cpuid.cc revision 9473
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" 325659Sgblack@eecs.umich.edu#include "base/bitfield.hh" 335659Sgblack@eecs.umich.edu#include "cpu/thread_context.hh" 345659Sgblack@eecs.umich.edu 355659Sgblack@eecs.umich.edunamespace X86ISA { 365659Sgblack@eecs.umich.edu enum StandardCpuidFunction { 375659Sgblack@eecs.umich.edu VendorAndLargestStdFunc, 385659Sgblack@eecs.umich.edu FamilyModelStepping, 395659Sgblack@eecs.umich.edu NumStandardCpuidFuncs 405659Sgblack@eecs.umich.edu }; 415659Sgblack@eecs.umich.edu 425659Sgblack@eecs.umich.edu enum ExtendedCpuidFunctions { 435659Sgblack@eecs.umich.edu VendorAndLargestExtFunc, 445659Sgblack@eecs.umich.edu FamilyModelSteppingBrandFeatures, 455659Sgblack@eecs.umich.edu NameString1, 465659Sgblack@eecs.umich.edu NameString2, 475659Sgblack@eecs.umich.edu NameString3, 485659Sgblack@eecs.umich.edu L1CacheAndTLB, 495659Sgblack@eecs.umich.edu L2L3CacheAndL2TLB, 505659Sgblack@eecs.umich.edu APMInfo, 515659Sgblack@eecs.umich.edu 525659Sgblack@eecs.umich.edu /* 535659Sgblack@eecs.umich.edu * The following are defined by the spec but not yet implemented 545659Sgblack@eecs.umich.edu */ 555659Sgblack@eecs.umich.edu/* LongModeAddressSize, 565659Sgblack@eecs.umich.edu // Function 9 is reserved 575659Sgblack@eecs.umich.edu SVMInfo = 10, 585659Sgblack@eecs.umich.edu // Functions 11-24 are reserved 595659Sgblack@eecs.umich.edu TLB1GBPageInfo = 25, 605659Sgblack@eecs.umich.edu PerformanceInfo,*/ 615659Sgblack@eecs.umich.edu 625659Sgblack@eecs.umich.edu NumExtendedCpuidFuncs 635659Sgblack@eecs.umich.edu }; 645659Sgblack@eecs.umich.edu 655659Sgblack@eecs.umich.edu static const int vendorStringSize = 13; 666040Sgblack@eecs.umich.edu static const char vendorString[vendorStringSize] = "M5 Simulator"; 675659Sgblack@eecs.umich.edu static const int nameStringSize = 48; 685659Sgblack@eecs.umich.edu static const char nameString[nameStringSize] = "Fake M5 x86_64 CPU"; 695659Sgblack@eecs.umich.edu 705659Sgblack@eecs.umich.edu uint64_t 715659Sgblack@eecs.umich.edu stringToRegister(const char *str) 725659Sgblack@eecs.umich.edu { 735659Sgblack@eecs.umich.edu uint64_t reg = 0; 745659Sgblack@eecs.umich.edu for (int pos = 3; pos >=0; pos--) { 755659Sgblack@eecs.umich.edu reg <<= 8; 765659Sgblack@eecs.umich.edu reg |= str[pos]; 775659Sgblack@eecs.umich.edu } 785659Sgblack@eecs.umich.edu return reg; 795659Sgblack@eecs.umich.edu } 805659Sgblack@eecs.umich.edu 815659Sgblack@eecs.umich.edu bool 827072Sgblack@eecs.umich.edu doCpuid(ThreadContext * tc, uint32_t function, 837072Sgblack@eecs.umich.edu uint32_t index, CpuidResult &result) 845659Sgblack@eecs.umich.edu { 855659Sgblack@eecs.umich.edu uint16_t family = bits(function, 31, 16); 865659Sgblack@eecs.umich.edu uint16_t funcNum = bits(function, 15, 0); 875659Sgblack@eecs.umich.edu if (family == 0x8000) { 885659Sgblack@eecs.umich.edu // The extended functions 895659Sgblack@eecs.umich.edu switch (funcNum) { 905659Sgblack@eecs.umich.edu case VendorAndLargestExtFunc: 915659Sgblack@eecs.umich.edu assert(vendorStringSize >= 12); 925659Sgblack@eecs.umich.edu result = CpuidResult( 936052Sgblack@eecs.umich.edu 0x80000000 + NumExtendedCpuidFuncs - 1, 945659Sgblack@eecs.umich.edu stringToRegister(vendorString), 955659Sgblack@eecs.umich.edu stringToRegister(vendorString + 4), 965659Sgblack@eecs.umich.edu stringToRegister(vendorString + 8)); 975659Sgblack@eecs.umich.edu break; 985659Sgblack@eecs.umich.edu case FamilyModelSteppingBrandFeatures: 995659Sgblack@eecs.umich.edu result = CpuidResult(0x00020f51, 0x00000405, 1005659Sgblack@eecs.umich.edu 0xe3d3fbff, 0x00000001); 1015659Sgblack@eecs.umich.edu break; 1025659Sgblack@eecs.umich.edu case NameString1: 1035659Sgblack@eecs.umich.edu case NameString2: 1045659Sgblack@eecs.umich.edu case NameString3: 1055659Sgblack@eecs.umich.edu { 1065659Sgblack@eecs.umich.edu // Zero fill anything beyond the end of the string. This 1075659Sgblack@eecs.umich.edu // should go away once the string is a vetted parameter. 