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| 1 /* | |
| 2 * Copyright (c) 2012 The Native Client Authors. All rights reserved. | |
| 3 * Use of this source code is governed by a BSD-style license that can be | |
| 4 * found in the LICENSE file. | |
| 5 */ | |
| 6 | |
| 7 /* | |
| 8 * This module provides a simple abstraction for using the CPUID | |
| 9 * instruction to determine instruction set extensions supported by | |
| 10 * the current processor. | |
| 11 */ | |
| 12 #ifndef NATIVE_CLIENT_SRC_TRUSTED_VALIDATOR_X86_NACL_CPUID_H_ | |
| 13 #define NATIVE_CLIENT_SRC_TRUSTED_VALIDATOR_X86_NACL_CPUID_H_ | |
| 14 | |
| 15 #include "native_client/src/include/portability.h" | |
| 16 #include "native_client/src/trusted/validator/ncvalidate.h" | |
| 17 | |
| 18 | |
| 19 EXTERN_C_BEGIN | |
| 20 | |
| 21 /* The list of features we can get from the CPUID instruction. | |
| 22 * Do not modify this enum without making similar modifications to | |
| 23 * CPUFeatureDescriptions in nacl_cpuid.c. | |
| 24 */ | |
| 25 typedef enum { | |
| 26 NaClCPUFeatureX86_CPUIDSupported, | |
| 27 NaClCPUFeatureX86_CPUSupported, /* CPU is one we support. */ | |
| 28 NaClCPUFeatureX86_3DNOW, /* AMD-specific */ | |
| 29 NaClCPUFeatureX86_AES, | |
| 30 NaClCPUFeatureX86_AVX, | |
| 31 NaClCPUFeatureX86_BMI1, | |
| 32 NaClCPUFeatureX86_CLFLUSH, | |
| 33 NaClCPUFeatureX86_CLMUL, | |
| 34 NaClCPUFeatureX86_CMOV, | |
| 35 NaClCPUFeatureX86_CX16, | |
| 36 NaClCPUFeatureX86_CX8, | |
| 37 NaClCPUFeatureX86_E3DNOW, /* AMD-specific */ | |
| 38 NaClCPUFeatureX86_EMMX, /* AMD-specific */ | |
| 39 NaClCPUFeatureX86_F16C, | |
| 40 NaClCPUFeatureX86_FMA, | |
| 41 NaClCPUFeatureX86_FMA4, /* AMD-specific */ | |
| 42 NaClCPUFeatureX86_FXSR, | |
| 43 NaClCPUFeatureX86_LAHF, | |
| 44 NaClCPUFeatureX86_LM, | |
| 45 NaClCPUFeatureX86_LWP, /* AMD-specific */ | |
| 46 NaClCPUFeatureX86_LZCNT, /* AMD-specific */ | |
| 47 NaClCPUFeatureX86_MMX, | |
| 48 NaClCPUFeatureX86_MON, | |
| 49 NaClCPUFeatureX86_MOVBE, | |
| 50 NaClCPUFeatureX86_OSXSAVE, | |
| 51 NaClCPUFeatureX86_POPCNT, | |
| 52 NaClCPUFeatureX86_PRE, /* AMD-specific */ | |
| 53 NaClCPUFeatureX86_SSE, | |
| 54 NaClCPUFeatureX86_SSE2, | |
| 55 NaClCPUFeatureX86_SSE3, | |
| 56 NaClCPUFeatureX86_SSE41, | |
| 57 NaClCPUFeatureX86_SSE42, | |
| 58 NaClCPUFeatureX86_SSE4A, /* AMD-specific */ | |
| 59 NaClCPUFeatureX86_SSSE3, | |
| 60 NaClCPUFeatureX86_TBM, /* AMD-specific */ | |
| 61 NaClCPUFeatureX86_TSC, | |
| 62 NaClCPUFeatureX86_x87, | |
| 63 NaClCPUFeatureX86_XOP, /* AMD-specific */ | |
| 64 NaClCPUFeatureX86_Max | |
| 65 } NaClCPUFeatureX86ID; | |
| 66 | |
| 67 /* Features we can get about the x86 hardware. */ | |
| 68 typedef struct cpu_feature_struct_X86 { | |
| 69 char data[NaClCPUFeatureX86_Max]; | |
| 70 } NaClCPUFeaturesX86; | |
| 71 | |
| 72 /* Define the maximum length of a CPUID string. | |
| 73 * | |
| 74 * Note: If you change this length, fix the static initialization of wlid | |
| 75 * in nacl_cpuid.c to be initialized with an appropriate string. | |
| 76 */ | |
| 77 #define /* static const int */ kCPUIDStringLength 21 | |
| 78 | |
| 79 /* Defines the maximum number of feature registers used to hold CPUID. | |
| 80 * Note: This value corresponds to the number of enumerated elements in | |
