From 27388c0fe0da3b47e112478c787dd4bc78e32562 Mon Sep 17 00:00:00 2001
From: Gabe Black <gblack@eecs.umich.edu>
Date: Mon, 19 Sep 2011 06:17:19 -0700
Subject: [PATCH] MIPS: Use the CRTP to streamline the Fault class definitions.

CRTP stands for the curiously recurring template pattern.
---
 src/arch/mips/faults.cc | 154 +++++++---------
 src/arch/mips/faults.hh | 380 ++++++----------------------------------
 2 files changed, 121 insertions(+), 413 deletions(-)

diff --git a/src/arch/mips/faults.cc b/src/arch/mips/faults.cc
index 652b5960c..87a69669e 100644
--- a/src/arch/mips/faults.cc
+++ b/src/arch/mips/faults.cc
@@ -46,130 +46,102 @@
 namespace MipsISA
 {
 
-FaultName MachineCheckFault::_name = "Machine Check";
-FaultVect MachineCheckFault::_vect = 0x0401;
-FaultStat MachineCheckFault::_count;
+typedef MipsFaultBase::FaultVals FaultVals;
 
-FaultName AlignmentFault::_name = "Alignment";
-FaultVect AlignmentFault::_vect = 0x0301;
-FaultStat AlignmentFault::_count;
+template <> FaultVals MipsFault<MachineCheckFault>::vals =
+    { "Machine Check", 0x0401 };
 
-FaultName ResetFault::_name = "Reset Fault";
+template <> FaultVals MipsFault<AlignmentFault>::vals =
+    { "Alignment", 0x0301 };
+
+template <> FaultVals MipsFault<ResetFault>::vals =
 #if  FULL_SYSTEM
-FaultVect ResetFault::_vect = 0xBFC00000;
+    { "Reset Fault", 0xBFC00000};
 #else
-FaultVect ResetFault::_vect = 0x001;
+    { "Reset Fault", 0x001};
 #endif
-FaultStat ResetFault::_count;
-
-FaultName AddressErrorFault::_name = "Address Error";
-FaultVect AddressErrorFault::_vect = 0x0180;
-FaultStat AddressErrorFault::_count;
 
-FaultName StoreAddressErrorFault::_name = "Store Address Error";
-FaultVect StoreAddressErrorFault::_vect = 0x0180;
-FaultStat StoreAddressErrorFault::_count;
+template <> FaultVals MipsFault<AddressErrorFault>::vals =
+    { "Address Error", 0x0180 };
 
+template <> FaultVals MipsFault<StoreAddressErrorFault>::vals =
+    { "Store Address Error", 0x0180 };
 
-FaultName SystemCallFault::_name = "Syscall";
-FaultVect SystemCallFault::_vect = 0x0180;
-FaultStat SystemCallFault::_count;
+template <> FaultVals MipsFault<SystemCallFault>::vals =
+    { "Syscall", 0x0180 };
 
-FaultName CoprocessorUnusableFault::_name = "Coprocessor Unusable Fault";
-FaultVect CoprocessorUnusableFault::_vect = 0x180;
-FaultStat CoprocessorUnusableFault::_count;
+template <> FaultVals MipsFault<CoprocessorUnusableFault>::vals =
+    { "Coprocessor Unusable Fault", 0x180 };
 
-FaultName ReservedInstructionFault::_name = "Reserved Instruction Fault";
-FaultVect ReservedInstructionFault::_vect = 0x0180;
-FaultStat ReservedInstructionFault::_count;
+template <> FaultVals MipsFault<ReservedInstructionFault>::vals =
+    { "Reserved Instruction Fault", 0x0180 };
 
-FaultName ThreadFault::_name = "Thread Fault";
-FaultVect ThreadFault::_vect = 0x00F1;
-FaultStat ThreadFault::_count;
+template <> FaultVals MipsFault<ThreadFault>::vals =
+    { "Thread Fault", 0x00F1 };
 
-FaultName ArithmeticFault::_name = "Arithmetic Overflow Exception";
-FaultVect ArithmeticFault::_vect = 0x180;
-FaultStat ArithmeticFault::_count;
+template <> FaultVals MipsFault<ArithmeticFault>::vals =
+    { "Arithmetic Overflow Exception", 0x180 };
 
-FaultName UnimplementedOpcodeFault::_name = "opdec";
-FaultVect UnimplementedOpcodeFault::_vect = 0x0481;
-FaultStat UnimplementedOpcodeFault::_count;
+template <> FaultVals MipsFault<UnimplementedOpcodeFault>::vals =
+    { "opdec", 0x0481 };
 
-FaultName InterruptFault::_name = "interrupt";
-FaultVect InterruptFault::_vect = 0x0180;
-FaultStat InterruptFault::_count;
+template <> FaultVals MipsFault<InterruptFault>::vals =
+    { "interrupt", 0x0180 };
 
-FaultName TrapFault::_name = "Trap";
-FaultVect TrapFault::_vect = 0x0180;
-FaultStat TrapFault::_count;
+template <> FaultVals MipsFault<TrapFault>::vals =
+    { "Trap", 0x0180 };
 
-FaultName BreakpointFault::_name = "Breakpoint";
-FaultVect BreakpointFault::_vect = 0x0180;
-FaultStat BreakpointFault::_count;
+template <> FaultVals MipsFault<BreakpointFault>::vals =
+    { "Breakpoint", 0x0180 };
 
