simple_thread.cc revision 223
112854Sgabeblack@google.com/* 212854Sgabeblack@google.com * Copyright (c) 2003 The Regents of The University of Michigan 312854Sgabeblack@google.com * All rights reserved. 412854Sgabeblack@google.com * 512854Sgabeblack@google.com * Redistribution and use in source and binary forms, with or without 612854Sgabeblack@google.com * modification, are permitted provided that the following conditions are 712854Sgabeblack@google.com * met: redistributions of source code must retain the above copyright 812854Sgabeblack@google.com * notice, this list of conditions and the following disclaimer; 912854Sgabeblack@google.com * redistributions in binary form must reproduce the above copyright 1012854Sgabeblack@google.com * notice, this list of conditions and the following disclaimer in the 1112854Sgabeblack@google.com * documentation and/or other materials provided with the distribution; 1212854Sgabeblack@google.com * neither the name of the copyright holders nor the names of its 1312854Sgabeblack@google.com * contributors may be used to endorse or promote products derived from 1412854Sgabeblack@google.com * this software without specific prior written permission. 1512854Sgabeblack@google.com * 1612854Sgabeblack@google.com * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 1712854Sgabeblack@google.com * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 1812854Sgabeblack@google.com * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 1912854Sgabeblack@google.com * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 2012854Sgabeblack@google.com * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 2112854Sgabeblack@google.com * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 2212854Sgabeblack@google.com * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2312854Sgabeblack@google.com * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2412854Sgabeblack@google.com * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2512854Sgabeblack@google.com * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 2612854Sgabeblack@google.com * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2712854Sgabeblack@google.com */ 2812854Sgabeblack@google.com 2912854Sgabeblack@google.com#include <string> 3012854Sgabeblack@google.com 3112854Sgabeblack@google.com#include "cpu/base_cpu.hh" 3212854Sgabeblack@google.com#include "cpu/exec_context.hh" 3312854Sgabeblack@google.com 3412854Sgabeblack@google.com#ifdef FULL_SYSTEM 3512854Sgabeblack@google.com#include "sim/system.hh" 3612854Sgabeblack@google.com#else 3712854Sgabeblack@google.com#include "sim/prog.hh" 3812854Sgabeblack@google.com#endif 3912854Sgabeblack@google.com 4012854Sgabeblack@google.comusing namespace std; 4112854Sgabeblack@google.com 4212854Sgabeblack@google.com// constructor 4312854Sgabeblack@google.com#ifdef FULL_SYSTEM 4412854Sgabeblack@google.comExecContext::ExecContext(BaseCPU *_cpu, int _thread_num, System *_sys, 4512854Sgabeblack@google.com AlphaItb *_itb, AlphaDtb *_dtb, 4612854Sgabeblack@google.com FunctionalMemory *_mem) 4712854Sgabeblack@google.com : _status(ExecContext::Unallocated), 4812854Sgabeblack@google.com kernelStats(this, _cpu), cpu(_cpu), thread_num(_thread_num), 4912854Sgabeblack@google.com cpu_id(-1), mem(_mem), itb(_itb), dtb(_dtb), system(_sys), 5012854Sgabeblack@google.com memCtrl(_sys->memCtrl), physmem(_sys->physmem), 5112854Sgabeblack@google.com func_exe_insn(0), storeCondFailures(0) 5212854Sgabeblack@google.com{ 5312854Sgabeblack@google.com memset(®s, 0, sizeof(RegFile)); 5412854Sgabeblack@google.com} 5512854Sgabeblack@google.com#else 5612854Sgabeblack@google.comExecContext::ExecContext(BaseCPU *_cpu, int _thread_num, 5712854Sgabeblack@google.com Process *_process, int _asid) 5812854Sgabeblack@google.com : _status(ExecContext::Unallocated), 5912854Sgabeblack@google.com cpu(_cpu), thread_num(_thread_num), cpu_id(-1), 6012854Sgabeblack@google.com process(_process), mem(process->getMemory()), asid(_asid), 6112854Sgabeblack@google.com func_exe_insn(0), storeCondFailures(0) 6212854Sgabeblack@google.com{ 6312854Sgabeblack@google.com} 6412854Sgabeblack@google.com 6512854Sgabeblack@google.comExecContext::ExecContext(BaseCPU *_cpu, int _thread_num, 6612854Sgabeblack@google.com FunctionalMemory *_mem, int _asid) 6712854Sgabeblack@google.com : cpu(_cpu), thread_num(_thread_num), process(0), mem(_mem), asid(_asid), 6812854Sgabeblack@google.com func_exe_insn(0), storeCondFailures(0) 6912854Sgabeblack@google.com{ 7012854Sgabeblack@google.com} 7112854Sgabeblack@google.com#endif 7212854Sgabeblack@google.com 73 74void 75ExecContext::takeOverFrom(ExecContext *oldContext) 76{ 77 // some things should already be set up 78 assert(mem == oldContext->mem); 79#ifdef FULL_SYSTEM 80 assert(system == oldContext->system); 81#else 82 assert(process == oldContext->process); 83#endif 84 85 // copy over functional state 86 _status = oldContext->_status; 87#ifdef FULL_SYSTEM 88 kernelStats = oldContext->kernelStats; 89#endif 90 regs = oldContext->regs; 91 cpu_id = oldContext->cpu_id; 92 func_exe_insn = oldContext->func_exe_insn; 93 94 storeCondFailures = 0; 95 96 oldContext->_status = ExecContext::Unallocated; 97} 98 99 100void 101ExecContext::serialize(ostream &os) 102{ 103 SERIALIZE_ENUM(_status); 104 regs.serialize(os); 105 // thread_num and cpu_id are deterministic from the config 106 SERIALIZE_SCALAR(func_exe_insn); 107} 108 109 110void 111ExecContext::unserialize(const IniFile *db, const std::string §ion) 112{ 113 UNSERIALIZE_ENUM(_status); 114 regs.unserialize(db, section); 115 // thread_num and cpu_id are deterministic from the config 116 UNSERIALIZE_SCALAR(func_exe_insn); 117} 118 119 120void 121ExecContext::setStatus(Status new_status) 122{ 123#ifdef FULL_SYSTEM 124 if (status() == new_status) 125 return; 126 127 // Don't change the status from active if there are pending interrupts 128 if (new_status == Suspended && cpu->check_interrupts()) { 129 assert(status() == Active); 130 return; 131 } 132#endif 133 134 _status = new_status; 135 cpu->execCtxStatusChg(thread_num); 136} 137 138void 139ExecContext::regStats(const string &name) 140{ 141#ifdef FULL_SYSTEM 142 kernelStats.regStats(name + ".kern"); 143#endif 144} 145