faults.cc revision 4183:3d19c1d46946
1/* 2 * Copyright (c) 2003-2005 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 * Authors: Gabe Black 29 * Kevin Lim 30 */ 31 32#include "arch/alpha/faults.hh" 33#include "cpu/thread_context.hh" 34#include "cpu/base.hh" 35#include "base/trace.hh" 36#if FULL_SYSTEM 37#include "arch/alpha/ev5.hh" 38#else 39#include "sim/process.hh" 40#include "mem/page_table.hh" 41#endif 42 43namespace AlphaISA 44{ 45 46FaultName MachineCheckFault::_name = "mchk"; 47FaultVect MachineCheckFault::_vect = 0x0401; 48FaultStat MachineCheckFault::_count; 49 50FaultName AlignmentFault::_name = "unalign"; 51FaultVect AlignmentFault::_vect = 0x0301; 52FaultStat AlignmentFault::_count; 53 54FaultName ResetFault::_name = "reset"; 55FaultVect ResetFault::_vect = 0x0001; 56FaultStat ResetFault::_count; 57 58FaultName ArithmeticFault::_name = "arith"; 59FaultVect ArithmeticFault::_vect = 0x0501; 60FaultStat ArithmeticFault::_count; 61 62FaultName InterruptFault::_name = "interrupt"; 63FaultVect InterruptFault::_vect = 0x0101; 64FaultStat InterruptFault::_count; 65 66FaultName NDtbMissFault::_name = "dtb_miss_single"; 67FaultVect NDtbMissFault::_vect = 0x0201; 68FaultStat NDtbMissFault::_count; 69 70FaultName PDtbMissFault::_name = "dtb_miss_double"; 71FaultVect PDtbMissFault::_vect = 0x0281; 72FaultStat PDtbMissFault::_count; 73 74FaultName DtbPageFault::_name = "dfault"; 75FaultVect DtbPageFault::_vect = 0x0381; 76FaultStat DtbPageFault::_count; 77 78FaultName DtbAcvFault::_name = "dfault"; 79FaultVect DtbAcvFault::_vect = 0x0381; 80FaultStat DtbAcvFault::_count; 81 82FaultName DtbAlignmentFault::_name = "unalign"; 83FaultVect DtbAlignmentFault::_vect = 0x0301; 84FaultStat DtbAlignmentFault::_count; 85 86FaultName ItbMissFault::_name = "itbmiss"; 87FaultVect ItbMissFault::_vect = 0x0181; 88FaultStat ItbMissFault::_count; 89 90FaultName ItbPageFault::_name = "itbmiss"; 91FaultVect ItbPageFault::_vect = 0x0181; 92FaultStat ItbPageFault::_count; 93 94FaultName ItbAcvFault::_name = "iaccvio"; 95FaultVect ItbAcvFault::_vect = 0x0081; 96FaultStat ItbAcvFault::_count; 97 98FaultName UnimplementedOpcodeFault::_name = "opdec"; 99FaultVect UnimplementedOpcodeFault::_vect = 0x0481; 100FaultStat UnimplementedOpcodeFault::_count; 101 102FaultName FloatEnableFault::_name = "fen"; 103FaultVect FloatEnableFault::_vect = 0x0581; 104FaultStat FloatEnableFault::_count; 105 106FaultName PalFault::_name = "pal"; 107FaultVect PalFault::_vect = 0x2001; 108FaultStat PalFault::_count; 109 110FaultName IntegerOverflowFault::_name = "intover"; 111FaultVect IntegerOverflowFault::_vect = 0x0501; 112FaultStat IntegerOverflowFault::_count; 113 114#if FULL_SYSTEM 115 116void AlphaFault::invoke(ThreadContext * tc) 117{ 118 FaultBase::invoke(tc); 119 countStat()++; 120 121 // exception restart address 122 if (setRestartAddress() || !(tc->readPC() & 0x3)) 123 tc->setMiscRegNoEffect(AlphaISA::IPR_EXC_ADDR, tc->readPC()); 124 125 if (skipFaultingInstruction()) { 126 // traps... skip faulting instruction. 127 tc->setMiscRegNoEffect(AlphaISA::IPR_EXC_ADDR, 128 tc->readMiscRegNoEffect(AlphaISA::IPR_EXC_ADDR) + 4); 129 } 130 131 tc->setPC(tc->readMiscRegNoEffect(AlphaISA::IPR_PAL_BASE) + vect()); 132 tc->setNextPC(tc->readPC() + sizeof(MachInst)); 133} 134 135void ArithmeticFault::invoke(ThreadContext * tc) 136{ 137 FaultBase::invoke(tc); 138 panic("Arithmetic traps are unimplemented!"); 139} 140 141void DtbFault::invoke(ThreadContext * tc) 142{ 143 // Set fault address and flags. Even though we're modeling an 144 // EV5, we use the EV6 technique of not latching fault registers 145 // on VPTE loads (instead of locking the registers until IPR_VA is 146 // read, like the EV5). The EV6 approach is cleaner and seems to 147 // work with EV5 PAL code, but not the other way around. 148 if (!tc->misspeculating() 149 && !(reqFlags & VPTE) && !(reqFlags & NO_FAULT)) { 150 // set VA register with faulting address 151 tc->setMiscRegNoEffect(AlphaISA::IPR_VA, vaddr); 152 153 // set MM_STAT register flags 154 tc->setMiscRegNoEffect(AlphaISA::IPR_MM_STAT, 155 (((EV5::Opcode(tc->getInst()) & 0x3f) << 11) 156 | ((EV5::Ra(tc->getInst()) & 0x1f) << 6) 157 | (flags & 0x3f))); 158 159 // set VA_FORM register with faulting formatted address 160 tc->setMiscRegNoEffect(AlphaISA::IPR_VA_FORM, 161 tc->readMiscRegNoEffect(AlphaISA::IPR_MVPTBR) | (vaddr.vpn() << 3)); 162 } 163 164 AlphaFault::invoke(tc); 165} 166 167void ItbFault::invoke(ThreadContext * tc) 168{ 169 if (!tc->misspeculating()) { 170 tc->setMiscRegNoEffect(AlphaISA::IPR_ITB_TAG, pc); 171 tc->setMiscRegNoEffect(AlphaISA::IPR_IFAULT_VA_FORM, 172 tc->readMiscRegNoEffect(AlphaISA::IPR_IVPTBR) | 173 (AlphaISA::VAddr(pc).vpn() << 3)); 174 } 175 176 AlphaFault::invoke(tc); 177} 178 179#endif 180 181} // namespace AlphaISA 182 183