-FaultName ItbInvalidFault::_name = "Invalid TLB Entry Exception (I-Fetch/LW)";
-FaultVect ItbInvalidFault::_vect = 0x0180;
-FaultStat ItbInvalidFault::_count;
+template <> FaultVals MipsFault<ItbInvalidFault>::vals =
+    { "Invalid TLB Entry Exception (I-Fetch/LW)", 0x0180 };
 
-FaultName ItbPageFault::_name = "itbmiss";
-FaultVect ItbPageFault::_vect = 0x0181;
-FaultStat ItbPageFault::_count;
+template <> FaultVals MipsFault<ItbPageFault>::vals =
+    { "itbmiss", 0x0181 };
 
-FaultName ItbMissFault::_name = "itbmiss";
-FaultVect ItbMissFault::_vect = 0x0181;
-FaultStat ItbMissFault::_count;
+template <> FaultVals MipsFault<ItbMissFault>::vals =
+    { "itbmiss", 0x0181 };
 
-FaultName ItbAcvFault::_name = "iaccvio";
-FaultVect ItbAcvFault::_vect = 0x0081;
-FaultStat ItbAcvFault::_count;
+template <> FaultVals MipsFault<ItbAcvFault>::vals =
+    { "iaccvio", 0x0081 };
 
-FaultName ItbRefillFault::_name = "TLB Refill Exception (I-Fetch/LW)";
-FaultVect ItbRefillFault::_vect = 0x0180;
-FaultStat ItbRefillFault::_count;
+template <> FaultVals MipsFault<ItbRefillFault>::vals =
+    { "TLB Refill Exception (I-Fetch/LW)", 0x0180 };
 
-FaultName NDtbMissFault::_name = "dtb_miss_single";
-FaultVect NDtbMissFault::_vect = 0x0201;
-FaultStat NDtbMissFault::_count;
+template <> FaultVals MipsFault<NDtbMissFault>::vals =
+    { "dtb_miss_single", 0x0201 };
 
-FaultName PDtbMissFault::_name = "dtb_miss_double";
-FaultVect PDtbMissFault::_vect = 0x0281;
-FaultStat PDtbMissFault::_count;
+template <> FaultVals MipsFault<PDtbMissFault>::vals =
+    { "dtb_miss_double", 0x0281 };
 
-FaultName DtbPageFault::_name = "dfault";
-FaultVect DtbPageFault::_vect = 0x0381;
-FaultStat DtbPageFault::_count;
+template <> FaultVals MipsFault<DtbPageFault>::vals =
+    { "dfault", 0x0381 };
 
-FaultName DtbAcvFault::_name = "dfault";
-FaultVect DtbAcvFault::_vect = 0x0381;
-FaultStat DtbAcvFault::_count;
+template <> FaultVals MipsFault<DtbAcvFault>::vals =
+    { "dfault", 0x0381 };
 
-FaultName DtbInvalidFault::_name = "Invalid TLB Entry Exception (Store)";
-FaultVect DtbInvalidFault::_vect = 0x0180;
-FaultStat DtbInvalidFault::_count;
+template <> FaultVals MipsFault<DtbInvalidFault>::vals =
+    { "Invalid TLB Entry Exception (Store)", 0x0180 };
 
-FaultName DtbRefillFault::_name = "TLB Refill Exception (Store)";
-FaultVect DtbRefillFault::_vect = 0x0180;
-FaultStat DtbRefillFault::_count;
+template <> FaultVals MipsFault<DtbRefillFault>::vals =
+    { "TLB Refill Exception (Store)", 0x0180 };
 
-FaultName TLBModifiedFault::_name = "TLB Modified Exception";
-FaultVect TLBModifiedFault::_vect = 0x0180;
-FaultStat TLBModifiedFault::_count;
+template <> FaultVals MipsFault<TLBModifiedFault>::vals =
+    { "TLB Modified Exception", 0x0180 };
 
-FaultName FloatEnableFault::_name = "float_enable_fault";
-FaultVect FloatEnableFault::_vect = 0x0581;
-FaultStat FloatEnableFault::_count;
+template <> FaultVals MipsFault<FloatEnableFault>::vals =
+    { "float_enable_fault", 0x0581 };
 
-FaultName IntegerOverflowFault::_name = "Integer Overflow Fault";
-FaultVect IntegerOverflowFault::_vect = 0x0501;
-FaultStat IntegerOverflowFault::_count;
+template <> FaultVals MipsFault<IntegerOverflowFault>::vals =
+    { "Integer Overflow Fault", 0x0501 };
 
-FaultName DspStateDisabledFault::_name = "DSP Disabled Fault";
-FaultVect DspStateDisabledFault::_vect = 0x001a;
-FaultStat DspStateDisabledFault::_count;
+template <> FaultVals MipsFault<DspStateDisabledFault>::vals =
+    { "DSP Disabled Fault", 0x001a };
 
 #if FULL_SYSTEM
 void
-MipsFault::setHandlerPC(Addr HandlerBase, ThreadContext *tc)
+MipsFaultBase::setHandlerPC(Addr HandlerBase, ThreadContext *tc)
 {
     tc->setPC(HandlerBase);
     tc->setNextPC(HandlerBase + sizeof(MachInst));
@@ -177,7 +149,7 @@ MipsFault::setHandlerPC(Addr HandlerBase, ThreadContext *tc)
 }
 
 void
-MipsFault::setExceptionState(ThreadContext *tc, uint8_t excCode)
+MipsFaultBase::setExceptionState(ThreadContext *tc, uint8_t excCode)
 {
     // modify SRS Ctl - