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 ppc64x_hwcap uint
15var ppc64x_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 init() {
36	// HWCAP feature bits
37	PPC64.HasVMX = isSet(ppc64x_hwcap, _PPC_FEATURE_HAS_ALTIVEC)
38	PPC64.HasDFP = isSet(ppc64x_hwcap, _PPC_FEATURE_HAS_DFP)
39	PPC64.HasVSX = isSet(ppc64x_hwcap, _PPC_FEATURE_HAS_VSX)
40
41	// HWCAP2 feature bits
42	PPC64.IsPOWER8 = isSet(ppc64x_hwcap2, _PPC_FEATURE2_ARCH_2_07)
43	PPC64.HasHTM = isSet(ppc64x_hwcap2, _PPC_FEATURE2_HAS_HTM)
44	PPC64.HasISEL = isSet(ppc64x_hwcap2, _PPC_FEATURE2_HAS_ISEL)
45	PPC64.HasVCRYPTO = isSet(ppc64x_hwcap2, _PPC_FEATURE2_HAS_VEC_CRYPTO)
46	PPC64.HasHTMNOSC = isSet(ppc64x_hwcap2, _PPC_FEATURE2_HTM_NOSC)
47	PPC64.IsPOWER9 = isSet(ppc64x_hwcap2, _PPC_FEATURE2_ARCH_3_00)
48	PPC64.HasDARN = isSet(ppc64x_hwcap2, _PPC_FEATURE2_DARN)
49	PPC64.HasSCV = isSet(ppc64x_hwcap2, _PPC_FEATURE2_SCV)
50}
51
52func isSet(hwc uint, value uint) bool {
53	return hwc&value != 0
54}
55