cpuid.cc revision 11793
15659Sgblack@eecs.umich.edu/* 25659Sgblack@eecs.umich.edu * Copyright (c) 2008 The Regents of The University of Michigan 35659Sgblack@eecs.umich.edu * All rights reserved. 45659Sgblack@eecs.umich.edu * 55659Sgblack@eecs.umich.edu * Redistribution and use in source and binary forms, with or without 65659Sgblack@eecs.umich.edu * modification, are permitted provided that the following conditions are 75659Sgblack@eecs.umich.edu * met: redistributions of source code must retain the above copyright 85659Sgblack@eecs.umich.edu * notice, this list of conditions and the following disclaimer; 95659Sgblack@eecs.umich.edu * redistributions in binary form must reproduce the above copyright 105659Sgblack@eecs.umich.edu * notice, this list of conditions and the following disclaimer in the 115659Sgblack@eecs.umich.edu * documentation and/or other materials provided with the distribution; 125659Sgblack@eecs.umich.edu * neither the name of the copyright holders nor the names of its 135659Sgblack@eecs.umich.edu * contributors may be used to endorse or promote products derived from 145659Sgblack@eecs.umich.edu * this software without specific prior written permission. 155659Sgblack@eecs.umich.edu * 165659Sgblack@eecs.umich.edu * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 175659Sgblack@eecs.umich.edu * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 185659Sgblack@eecs.umich.edu * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 195659Sgblack@eecs.umich.edu * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 205659Sgblack@eecs.umich.edu * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 215659Sgblack@eecs.umich.edu * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 225659Sgblack@eecs.umich.edu * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 235659Sgblack@eecs.umich.edu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 245659Sgblack@eecs.umich.edu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 255659Sgblack@eecs.umich.edu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 265659Sgblack@eecs.umich.edu * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 275659Sgblack@eecs.umich.edu * 285659Sgblack@eecs.umich.edu * Authors: Gabe Black 295659Sgblack@eecs.umich.edu */ 305659Sgblack@eecs.umich.edu 315659Sgblack@eecs.umich.edu#include "arch/x86/cpuid.hh" 3211793Sbrandon.potter@amd.com 335659Sgblack@eecs.umich.edu#include "base/bitfield.hh" 345659Sgblack@eecs.umich.edu#include "cpu/thread_context.hh" 355659Sgblack@eecs.umich.edu 365659Sgblack@eecs.umich.edunamespace X86ISA { 375659Sgblack@eecs.umich.edu enum StandardCpuidFunction { 385659Sgblack@eecs.umich.edu VendorAndLargestStdFunc, 395659Sgblack@eecs.umich.edu FamilyModelStepping, 405659Sgblack@eecs.umich.edu NumStandardCpuidFuncs 415659Sgblack@eecs.umich.edu }; 425659Sgblack@eecs.umich.edu 435659Sgblack@eecs.umich.edu enum ExtendedCpuidFunctions { 445659Sgblack@eecs.umich.edu VendorAndLargestExtFunc, 455659Sgblack@eecs.umich.edu FamilyModelSteppingBrandFeatures, 465659Sgblack@eecs.umich.edu NameString1, 475659Sgblack@eecs.umich.edu NameString2, 485659Sgblack@eecs.umich.edu NameString3, 495659Sgblack@eecs.umich.edu L1CacheAndTLB, 505659Sgblack@eecs.umich.edu L2L3CacheAndL2TLB, 515659Sgblack@eecs.umich.edu