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
9const CacheLineSize = 128
10
11// ppc64x doesn't have a 'cpuid' equivalent, so we rely on HWCAP/HWCAP2.
12// These are linknamed in runtime/os_linux_ppc64x.go and are initialized by
13// archauxv().
14var hwcap uint
15var hwcap2 uint
16
17// HWCAP/HWCAP2 bits. These are exposed by the kernel.
18const (
19	// ISA Level
20	_PPC_FEATURE2_ARCH_2_07 = 0x80000000
21	_PPC_FEATURE2_ARCH_3_00 = 0x00800000
22
23	// CPU features
24	_PPC_FEATURE_HAS_ALTIVEC     = 0x10000000
25	_PPC_FEATURE_HAS_DFP         = 0x00000400
26	_PPC_FEATURE_HAS_VSX         = 0x00000080
27	_PPC_FEATURE2_HAS_HTM        = 0x40000000
28	_PPC_FEATURE2_HAS_ISEL       = 0x08000000
29	_PPC_FEATURE2_HAS_VEC_CRYPTO = 0x02000000
30	_PPC_FEATURE2_HTM_NOSC       = 0x01000000
31	_PPC_FEATURE2_DARN           = 0x00200000
32	_PPC_FEATURE2_SCV            = 0x00100000
33)
34
35func doinit() {
36	options = []option{
37		{"htm", &PPC64.HasHTM},
38		{"htmnosc", &PPC64.HasHTMNOSC},
39		{"darn", &PPC64.HasDARN},
40		{"scv", &PPC64.HasSCV},
41
42		// These capabilities should always be enabled on ppc64 and ppc64le:
43		//  {"vmx", &PPC64.HasVMX},
44		//  {"dfp", &PPC64.HasDFP},
45		//  {"vsx", &PPC64.HasVSX},
46		//  {"isel", &PPC64.HasISEL},
47		//  {"vcrypto", &PPC64.HasVCRYPTO},
48	}
49
50	// HWCAP feature bits
51	PPC64.HasVMX = isSet(hwcap, _PPC_FEATURE_HAS_ALTIVEC)
52	PPC64.HasDFP = isSet(hwcap, _PPC_FEATURE_HAS_DFP)
53	PPC64.HasVSX = isSet(hwcap, _PPC_FEATURE_HAS_VSX)
54
55	// HWCAP2 feature bits
56	PPC64.IsPOWER8 = isSet(hwcap2, _PPC_FEATURE2_ARCH_2_07)
57	PPC64.HasHTM = isSet(hwcap2, _PPC_FEATURE2_HAS_HTM)
58	PPC64.HasISEL = isSet(hwcap2, _PPC_FEATURE2_HAS_ISEL)
59	PPC64.HasVCRYPTO = isSet(hwcap2, _PPC_FEATURE2_HAS_VEC_CRYPTO)
60	PPC64.HasHTMNOSC = isSet(hwcap2, _PPC_FEATURE2_HTM_NOSC)
61	PPC64.IsPOWER9 = isSet(hwcap2, _PPC_FEATURE2_ARCH_3_00)
62	PPC64.HasDARN = isSet(hwcap2, _PPC_FEATURE2_DARN)
63	PPC64.HasSCV = isSet(hwcap2, _PPC_FEATURE2_SCV)
64}
65
66func isSet(hwc uint, value uint) bool {
67	return hwc&value != 0
68}
69