1085659Sgblack@eecs.umich.edu char cleanName[nameStringSize]; 1095659Sgblack@eecs.umich.edu memset(cleanName, '\0', nameStringSize); 1105659Sgblack@eecs.umich.edu strncpy(cleanName, nameString, nameStringSize); 1115659Sgblack@eecs.umich.edu 1125659Sgblack@eecs.umich.edu int offset = (funcNum - NameString1) * 16; 1135659Sgblack@eecs.umich.edu assert(nameStringSize >= offset + 16); 1145659Sgblack@eecs.umich.edu result = CpuidResult( 1155659Sgblack@eecs.umich.edu stringToRegister(cleanName + offset + 0), 1165659Sgblack@eecs.umich.edu stringToRegister(cleanName + offset + 4), 1176068Sgblack@eecs.umich.edu stringToRegister(cleanName + offset + 12), 1186068Sgblack@eecs.umich.edu stringToRegister(cleanName + offset + 8)); 1195659Sgblack@eecs.umich.edu } 1205659Sgblack@eecs.umich.edu break; 1215659Sgblack@eecs.umich.edu case L1CacheAndTLB: 1225659Sgblack@eecs.umich.edu result = CpuidResult(0xff08ff08, 0xff20ff20, 1235659Sgblack@eecs.umich.edu 0x40020140, 0x40020140); 1245659Sgblack@eecs.umich.edu break; 1255659Sgblack@eecs.umich.edu case L2L3CacheAndL2TLB: 1265659Sgblack@eecs.umich.edu result = CpuidResult(0x00000000, 0x42004200, 1275659Sgblack@eecs.umich.edu 0x00000000, 0x04008140); 1285659Sgblack@eecs.umich.edu break; 1295659Sgblack@eecs.umich.edu case APMInfo: 1305659Sgblack@eecs.umich.edu result = CpuidResult(0x80000018, 0x68747541, 1315659Sgblack@eecs.umich.edu 0x69746e65, 0x444d4163); 1325659Sgblack@eecs.umich.edu break; 1335659Sgblack@eecs.umich.edu/* case LongModeAddressSize: 1345659Sgblack@eecs.umich.edu case SVMInfo: 1355659Sgblack@eecs.umich.edu case TLB1GBPageInfo: 1365659Sgblack@eecs.umich.edu case PerformanceInfo:*/ 1375659Sgblack@eecs.umich.edu default: 1389124Snilay@cs.wisc.edu warn("x86 cpuid: unimplemented function %u", funcNum); 1395659Sgblack@eecs.umich.edu return false; 1405659Sgblack@eecs.umich.edu } 1415659Sgblack@eecs.umich.edu } else if(family == 0x0000) { 1425659Sgblack@eecs.umich.edu // The standard functions 1435659Sgblack@eecs.umich.edu switch (funcNum) { 1445659Sgblack@eecs.umich.edu case VendorAndLargestStdFunc: 1455659Sgblack@eecs.umich.edu assert(vendorStringSize >= 12); 1465659Sgblack@eecs.umich.edu result = CpuidResult( 1475659Sgblack@eecs.umich.edu NumStandardCpuidFuncs - 1, 1485659Sgblack@eecs.umich.edu stringToRegister(vendorString), 1495659Sgblack@eecs.umich.edu stringToRegister(vendorString + 4), 1505659Sgblack@eecs.umich.edu stringToRegister(vendorString + 8)); 1515659Sgblack@eecs.umich.edu break; 1525659Sgblack@eecs.umich.edu case FamilyModelStepping: 1539473Snilay@cs.wisc.edu result = CpuidResult(0x00020f51, 0x00000805, 1549473Snilay@cs.wisc.edu 0xe7dbfbff, 0x00000001); 1555659Sgblack@eecs.umich.edu break; 1565659Sgblack@eecs.umich.edu default: 1579124Snilay@cs.wisc.edu warn("x86 cpuid: unimplemented function %u", funcNum); 1585659Sgblack@eecs.umich.edu return false; 1595659Sgblack@eecs.umich.edu } 1609124Snilay@cs.wisc.edu } else { 1619124Snilay@cs.wisc.edu warn("x86 cpuid: unknown family %#x", family); 1629124Snilay@cs.wisc.edu return false; 1635659Sgblack@eecs.umich.edu } 1649124Snilay@cs.wisc.edu 1655659Sgblack@eecs.umich.edu return true; 1665659Sgblack@eecs.umich.edu } 1677811Ssteve.reinhardt@amd.com} // namespace X86ISA 168