1// Copyright 2017 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 ppc64 ppc64le 6 7package cpu 8 9// ppc64x doesn't have a 'cpuid' equivalent, so we rely on HWCAP/HWCAP2. 10// These are initialized by archauxv in runtime/os_linux_ppc64x.go. 11// These should not be changed after they are initialized. 12// On aix/ppc64, these values are initialized early in the runtime in runtime/os_aix.go. 13var HWCap uint 14var HWCap2 uint 15 16// HWCAP/HWCAP2 bits. These are exposed by the kernel. 17const ( 18 // ISA Level 19 PPC_FEATURE2_ARCH_2_07 = 0x80000000 20 PPC_FEATURE2_ARCH_3_00 = 0x00800000 21 22 // CPU features 23 PPC_FEATURE2_DARN = 0x00200000 24 PPC_FEATURE2_SCV = 0x00100000 25) 26 27func doinit() { 28 options = []option{ 29 {Name: "darn", Feature: &PPC64.HasDARN}, 30 {Name: "scv", Feature: &PPC64.HasSCV}, 31 {Name: "power9", Feature: &PPC64.IsPOWER9}, 32 {Name: "power8", Feature: &PPC64.IsPOWER8}, 33 } 34 35 // HWCAP2 feature bits 36 PPC64.IsPOWER8 = isSet(HWCap2, PPC_FEATURE2_ARCH_2_07) 37 PPC64.IsPOWER9 = isSet(HWCap2, PPC_FEATURE2_ARCH_3_00) 38 PPC64.HasDARN = isSet(HWCap2, PPC_FEATURE2_DARN) 39 PPC64.HasSCV = isSet(HWCap2, PPC_FEATURE2_SCV) 40} 41 42func isSet(hwc uint, value uint) bool { 43 return hwc&value != 0 44} 45