1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ART_RUNTIME_ARCH_MIPS64_INSTRUCTION_SET_FEATURES_MIPS64_H_ 18 #define ART_RUNTIME_ARCH_MIPS64_INSTRUCTION_SET_FEATURES_MIPS64_H_ 19 20 #include "arch/instruction_set_features.h" 21 22 namespace art { 23 24 // Instruction set features relevant to the MIPS64 architecture. 25 class Mips64InstructionSetFeatures FINAL : public InstructionSetFeatures { 26 public: 27 // Process a CPU variant string like "r4000" and create InstructionSetFeatures. 28 static const Mips64InstructionSetFeatures* FromVariant(const std::string& variant, 29 std::string* error_msg); 30 31 // Parse a bitmap and create an InstructionSetFeatures. 32 static const Mips64InstructionSetFeatures* FromBitmap(uint32_t bitmap); 33 34 // Turn C pre-processor #defines into the equivalent instruction set features. 35 static const Mips64InstructionSetFeatures* FromCppDefines(); 36 37 // Process /proc/cpuinfo and use kRuntimeISA to produce InstructionSetFeatures. 38 static const Mips64InstructionSetFeatures* FromCpuInfo(); 39 40 // Process the auxiliary vector AT_HWCAP entry and use kRuntimeISA to produce 41 // InstructionSetFeatures. 42 static const Mips64InstructionSetFeatures* FromHwcap(); 43 44 // Use assembly tests of the current runtime (ie kRuntimeISA) to determine the 45 // InstructionSetFeatures. This works around kernel bugs in AT_HWCAP and /proc/cpuinfo. 46 static const Mips64InstructionSetFeatures* FromAssembly(); 47 48 bool Equals(const InstructionSetFeatures* other) const OVERRIDE; 49 GetInstructionSet()50 InstructionSet GetInstructionSet() const OVERRIDE { 51 return kMips64; 52 } 53 54 uint32_t AsBitmap() const OVERRIDE; 55 56 std::string GetFeatureString() const OVERRIDE; 57 ~Mips64InstructionSetFeatures()58 virtual ~Mips64InstructionSetFeatures() {} 59 60 protected: 61 // Parse a vector of the form "fpu32", "mips2" adding these to a new Mips64InstructionSetFeatures. 62 virtual const InstructionSetFeatures* 63 AddFeaturesFromSplitString(const bool smp, const std::vector<std::string>& features, 64 std::string* error_msg) const OVERRIDE; 65 66 private: Mips64InstructionSetFeatures(bool smp)67 explicit Mips64InstructionSetFeatures(bool smp) : InstructionSetFeatures(smp) { 68 } 69 70 // Bitmap positions for encoding features as a bitmap. 71 enum { 72 kSmpBitfield = 1, 73 }; 74 75 DISALLOW_COPY_AND_ASSIGN(Mips64InstructionSetFeatures); 76 }; 77 78 } // namespace art 79 80 #endif // ART_RUNTIME_ARCH_MIPS64_INSTRUCTION_SET_FEATURES_MIPS64_H_ 81