arch/alpha/faults.cc

   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
  29 #include "arch/alpha/faults.hh"
  30 #include "cpu/exec_context.hh"
  31 #include "cpu/base.hh"
  32 #include "base/trace.hh"
  33 #include "kern/kernel_stats.hh"
  34
  35 namespace AlphaISA
  36 {
  37
  38 FaultName MachineCheckFault::_name = "mchk";
  39 FaultVect MachineCheckFault::_vect = 0x0401;
  40 FaultStat MachineCheckFault::_stat;
  41
  42 FaultName AlignmentFault::_name = "unalign";
  43 FaultVect AlignmentFault::_vect = 0x0301;
  44 FaultStat AlignmentFault::_stat;
  45
  46 FaultName ResetFault::_name = "reset";
  47 FaultVect ResetFault::_vect = 0x0001;
  48 FaultStat ResetFault::_stat;
  49
  50 FaultName ArithmeticFault::_name = "arith";
  51 FaultVect ArithmeticFault::_vect = 0x0501;
  52 FaultStat ArithmeticFault::_stat;
  53
  54 FaultName InterruptFault::_name = "interrupt";
  55 FaultVect InterruptFault::_vect = 0x0101;
  56 FaultStat InterruptFault::_stat;
  57
  58 FaultName NDtbMissFault::_name = "dtb_miss_single";
  59 FaultVect NDtbMissFault::_vect = 0x0201;
  60 FaultStat NDtbMissFault::_stat;
  61
  62 FaultName PDtbMissFault::_name = "dtb_miss_double";
  63 FaultVect PDtbMissFault::_vect = 0x0281;
  64 FaultStat PDtbMissFault::_stat;
  65
  66 FaultName DtbPageFault::_name = "dfault";
  67 FaultVect DtbPageFault::_vect = 0x0381;
  68 FaultStat DtbPageFault::_stat;
  69
  70 FaultName DtbAcvFault::_name = "dfault";
  71 FaultVect DtbAcvFault::_vect = 0x0381;
  72 FaultStat DtbAcvFault::_stat;
  73
  74 FaultName ItbMissFault::_name = "itbmiss";
  75 FaultVect ItbMissFault::_vect = 0x0181;
  76 FaultStat ItbMissFault::_stat;
  77
  78 FaultName ItbPageFault::_name = "itbmiss";
  79 FaultVect ItbPageFault::_vect = 0x0181;
  80 FaultStat ItbPageFault::_stat;
  81
  82 FaultName ItbAcvFault::_name = "iaccvio";
  83 FaultVect ItbAcvFault::_vect = 0x0081;
  84 FaultStat ItbAcvFault::_stat;
  85
  86 FaultName UnimplementedOpcodeFault::_name = "opdec";
  87 FaultVect UnimplementedOpcodeFault::_vect = 0x0481;
  88 FaultStat UnimplementedOpcodeFault::_stat;
  89
  90 FaultName FloatEnableFault::_name = "fen";
  91 FaultVect FloatEnableFault::_vect = 0x0581;
  92 FaultStat FloatEnableFault::_stat;
  93
  94 FaultName PalFault::_name = "pal";
  95 FaultVect PalFault::_vect = 0x2001;
  96 FaultStat PalFault::_stat;
  97
  98 FaultName IntegerOverflowFault::_name = "intover";
  99 FaultVect IntegerOverflowFault::_vect = 0x0501;
 100 FaultStat IntegerOverflowFault::_stat;
 101
 102 #if FULL_SYSTEM
 103
 104 void AlphaFault::invoke(ExecContext * xc)
 105 {
 106     DPRINTF(Fault, "Fault %s at PC: %#x\n", name(), xc->regs.pc);
 107     xc->cpu->recordEvent(csprintf("Fault %s", name()));
 108
 109     assert(!xc->misspeculating());
 110     xc->kernelStats->fault(this);
 111
 112     // exception restart address
 113     if (setRestartAddress() || !xc->inPalMode())
 114         xc->setMiscReg(AlphaISA::IPR_EXC_ADDR, xc->regs.pc);
 115
 116     if (skipFaultingInstruction()) {
 117         // traps...  skip faulting instruction.
 118         xc->setMiscReg(AlphaISA::IPR_EXC_ADDR,
 119                    xc->readMiscReg(AlphaISA::IPR_EXC_ADDR) + 4);
 120     }
 121
 122     xc->regs.pc = xc->readMiscReg(AlphaISA::IPR_PAL_BASE) + vect();
 123     xc->regs.npc = xc->regs.pc + sizeof(MachInst);
 124 }
 125
 126 void ArithmeticFault::invoke(ExecContext * xc)
 127 {
 128     DPRINTF(Fault, "Fault %s at PC: %#x\n", name(), xc->regs.pc);
 129     xc->cpu->recordEvent(csprintf("Fault %s", name()));
 130
 131     assert(!xc->misspeculating());
 132     xc->kernelStats->fault(this);
 133
 134     panic("Arithmetic traps are unimplemented!");
 135 }
 136
 137
 138 /*void ArithmeticFault::invoke(ExecContext * xc)
 139 {
 140     panic("Arithmetic traps are unimplemented!");
 141 }*/
 142
 143 #endif
 144
 145 } // namespace AlphaISA
 146
 147 /*Fault * ListOfFaults[] = {
 148         (Fault *)&NoFault,
 149         (Fault *)&ResetFault,
 150         (Fault *)&MachineCheckFault,
 151         (Fault *)&ArithmeticFault,
 152         (Fault *)&InterruptFault,
 153         (Fault *)&NDtbMissFault,
 154         (Fault *)&PDtbMissFault,
 155         (Fault *)&AlignmentFault,
 156         (Fault *)&DtbPageFault,
 157         (Fault *)&DtbAcvFault,
 158         (Fault *)&ItbMissFault,
 159         (Fault *)&ItbPageFault,
 160         (Fault *)&ItbAcvFault,
 161         (Fault *)&UnimplementedOpcodeFault,
 162         (Fault *)&FloatEnableFault,
 163         (Fault *)&PalFault,
 164         (Fault *)&IntegerOverflowFault,
 165         };
 166
 167 int NumFaults = sizeof(ListOfFaults) / sizeof(Fault *);*/