thread_context.cc revision 12334
1/* 2 * Copyright (c) 2012, 2016 ARM Limited 3 * Copyright (c) 2013 Advanced Micro Devices, Inc. 4 * All rights reserved 5 * 6 * The license below extends only to copyright in the software and shall 7 * not be construed as granting a license to any other intellectual 8 * property including but not limited to intellectual property relating 9 * to a hardware implementation of the functionality of the software 10 * licensed hereunder. You may use the software subject to the license 11 * terms below provided that you ensure that this notice is replicated 12 * unmodified and in its entirety in all distributions of the software, 13 * modified or unmodified, in source code or in binary form. 14 * 15 * Copyright (c) 2006 The Regents of The University of Michigan 16 * All rights reserved. 17 * 18 * Redistribution and use in source and binary forms, with or without 19 * modification, are permitted provided that the following conditions are 20 * met: redistributions of source code must retain the above copyright 21 * notice, this list of conditions and the following disclaimer; 22 * redistributions in binary form must reproduce the above copyright 23 * notice, this list of conditions and the following disclaimer in the 24 * documentation and/or other materials provided with the distribution; 25 * neither the name of the copyright holders nor the names of its 26 * contributors may be used to endorse or promote products derived from 27 * this software without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 30 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 31 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 32 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 33 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 34 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 35 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 36 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 37 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 38 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 39 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 40 * 41 * Authors: Kevin Lim 42 */ 43 44#include "cpu/thread_context.hh" 45 46#include "arch/kernel_stats.hh" 47#include "base/logging.hh" 48#include "base/trace.hh" 49#include "config/the_isa.hh" 50#include "cpu/base.hh" 51#include "cpu/quiesce_event.hh" 52#include "debug/Context.hh" 53#include "debug/Quiesce.hh" 54#include "params/BaseCPU.hh" 55#include "sim/full_system.hh" 56 57void 58ThreadContext::compare(ThreadContext *one, ThreadContext *two) 59{ 60 DPRINTF(Context, "Comparing thread contexts\n"); 61 62 // First loop through the integer registers. 63 for (int i = 0; i < TheISA::NumIntRegs; ++i) { 64 TheISA::IntReg t1 = one->readIntReg(i); 65 TheISA::IntReg t2 = two->readIntReg(i); 66 if (t1 != t2) 67 panic("Int reg idx %d doesn't match, one: %#x, two: %#x", 68 i, t1, t2); 69 } 70 71 // Then loop through the floating point registers. 72 for (int i = 0; i < TheISA::NumFloatRegs; ++i) { 73 TheISA::FloatRegBits t1 = one->readFloatRegBits(i); 74 TheISA::FloatRegBits t2 = two->readFloatRegBits(i); 75 if (t1 != t2) 76 panic("Float reg idx %d doesn't match, one: %#x, two: %#x", 77 i, t1, t2); 78 } 79 80 // Then loop through the vector registers. 81 for (int i = 0; i < TheISA::NumVecRegs; ++i) { 82 RegId rid(VecRegClass, i); 83 const TheISA::VecRegContainer& t1 = one->readVecReg(rid); 84 const TheISA::VecRegContainer& t2 = two->readVecReg(rid); 85 if (t1 != t2) 86 panic("Vec reg idx %d doesn't match, one: %#x, two: %#x", 87 i, t1, t2); 88 } 89 for (int i = 0; i < TheISA::NumMiscRegs; ++i) { 90 TheISA::MiscReg t1 = one->readMiscRegNoEffect(i); 91 TheISA::MiscReg t2 = two->readMiscRegNoEffect(i); 92 if (t1 != t2) 93 panic("Misc reg idx %d doesn't match, one: %#x, two: %#x", 94 i, t1, t2); 95 } 96 97 // loop through the Condition Code registers. 98 for (int i = 0; i < TheISA::NumCCRegs; ++i) { 99 TheISA::CCReg t1 = one->readCCReg(i); 100 TheISA::CCReg t2 = two->readCCReg(i); 101 if (t1 != t2) 102 panic("CC reg idx %d doesn't match, one: %#x, two: %#x", 103 i, t1, t2); 104 } 105 if (!