src/sim/faults.hh

   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: Nathan Binkert
  29  *          Gabe Black
  30  */
  31
  32 #ifndef __FAULTS_HH__
  33 #define __FAULTS_HH__
  34
  35 #include "base/refcnt.hh"
  36 #include "base/types.hh"
  37 #include "config/full_system.hh"
  38 #include "cpu/static_inst.hh"
  39 #include "sim/fault_fwd.hh"
  40 #include "sim/stats.hh"
  41
  42 class ThreadContext;
  43
  44 typedef const char * FaultName;
  45 typedef Stats::Scalar FaultStat;
  46
  47 // Each class has it's name statically define in _name,
  48 // and has a virtual function to access it's name.
  49 // The function is necessary because otherwise, all objects
  50 // which are being accessed cast as a FaultBase * (namely
  51 // all faults returned using the Fault type) will use the
  52 // generic FaultBase name.
  53
  54 class FaultBase : public RefCounted
  55 {
  56   public:
  57     virtual FaultName name() const = 0;
  58     virtual void invoke(ThreadContext * tc,
  59             StaticInstPtr inst = StaticInst::nullStaticInstPtr);
  60 };
  61
  62 class UnimpFault : public FaultBase
  63 {
  64   private:
  65     std::string panicStr;
  66   public:
  67     UnimpFault(std::string _str)
  68         : panicStr(_str)
  69     { }
  70
  71     FaultName name() const {return "Unimplemented simulator feature";}
  72     void invoke(ThreadContext * tc,
  73             StaticInstPtr inst = StaticInst::nullStaticInstPtr);
  74 };
  75
  76 class ReExec : public FaultBase
  77 {
  78   public:
  79     virtual FaultName name() const { return "Re-execution fault";}
  80     ReExec() {}
  81     void invoke(ThreadContext *tc,
  82             StaticInstPtr inst = StaticInst::nullStaticInstPtr);
  83 };
  84
  85 class GenericPageTableFault : public FaultBase
  86 {
  87   private:
  88     Addr vaddr;
  89   public:
  90     FaultName name() const {return "Generic page table fault";}
  91     GenericPageTableFault(Addr va) : vaddr(va) {}
  92     void invoke(ThreadContext * tc,
  93             StaticInstPtr inst = StaticInst::nullStaticInstPtr);
  94 };
  95
  96 class GenericAlignmentFault : public FaultBase
  97 {
  98   private:
  99     Addr vaddr;
 100   public:
 101     FaultName name() const {return "Generic alignment fault";}
 102     GenericAlignmentFault(Addr va) : vaddr(va) {}
 103     void invoke(ThreadContext * tc,
 104             StaticInstPtr inst = StaticInst::nullStaticInstPtr);
 105 };
 106
 107 #endif // __FAULTS_HH__