user space to detect CPU
	// features at runtime.

//go:build ppc64 || ppc64le

package cpu

const (
	// getsystemcfg constants
	_SC_IMPL      = 2
	_IMPL_POWER8  = 0x10000
	_IMPL_POWER9  = 0x20000
	_IMPL_POWER10 = 0x40000
)

func osinit() {
	impl := getsystemcfg(_SC_IMPL)
	PPC64.IsPOWER8 = isSet(impl, _IMPL_POWER8)
	PPC64.IsPOWER9 = isSet(impl, _IMPL_POWER9)
	PPC64.IsPOWER10 = isSet(impl, _IMPL_POWER10)
}