(one->pcState() == two->pcState())) 106 panic("PC state doesn't match."); 107 int id1 = one->cpuId(); 108 int id2 = two->cpuId(); 109 if (id1 != id2) 110 panic("CPU ids don't match, one: %d, two: %d", id1, id2); 111 112 const ContextID cid1 = one->contextId(); 113 const ContextID cid2 = two->contextId(); 114 if (cid1 != cid2) 115 panic("Context ids don't match, one: %d, two: %d", id1, id2); 116 117 118} 119 120void 121ThreadContext::quiesce() 122{ 123 if (!getCpuPtr()->params()->do_quiesce) 124 return; 125 126 DPRINTF(Quiesce, "%s: quiesce()\n", getCpuPtr()->name()); 127 128 suspend(); 129 if (getKernelStats()) 130 getKernelStats()->quiesce(); 131} 132 133 134void 135ThreadContext::quiesceTick(Tick resume) 136{ 137 BaseCPU *cpu = getCpuPtr(); 138 139 if (!cpu->params()->do_quiesce) 140 return; 141 142 EndQuiesceEvent *quiesceEvent = getQuiesceEvent(); 143 144 cpu->reschedule(quiesceEvent, resume, true); 145 146 DPRINTF(Quiesce, "%s: quiesceTick until %lu\n", cpu->name(), resume); 147 148 suspend(); 149 if (getKernelStats()) 150 getKernelStats()->quiesce(); 151} 152 153void 154serialize(ThreadContext &tc, CheckpointOut &cp) 155{ 156 using namespace TheISA; 157 158 FloatRegBits floatRegs[NumFloatRegs]; 159 for (int i = 0; i < NumFloatRegs; ++i) 160 floatRegs[i] = tc.readFloatRegBitsFlat(i); 161 // This is a bit ugly, but needed to maintain backwards 162 // compatibility. 163 arrayParamOut(cp, "floatRegs.i", floatRegs, NumFloatRegs); 164 165 std::vector<TheISA::VecRegContainer> vecRegs(NumVecRegs); 166 for (int i = 0; i < NumVecRegs; ++i) { 167 vecRegs[i] = tc.readVecRegFlat(i); 168 } 169 SERIALIZE_CONTAINER(vecRegs); 170 171 IntReg intRegs[NumIntRegs]; 172 for (int i = 0; i < NumIntRegs; ++i) 173 intRegs[i] = tc.readIntRegFlat(i); 174 SERIALIZE_ARRAY(intRegs, NumIntRegs); 175 176#ifdef ISA_HAS_CC_REGS 177 CCReg ccRegs[NumCCRegs]; 178 for (int i = 0; i < NumCCRegs; ++i) 179 ccRegs[i] = tc.readCCRegFlat(i); 180 SERIALIZE_ARRAY(ccRegs, NumCCRegs); 181#endif 182 183 tc.pcState().serialize(cp); 184 185 // thread_num and cpu_id are deterministic from the config 186} 187 188void 189unserialize(ThreadContext &tc, CheckpointIn &cp) 190{ 191 using namespace TheISA; 192 193 FloatRegBits floatRegs[NumFloatRegs]; 194 // This is a bit ugly, but needed to maintain backwards 195 // compatibility. 196 arrayParamIn(cp, "floatRegs.i", floatRegs, NumFloatRegs); 197 for (int i = 0; i < NumFloatRegs; ++i) 198 tc.setFloatRegBitsFlat(i, floatRegs[i]); 199 200 std::vector<TheISA::VecRegContainer> vecRegs(NumVecRegs); 201 UNSERIALIZE_CONTAINER(vecRegs); 202 for (int i = 0; i < NumVecRegs; ++i) { 203 tc.setVecRegFlat(i, vecRegs[i]); 204 } 205 206 IntReg intRegs[NumIntRegs]; 207 UNSERIALIZE_ARRAY(intRegs, NumIntRegs); 208 for (int i = 0; i < NumIntRegs; ++i) 209 tc.setIntRegFlat(i, intRegs[i]); 210 211#ifdef ISA_HAS_CC_REGS 212 CCReg ccRegs[NumCCRegs]; 213 UNSERIALIZE_ARRAY(ccRegs, NumCCRegs); 214 for (int i = 0; i < NumCCRegs; ++i) 215 tc.setCCRegFlat(i, ccRegs[i]); 216#endif 217 218 PCState pcState; 219 pcState.unserialize(cp); 220 tc.pcState(pcState); 221 222 // thread_num and cpu_id are deterministic from the config 223} 224 225void 226takeOverFrom(ThreadContext &ntc, ThreadContext &otc) 227{ 228 assert(ntc.getProcessPtr() == otc.getProcessPtr()); 229 230 ntc.setStatus(otc.status()); 231 ntc.copyArchRegs(&otc); 232 ntc.setContextId(otc.contextId()); 233 ntc.setThreadId(otc.threadId()); 234 235 if (FullSystem) { 236 assert(ntc.getSystemPtr() == otc.getSystemPtr()); 237 238 BaseCPU *ncpu(ntc.getCpuPtr()); 239 assert(ncpu); 240 EndQuiesceEvent *oqe(otc.getQuiesceEvent()); 241 assert(oqe); 242 assert(oqe->tc == &otc); 243 244 BaseCPU *ocpu(otc.getCpuPtr()); 245 assert(ocpu); 246 EndQuiesceEvent *nqe(ntc.getQuiesceEvent()); 247 assert(nqe); 248 assert(nqe->tc == &ntc); 249 250 if (oqe->scheduled()) { 251 ncpu->schedule(nqe, oqe->when()); 252 ocpu->deschedule(oqe); 253 } 254 } 255 256 otc.setStatus(ThreadContext::Halted); 257} 258