APMInfo, 5210439Smajiuyue@ncic.ac.cn LongModeAddressSize, 5311320Ssteve.reinhardt@amd.com 545659Sgblack@eecs.umich.edu /* 555659Sgblack@eecs.umich.edu * The following are defined by the spec but not yet implemented 565659Sgblack@eecs.umich.edu */ 5710439Smajiuyue@ncic.ac.cn/* // Function 9 is reserved 585659Sgblack@eecs.umich.edu SVMInfo = 10, 595659Sgblack@eecs.umich.edu // Functions 11-24 are reserved 605659Sgblack@eecs.umich.edu TLB1GBPageInfo = 25, 615659Sgblack@eecs.umich.edu PerformanceInfo,*/ 625659Sgblack@eecs.umich.edu 635659Sgblack@eecs.umich.edu NumExtendedCpuidFuncs 645659Sgblack@eecs.umich.edu }; 655659Sgblack@eecs.umich.edu 665659Sgblack@eecs.umich.edu static const int vendorStringSize = 13; 676040Sgblack@eecs.umich.edu static const char vendorString[vendorStringSize] = "M5 Simulator"; 685659Sgblack@eecs.umich.edu static const int nameStringSize = 48; 695659Sgblack@eecs.umich.edu static const char nameString[nameStringSize] = "Fake M5 x86_64 CPU"; 705659Sgblack@eecs.umich.edu 715659Sgblack@eecs.umich.edu uint64_t 725659Sgblack@eecs.umich.edu stringToRegister(const char *str) 735659Sgblack@eecs.umich.edu { 745659Sgblack@eecs.umich.edu uint64_t reg = 0; 755659Sgblack@eecs.umich.edu for (int pos = 3; pos >=0; pos--) { 765659Sgblack@eecs.umich.edu reg <<= 8; 775659Sgblack@eecs.umich.edu reg |= str[pos]; 785659Sgblack@eecs.umich.edu } 795659Sgblack@eecs.umich.edu return reg; 805659Sgblack@eecs.umich.edu } 815659Sgblack@eecs.umich.edu 825659Sgblack@eecs.umich.edu bool 837072Sgblack@eecs.umich.edu doCpuid(ThreadContext * tc, uint32_t function, 847072Sgblack@eecs.umich.edu uint32_t index, CpuidResult &result) 855659Sgblack@eecs.umich.edu { 865659Sgblack@eecs.umich.edu uint16_t family = bits(function, 31, 16); 875659Sgblack@eecs.umich.edu uint16_t funcNum = bits(function, 15, 0); 885659Sgblack@eecs.umich.edu if (family == 0x8000) { 895659Sgblack@eecs.umich.edu // The extended functions 905659Sgblack@eecs.umich.edu switch (funcNum) { 915659Sgblack@eecs.umich.edu case VendorAndLargestExtFunc: 925659Sgblack@eecs.umich.edu assert(vendorStringSize >= 12); 935659Sgblack@eecs.umich.edu result = CpuidResult( 946052Sgblack@eecs.umich.edu 0x80000000 + NumExtendedCpuidFuncs - 1, 955659Sgblack@eecs.umich.edu stringToRegister(vendorString), 965659Sgblack@eecs.umich.edu stringToRegister(vendorString + 4), 975659Sgblack@eecs.umich.edu stringToRegister(vendorString + 8)); 985659Sgblack@eecs.umich.edu break; 995659Sgblack@eecs.umich.edu case FamilyModelSteppingBrandFeatures: 1005659Sgblack@eecs.umich.edu result = CpuidResult(0x00020f51, 0x00000405, 10110637Sgabeblack@google.com 0xe3d3fbff, 0x00000001); 1025659Sgblack@eecs.umich.edu break; 1035659Sgblack@eecs.umich.edu case NameString1: 1045659Sgblack@eecs.umich.edu case NameString2: 1055659Sgblack@eecs.umich.edu case NameString3: 1065659Sgblack@eecs.umich.edu { 1075659Sgblack@eecs.umich.edu // Zero fill anything beyond the end of the string. This 1085659Sgblack@eecs.umich.edu // should go away once the string is a vetted parameter. 