simple_thread.cc revision 1070
1/* 2 * Copyright (c) 2001-2004 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29#include <string> 30 31#include "cpu/base_cpu.hh" 32#include "cpu/exec_context.hh" 33 34#ifdef FULL_SYSTEM 35#include "base/cprintf.hh" 36#include "kern/kernel_stats.hh" 37#include "sim/serialize.hh" 38#include "sim/system.hh" 39#else 40#include "sim/process.hh" 41#endif 42 43using namespace std; 44 45// constructor 46#ifdef FULL_SYSTEM 47ExecContext::ExecContext(BaseCPU *_cpu, int _thread_num, System *_sys, 48 AlphaITB *_itb, AlphaDTB *_dtb, 49 FunctionalMemory *_mem) 50 : _status(ExecContext::Unallocated), cpu(_cpu), thread_num(_thread_num), 51 cpu_id(-1), mem(_mem), itb(_itb), dtb(_dtb), system(_sys), 52 memctrl(_sys->memctrl), physmem(_sys->physmem), 53 kernelBinning(system->kernelBinning), bin(kernelBinning->bin), 54 fnbin(kernelBinning->fnbin), func_exe_inst(0), storeCondFailures(0) 55{ 56 kernelStats = new Kernel::Statistics(this); 57 memset(®s, 0, sizeof(RegFile)); 58} 59#else 60ExecContext::ExecContext(BaseCPU *_cpu, int _thread_num, 61 Process *_process, int _asid) 62 : _status(ExecContext::Unallocated), 63 cpu(_cpu), thread_num(_thread_num), cpu_id(-1), 64 process(_process), mem(process->getMemory()), asid(_asid), 65 func_exe_inst(0), storeCondFailures(0) 66{ 67 memset(®s, 0, sizeof(RegFile)); 68} 69 70ExecContext::ExecContext(BaseCPU *_cpu, int _thread_num, 71 FunctionalMemory *_mem, int _asid) 72 : cpu(_cpu), thread_num(_thread_num), process(0), mem(_mem), asid(_asid), 73 func_exe_inst(0), storeCondFailures(0) 74{ 75 memset(®s, 0, sizeof(RegFile)); 76} 77#endif 78 79ExecContext::~ExecContext() 80{ 81#ifdef FULL_SYSTEM 82 delete kernelStats; 83#endif 84} 85 86 87void 88ExecContext::takeOverFrom(ExecContext *oldContext) 89{ 90 // some things should already be set up 91 assert(mem == oldContext->mem); 92#ifdef FULL_SYSTEM 93 assert(system == oldContext->system); 94#else 95 assert(process == oldContext->process); 96#endif 97 98 // copy over functional state 99 _status = oldContext->_status; 100 regs = oldContext->regs; 101 cpu_id = oldContext->cpu_id; 102 func_exe_inst = oldContext->func_exe_inst; 103 104 storeCondFailures = 0; 105 106 oldContext->_status = ExecContext::Unallocated; 107} 108 109#ifdef FULL_SYSTEM 110void 111ExecContext::execute(const StaticInstBase *inst) 112{ 113 assert(kernelStats); 114 system->kernelBinning->execute(this, inst); 115} 116#endif 117 118void 119ExecContext::serialize(ostream &os) 120{ 121 SERIALIZE_ENUM(_status); 122 regs.serialize(os); 123 // thread_num and cpu_id are deterministic from the config 124 SERIALIZE_SCALAR(func_exe_inst); 125 SERIALIZE_SCALAR(inst); 126 127#ifdef FULL_SYSTEM 128 kernelStats->serialize(os); 129#endif 130} 131 132 133void 134ExecContext::unserialize(Checkpoint *cp, const std::string §ion) 135{ 136 UNSERIALIZE_ENUM(_status); 137 regs.unserialize(cp, section); 138 // thread_num and cpu_id are deterministic from the config 139 UNSERIALIZE_SCALAR(func_exe_inst); 140 UNSERIALIZE_SCALAR(inst); 141 142#ifdef FULL_SYSTEM 143 kernelStats->unserialize(cp, section); 144#endif 145} 146 147 148void 149ExecContext::activate(int delay) 150{ 151 if (status() == Active) 152 return; 153 154 _status = Active; 155 cpu->activateContext(thread_num, delay); 156} 157 158void 159ExecContext::suspend() 160{ 161 if (status() == Suspended) 162 return; 163 164#ifdef FULL_SYSTEM 165 // Don't change the status from active if there are pending interrupts 166 if (cpu->check_interrupts()) { 167 assert(status() == Active); 168 return; 169 } 170#endif 171 172 _status = Suspended; 173 cpu->suspendContext(thread_num); 174} 175 176void 177ExecContext::deallocate() 178{ 179 if (status() == Unallocated) 180 return; 181 182 _status = Unallocated; 183 cpu->deallocateContext(thread_num); 184} 185 186void 187ExecContext::halt() 188{ 189 if (status() == Halted) 190 return; 191 192 _status = Halted; 193 cpu->haltContext(thread_num); 194} 195 196 197void 198ExecContext::regStats(const string &name) 199{ 200#ifdef FULL_SYSTEM 201 kernelStats->regStats(name + ".kern"); 202#endif 203} 204 205void 206ExecContext::trap(Fault fault) 207{ 208 //TheISA::trap(fault); //One possible way to do it... 209 210 /** @todo: Going to hack it for now. Do a true fixup later. */ 211#ifdef FULL_SYSTEM 212 ev5_trap(fault); 213#else 214 fatal("fault (%d) detected @ PC 0x%08p", fault, readPC()); 215#endif 216} 217