github.com/Andyfoo/golang/x/sys@v0.0.0-20190901054642-57c1bf301704/cpu/cpu_linux_ppc64x.go (about)

     1  // Copyright 2018 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  // +build linux
     6  // +build ppc64 ppc64le
     7  
     8  package cpu
     9  
    10  const cacheLineSize = 128
    11  
    12  // HWCAP/HWCAP2 bits. These are exposed by the kernel.
    13  const (
    14  	// ISA Level
    15  	_PPC_FEATURE2_ARCH_2_07 = 0x80000000
    16  	_PPC_FEATURE2_ARCH_3_00 = 0x00800000
    17  
    18  	// CPU features
    19  	_PPC_FEATURE2_DARN = 0x00200000
    20  	_PPC_FEATURE2_SCV  = 0x00100000
    21  )
    22  
    23  func doinit() {
    24  	// HWCAP2 feature bits
    25  	PPC64.IsPOWER8 = isSet(hwCap2, _PPC_FEATURE2_ARCH_2_07)
    26  	PPC64.IsPOWER9 = isSet(hwCap2, _PPC_FEATURE2_ARCH_3_00)
    27  	PPC64.HasDARN = isSet(hwCap2, _PPC_FEATURE2_DARN)
    28  	PPC64.HasSCV = isSet(hwCap2, _PPC_FEATURE2_SCV)
    29  }
    30  
    31  func isSet(hwc uint, value uint) bool {
    32  	return hwc&value != 0
    33  }