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