1/* 2 * Copyright (c) 2010 ARM Limited 3 * All rights reserved 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software 9 * licensed hereunder. You may use the software subject to the license 10 * terms below provided that you ensure that this notice is replicated 11 * unmodified and in its entirety in all distributions of the software, 12 * modified or unmodified, in source code or in binary form. 13 * 14 * Copyright (c) 2004-2006 The Regents of The University of Michigan 15 * All rights reserved. 16 * 17 * Redistribution and use in source and binary forms, with or without 18 * modification, are permitted provided that the following conditions are 19 * met: redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer; 21 * redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution; 24 * neither the name of the copyright holders nor the names of its 25 * contributors may be used to endorse or promote products derived from 26 * this software without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 39 * 40 * Authors: Kevin Lim 41 */ 42 43#include "base/cp_annotate.hh" 44#include "cpu/o3/dyn_inst.hh" 45 46template <class Impl> 47BaseO3DynInst<Impl>::BaseO3DynInst(StaticInstPtr staticInst, 48 TheISA::PCState pc, TheISA::PCState predPC, 49 InstSeqNum seq_num, O3CPU *cpu) 50 : BaseDynInst<Impl>(staticInst, pc, predPC, seq_num, cpu) 51{ 52 initVars(); 53} 54 55template <class Impl> 56BaseO3DynInst<Impl>::BaseO3DynInst(ExtMachInst inst, 57 TheISA::PCState pc, TheISA::PCState predPC, 58 InstSeqNum seq_num, O3CPU *cpu) 59 : BaseDynInst<Impl>(inst, pc, predPC, seq_num, cpu) 60{ 61 initVars(); 62} 63 64template <class Impl> 65BaseO3DynInst<Impl>::BaseO3DynInst(StaticInstPtr &_staticInst) 66 : BaseDynInst<Impl>(_staticInst) 67{ 68 initVars(); 69} 70 71template <class Impl> 72void 73BaseO3DynInst<Impl>::initVars() 74{ 75 // Make sure to have the renamed register entries set to the same 76 // as the normal register entries. It will allow the IQ to work 77 // without any modifications. 78 for (int i = 0; i < this->staticInst->numDestRegs(); i++) { 79 this->_destRegIdx[i] = this->staticInst->destRegIdx(i); 80 } 81 82 for (int i = 0; i < this->staticInst->numSrcRegs(); i++) { 83 this->_srcRegIdx[i] = this->staticInst->srcRegIdx(i); 84 this->_readySrcRegIdx[i] = 0; 85 } 86 87 _numDestMiscRegs = 0;
| 1/* 2 * Copyright (c) 2010 ARM Limited 3 * All rights reserved 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software 9 * licensed hereunder. You may use the software subject to the license 10 * terms below provided that you ensure that this notice is replicated 11 * unmodified and in its entirety in all distributions of the software, 12 * modified or unmodified, in source code or in binary form. 13 * 14 * Copyright (c) 2004-2006 The Regents of The University of Michigan 15 * All rights reserved. 16 * 17 * Redistribution and use in source and binary forms, with or without 18 * modification, are permitted provided that the following conditions are 19 * met: redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer; 21 * redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution; 24 * neither the name of the copyright holders nor the names of its 25 * contributors may be used to endorse or promote products derived from 26 * this software without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 39 * 40 * Authors: Kevin Lim 41 */ 42 43#include "base/cp_annotate.hh" 44#include "cpu/o3/dyn_inst.hh" 45 46template <class Impl> 47BaseO3DynInst<Impl>::BaseO3DynInst(StaticInstPtr staticInst, 48 TheISA::PCState pc, TheISA::PCState predPC, 49 InstSeqNum seq_num, O3CPU *cpu) 50 : BaseDynInst<Impl>(staticInst, pc, predPC, seq_num, cpu) 51{ 52 initVars(); 53} 54 55template <class Impl> 56BaseO3DynInst<Impl>::BaseO3DynInst(ExtMachInst inst, 57 TheISA::PCState pc, TheISA::PCState predPC, 58 InstSeqNum seq_num, O3CPU *cpu) 59 : BaseDynInst<Impl>(inst, pc, predPC, seq_num, cpu) 60{ 61 initVars(); 62} 63 64template <class Impl> 65BaseO3DynInst<Impl>::BaseO3DynInst(StaticInstPtr &_staticInst) 66 : BaseDynInst<Impl>(_staticInst) 67{ 68 initVars(); 69} 70 71template <class Impl> 72void 73BaseO3DynInst<Impl>::initVars() 74{ 75 // Make sure to have the renamed register entries set to the same 76 // as the normal register entries. It will allow the IQ to work 77 // without any modifications. 