github.com/primecitizens/pcz/std@v0.2.1/core/cpu/cpu_ppc64x_linux.go (about)

     1  // SPDX-License-Identifier: Apache-2.0
     2  // Copyright 2023 The Prime Citizens
     3  //
     4  // Copyright 2020 The Go Authors. All rights reserved.
     5  // Use of this source code is governed by a BSD-style
     6  // license that can be found in the LICENSE file.
     7  
     8  //go:build (ppc64 || ppc64le) && linux
     9  
    10  package cpu
    11  
    12  // ppc64 doesn't have a 'cpuid' equivalent, so we rely on HWCAP/HWCAP2.
    13  // These are initialized by archauxv and should not be changed after they are
    14  // initialized.
    15  var (
    16  	HWCap  uint
    17  	HWCap2 uint
    18  )
    19  
    20  // HWCAP bits. These are exposed by Linux.
    21  const (
    22  	// ISA Level
    23  	hwcap2_ARCH_2_07 = 0x80000000
    24  	hwcap2_ARCH_3_00 = 0x00800000
    25  	hwcap2_ARCH_3_1  = 0x00040000
    26  
    27  	// CPU features
    28  	hwcap2_DARN = 0x00200000
    29  	hwcap2_SCV  = 0x00100000
    30  )
    31  
    32  func osinit() {
    33  	PPC64.IsPOWER8 = isSet(HWCap2, hwcap2_ARCH_2_07)
    34  	PPC64.IsPOWER9 = isSet(HWCap2, hwcap2_ARCH_3_00)
    35  	PPC64.IsPOWER10 = isSet(HWCap2, hwcap2_ARCH_3_1)
    36  	PPC64.HasDARN = isSet(HWCap2, hwcap2_DARN)
    37  	PPC64.HasSCV = isSet(HWCap2, hwcap2_SCV)
    38  }