| // Copyright 2017 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| // +build ppc64 ppc64le |
| |
| package cpu |
| |
| const CacheLineSize = 128 |
| |
| // ppc64x doesn't have a 'cpuid' equivalent, so we rely on HWCAP/HWCAP2. |
| // These are linknamed in runtime/os_linux_ppc64x.go and are initialized by |
| // archauxv(). |
| var ppc64x_hwcap uint |
| var ppc64x_hwcap2 uint |
| |
| // HWCAP/HWCAP2 bits. These are exposed by the kernel. |
| const ( |
| // ISA Level |
| _PPC_FEATURE2_ARCH_2_07 = 0x80000000 |
| _PPC_FEATURE2_ARCH_3_00 = 0x00800000 |
| |
| // CPU features |
| _PPC_FEATURE_HAS_ALTIVEC = 0x10000000 |
| _PPC_FEATURE_HAS_DFP = 0x00000400 |
| _PPC_FEATURE_HAS_VSX = 0x00000080 |
| _PPC_FEATURE2_HAS_HTM = 0x40000000 |
| _PPC_FEATURE2_HAS_ISEL = 0x08000000 |
| _PPC_FEATURE2_HAS_VEC_CRYPTO = 0x02000000 |
| _PPC_FEATURE2_HTM_NOSC = 0x01000000 |
| _PPC_FEATURE2_DARN = 0x00200000 |
| _PPC_FEATURE2_SCV = 0x00100000 |
| ) |
| |
| func init() { |
| // HWCAP feature bits |
| PPC64.HasVMX = isSet(ppc64x_hwcap, _PPC_FEATURE_HAS_ALTIVEC) |
| PPC64.HasDFP = isSet(ppc64x_hwcap, _PPC_FEATURE_HAS_DFP) |
| PPC64.HasVSX = isSet(ppc64x_hwcap, _PPC_FEATURE_HAS_VSX) |
| |
| // HWCAP2 feature bits |
| PPC64.IsPOWER8 = isSet(ppc64x_hwcap2, _PPC_FEATURE2_ARCH_2_07) |
| PPC64.HasHTM = isSet(ppc64x_hwcap2, _PPC_FEATURE2_HAS_HTM) |
| PPC64.HasISEL = isSet(ppc64x_hwcap2, _PPC_FEATURE2_HAS_ISEL) |
| PPC64.HasVCRYPTO = isSet(ppc64x_hwcap2, _PPC_FEATURE2_HAS_VEC_CRYPTO) |
| PPC64.HasHTMNOSC = isSet(ppc64x_hwcap2, _PPC_FEATURE2_HTM_NOSC) |
| PPC64.IsPOWER9 = isSet(ppc64x_hwcap2, _PPC_FEATURE2_ARCH_3_00) |
| PPC64.HasDARN = isSet(ppc64x_hwcap2, _PPC_FEATURE2_DARN) |
| PPC64.HasSCV = isSet(ppc64x_hwcap2, _PPC_FEATURE2_SCV) |
| } |
| |
| func isSet(hwc uint, value uint) bool { |
| return hwc&value != 0 |
| } |