78 for (int i = 0; i < this->staticInst->numDestRegs(); i++) { 79 this->_destRegIdx[i] = this->staticInst->destRegIdx(i); 80 } 81 82 for (int i = 0; i < this->staticInst->numSrcRegs(); i++) { 83 this->_srcRegIdx[i] = this->staticInst->srcRegIdx(i); 84 this->_readySrcRegIdx[i] = 0; 85 } 86 87 _numDestMiscRegs = 0;
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88} 89 90template <class Impl> 91Fault 92BaseO3DynInst<Impl>::execute() 93{ 94 // @todo: Pretty convoluted way to avoid squashing from happening 95 // when using the TC during an instruction's execution 96 // (specifically for instructions that have side-effects that use 97 // the TC). Fix this. 98 bool in_syscall = this->thread->inSyscall; 99 this->thread->inSyscall = true; 100 101 this->fault = this->staticInst->execute(this, this->traceData); 102 103 this->thread->inSyscall = in_syscall; 104 105 return this->fault; 106} 107 108template <class Impl> 109Fault 110BaseO3DynInst<Impl>::initiateAcc() 111{ 112 // @todo: Pretty convoluted way to avoid squashing from happening 113 // when using the TC during an instruction's execution 114 // (specifically for instructions that have side-effects that use 115 // the TC). Fix this. 116 bool in_syscall = this->thread->inSyscall; 117 this->thread->inSyscall = true; 118 119 this->fault = this->staticInst->initiateAcc(this, this->traceData); 120 121 this->thread->inSyscall = in_syscall; 122 123 return this->fault; 124} 125 126template <class Impl> 127Fault 128BaseO3DynInst<Impl>::completeAcc(PacketPtr pkt) 129{ 130 // @todo: Pretty convoluted way to avoid squashing from happening 131 // when using the TC during an instruction's execution 132 // (specifically for instructions that have side-effects that use 133 // the TC). Fix this. 134 bool in_syscall = this->thread->inSyscall; 135 this->thread->inSyscall = true; 136 137 this->fault = this->staticInst->completeAcc(pkt, this, this->traceData); 138 139 this->thread->inSyscall = in_syscall; 140 141 return this->fault; 142} 143 144#if FULL_SYSTEM 145template <class Impl> 146Fault 147BaseO3DynInst<Impl>::hwrei() 148{ 149#if THE_ISA == ALPHA_ISA 150 // Can only do a hwrei when in pal mode. 151 if (!(this->instAddr() & 0x3)) 152 return new AlphaISA::UnimplementedOpcodeFault; 153 154 // Set the next PC based on the value of the EXC_ADDR IPR. 155 AlphaISA::PCState pc = this->pcState(); 156 pc.npc(this->cpu->readMiscRegNoEffect(AlphaISA::IPR_EXC_ADDR, 157 this->threadNumber)); 158 this->pcState(pc); 159 if (CPA::available()) { 160 ThreadContext *tc = this->cpu->tcBase(this->threadNumber); 161 CPA::cpa()->swAutoBegin(tc, this->nextInstAddr()); 162 } 163 164 // Tell CPU to clear any state it needs to if a hwrei is taken. 165 this->cpu->hwrei(this->threadNumber); 166#else 167 168#endif 169 // FIXME: XXX check for interrupts? XXX 170 return NoFault; 171} 172 173template <class Impl> 174void 175BaseO3DynInst<Impl>::trap(Fault fault) 176{ 177 this->cpu->trap(fault, this->threadNumber, this->staticInst); 178} 179 180template <class Impl> 181bool 182BaseO3DynInst<Impl>::simPalCheck(int palFunc) 183{ 184#if THE_ISA != ALPHA_ISA 185 panic("simPalCheck called, but PAL only exists in Alpha!\n"); 186#endif 187 return this->cpu->simPalCheck(palFunc, this->threadNumber); 188} 189#else 190template <class Impl> 191void 192BaseO3DynInst<Impl>::syscall(int64_t callnum) 193{ 194 // HACK: check CPU's nextPC before and after syscall. If it 195 // changes, update this instruction's nextPC because the syscall 196 // must have changed the nextPC. 197 TheISA::PCState curPC = this->cpu->pcState(this->threadNumber); 198 this->cpu->syscall(callnum, this->threadNumber); 199 TheISA::PCState newPC = this->cpu->pcState(this->threadNumber); 200 if (!(curPC == newPC)) { 201 this->pcState(newPC); 202 } 203} 204#endif 205