1095659Sgblack@eecs.umich.edu char cleanName[nameStringSize]; 1105659Sgblack@eecs.umich.edu memset(cleanName, '\0', nameStringSize); 1115659Sgblack@eecs.umich.edu strncpy(cleanName, nameString, nameStringSize); 1125659Sgblack@eecs.umich.edu 1135659Sgblack@eecs.umich.edu int offset = (funcNum - NameString1) * 16; 1145659Sgblack@eecs.umich.edu assert(nameStringSize >= offset + 16); 1155659Sgblack@eecs.umich.edu result = CpuidResult( 1165659Sgblack@eecs.umich.edu stringToRegister(cleanName + offset + 0), 1175659Sgblack@eecs.umich.edu stringToRegister(cleanName + offset + 4), 1186068Sgblack@eecs.umich.edu stringToRegister(cleanName + offset + 12), 1196068Sgblack@eecs.umich.edu stringToRegister(cleanName + offset + 8)); 1205659Sgblack@eecs.umich.edu } 1215659Sgblack@eecs.umich.edu break; 1225659Sgblack@eecs.umich.edu case L1CacheAndTLB: 1235659Sgblack@eecs.umich.edu result = CpuidResult(0xff08ff08, 0xff20ff20, 1245659Sgblack@eecs.umich.edu 0x40020140, 0x40020140); 1255659Sgblack@eecs.umich.edu break; 1265659Sgblack@eecs.umich.edu case L2L3CacheAndL2TLB: 1275659Sgblack@eecs.umich.edu result = CpuidResult(0x00000000, 0x42004200, 1285659Sgblack@eecs.umich.edu 0x00000000, 0x04008140); 1295659Sgblack@eecs.umich.edu break; 1305659Sgblack@eecs.umich.edu case APMInfo: 1315659Sgblack@eecs.umich.edu result = CpuidResult(0x80000018, 0x68747541, 1325659Sgblack@eecs.umich.edu 0x69746e65, 0x444d4163); 1335659Sgblack@eecs.umich.edu break; 13410439Smajiuyue@ncic.ac.cn case LongModeAddressSize: 13510539Sgabeblack@google.com result = CpuidResult(0x00003030, 0x00000000, 13610439Smajiuyue@ncic.ac.cn 0x00000000, 0x00000000); 13710439Smajiuyue@ncic.ac.cn break; 13810439Smajiuyue@ncic.ac.cn/* case SVMInfo: 1395659Sgblack@eecs.umich.edu case TLB1GBPageInfo: 1405659Sgblack@eecs.umich.edu case PerformanceInfo:*/ 1415659Sgblack@eecs.umich.edu default: 14211217Sbaz21@cam.ac.uk warn("x86 cpuid family 0x8000: unimplemented function %u", 14311217Sbaz21@cam.ac.uk funcNum); 1445659Sgblack@eecs.umich.edu return false; 1455659Sgblack@eecs.umich.edu } 14611321Ssteve.reinhardt@amd.com } else if (family == 0x0000) { 1475659Sgblack@eecs.umich.edu // The standard functions 1485659Sgblack@eecs.umich.edu switch (funcNum) { 1495659Sgblack@eecs.umich.edu case VendorAndLargestStdFunc: 1505659Sgblack@eecs.umich.edu assert(vendorStringSize >= 12); 1515659Sgblack@eecs.umich.edu result = CpuidResult( 1525659Sgblack@eecs.umich.edu NumStandardCpuidFuncs - 1, 1535659Sgblack@eecs.umich.edu stringToRegister(vendorString), 1545659Sgblack@eecs.umich.edu stringToRegister(vendorString + 4), 1555659Sgblack@eecs.umich.edu stringToRegister(vendorString + 8)); 1565659Sgblack@eecs.umich.edu break; 1575659Sgblack@eecs.umich.edu case FamilyModelStepping: 1589473Snilay@cs.wisc.edu result = CpuidResult(0x00020f51, 0x00000805, 15910638Sgabeblack@google.com 0xe7dbfbff, 0x04000209); 1605659Sgblack@eecs.umich.edu break; 1615659Sgblack@eecs.umich.edu default: 16211217Sbaz21@cam.ac.uk warn("x86 cpuid family 0x0000: unimplemented function %u", 16311217Sbaz21@cam.ac.uk funcNum); 1645659Sgblack@eecs.umich.edu return false; 1655659Sgblack@eecs.umich.edu } 1669124Snilay@cs.wisc.edu } else { 1679124Snilay@cs.wisc.edu warn("x86 cpuid: unknown family %#x", family); 1689124Snilay@cs.wisc.edu return false; 1695659Sgblack@eecs.umich.edu } 1709124Snilay@cs.wisc.edu 1715659Sgblack@eecs.umich.edu return true; 1725659Sgblack@eecs.umich.edu } 1737811Ssteve.reinhardt@amd.com} // namespace X86ISA 174