| 81 * enum CPUFeatureReg defined in nacl_cpuid.c. | |
| 82 */ | |
| 83 #define kMaxCPUFeatureReg 12 | |
| 84 | |
| 85 /* Defines the maximum number of extended control registers. | |
| 86 */ | |
| 87 #define kMaxCPUXCRReg 1 | |
| 88 | |
| 89 /* Define a cache for collected CPU runtime information, from which | |
| 90 * queries can answer questions. | |
| 91 */ | |
| 92 typedef struct NaClCPUData { | |
| 93 /* The following is used to cache whether CPUID is defined for the | |
| 94 * architecture the code is running on. | |
| 95 */ | |
| 96 int _has_CPUID; | |
| 97 /* Version ID words used by CPUVersionID. */ | |
| 98 uint32_t _vidwords[4]; | |
| 99 /* Define the set of CPUID feature register values for the architecture. | |
| 100 * Note: We have two sets (of 4 registers) so that AMD specific flags can be | |
| 101 * picked up. | |
| 102 */ | |
| 103 uint32_t _featurev[kMaxCPUFeatureReg]; | |
| 104 /* Define the set of extended control register (XCR) values. | |
| 105 */ | |
| 106 uint64_t _xcrv[kMaxCPUXCRReg]; | |
| 107 /* Define a string to hold and cache the CPUID. In such cases, such races | |
| 108 * will at worst cause the CPUID to not be recognized. | |
| 109 */ | |
| 110 char _wlid[kCPUIDStringLength]; | |
| 111 } NaClCPUData; | |
| 112 | |
| 113 /* Collect CPU data about this CPU, and put into the given data structure. | |
| 114 */ | |
| 115 void NaClCPUDataGet(NaClCPUData* data); | |
| 116 | |
| 117 /* GetCPUIDString creates an ASCII string that identifies this CPU's | |
| 118 * vendor ID, family, model, and stepping, as per the CPUID instruction | |
| 119 */ | |
| 120 char *GetCPUIDString(NaClCPUData* data); | |
| 121 | |
| 122 /* | |
| 123 * Platform-independent NaClValidatorInterface functions. | |
| 124 */ | |
| 125 void NaClSetAllCPUFeaturesX86(NaClCPUFeatures *features); | |
| 126 void NaClGetCurrentCPUFeaturesX86(NaClCPUFeatures *cpu_features); | |
| 127 int NaClFixCPUFeaturesX86(NaClCPUFeatures *cpu_features); | |
| 128 | |
| 129 /* | |
| 130 * Platform-dependent getter/setter. | |
| 131 */ | |
| 132 static INLINE int NaClGetCPUFeatureX86(const NaClCPUFeaturesX86 *features, | |
| 133 NaClCPUFeatureX86ID id) { | |
| 134 return features->data[id]; | |
| 135 } | |
| 136 | |
| 137 void NaClSetCPUFeatureX86(NaClCPUFeaturesX86 *features, NaClCPUFeatureX86ID id, | |
| 138 int state); | |
| 139 const char *NaClGetCPUFeatureX86Name(NaClCPUFeatureX86ID id); | |
| 140 | |
| 141 /* | |
| 142 * Platform-independent functions which are only used in platform-dependent | |
| 143 * code. | |
| 144 * TODO(jfb) The ARM and MIPS CPU feature do not offer NaClCopyCPUFeaturesX86 | |
| 145 * and NaClArchSupportedX86, should they be removed? | |
| 146 */ | |
| 147 void NaClClearCPUFeaturesX86(NaClCPUFeaturesX86 *features); | |
| 148 void NaClCopyCPUFeaturesX86(NaClCPUFeaturesX86 *target, | |
| 149 const NaClCPUFeaturesX86 *source); | |
| 150 int NaClArchSupportedX86(const NaClCPUFeaturesX86 *features); | |
| 151 | |
| 152 EXTERN_C_END | |
| 153 | |
| 154 #endif /* NATIVE_CLIENT_SRC_TRUSTED_VALIDATOR_X86_NACL_CPUID_H_ */ | |
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Chromium Code Reviews
Issue 11864002:
Move CPU features into its own static library. (Closed)
Base URL: svn://svn.chromium.org/native_client/trunk/src/native_client