| 97} 98 99template <class Impl> 100Fault 101BaseO3DynInst<Impl>::execute() 102{ 103 // @todo: Pretty convoluted way to avoid squashing from happening 104 // when using the TC during an instruction's execution 105 // (specifically for instructions that have side-effects that use 106 // the TC). Fix this. 107 bool in_syscall = this->thread->inSyscall; 108 this->thread->inSyscall = true; 109 110 this->fault = this->staticInst->execute(this, this->traceData); 111 112 this->thread->inSyscall = in_syscall; 113 114 return this->fault; 115} 116 117template <class Impl> 118Fault 119BaseO3DynInst<Impl>::initiateAcc() 120{ 121 // @todo: Pretty convoluted way to avoid squashing from happening 122 // when using the TC during an instruction's execution 123 // (specifically for instructions that have side-effects that use 124 // the TC). Fix this. 125 bool in_syscall = this->thread->inSyscall; 126 this->thread->inSyscall = true; 127 128 this->fault = this->staticInst->initiateAcc(this, this->traceData); 129 130 this->thread->inSyscall = in_syscall; 131 132 return this->fault; 133} 134 135template <class Impl> 136Fault 137BaseO3DynInst<Impl>::completeAcc(PacketPtr pkt) 138{ 139 // @todo: Pretty convoluted way to avoid squashing from happening 140 // when using the TC during an instruction's execution 141 // (specifically for instructions that have side-effects that use 142 // the TC). Fix this. 143 bool in_syscall = this->thread->inSyscall; 144 this->thread->inSyscall = true; 145 146 this->fault = this->staticInst->completeAcc(pkt, this, this->traceData); 147 148 this->thread->inSyscall = in_syscall; 149 150 return this->fault; 151} 152 153#if FULL_SYSTEM 154template <class Impl> 155Fault 156BaseO3DynInst<Impl>::hwrei() 157{ 158#if THE_ISA == ALPHA_ISA 159 // Can only do a hwrei when in pal mode. 160 if (!(this->instAddr() & 0x3)) 161 return new AlphaISA::UnimplementedOpcodeFault; 162 163 // Set the next PC based on the value of the EXC_ADDR IPR. 164 AlphaISA::PCState pc = this->pcState(); 165 pc.npc(this->cpu->readMiscRegNoEffect(AlphaISA::IPR_EXC_ADDR, 166 this->threadNumber)); 167 this->pcState(pc); 168 if (CPA::available()) { 169 ThreadContext *tc = this->cpu->tcBase(this->threadNumber); 170 CPA::cpa()->swAutoBegin(tc, this->nextInstAddr()); 171 } 172 173 // Tell CPU to clear any state it needs to if a hwrei is taken. 174 this->cpu->hwrei(this->threadNumber); 175#else 176 177#endif 178 // FIXME: XXX check for interrupts? XXX 179 return NoFault; 180} 181 182template <class Impl> 183void 184BaseO3DynInst<Impl>::trap(Fault fault) 185{ 186 this->cpu->trap(fault, this->threadNumber, this->staticInst); 187} 188 189template <class Impl> 190bool 191BaseO3DynInst<Impl>::simPalCheck(int palFunc) 192{ 193#if THE_ISA != ALPHA_ISA 194 panic("simPalCheck called, but PAL only exists in Alpha!\n"); 195#endif 196 return this->cpu->simPalCheck(palFunc, this->threadNumber); 197} 198#else 199template <class Impl> 200void 201BaseO3DynInst<Impl>::syscall(int64_t callnum) 202{ 203 // HACK: check CPU's nextPC before and after syscall. If it 204 // changes, update this instruction's nextPC because the syscall 205 // must have changed the nextPC. 206 TheISA::PCState curPC = this->cpu->pcState(this->threadNumber); 207 this->cpu->syscall(callnum, this->threadNumber); 208 TheISA::PCState newPC = this->cpu->pcState(this->threadNumber); 209 if (!(curPC == newPC)) { 210 this->pcState(newPC); 211 } 212} 213#endif 214
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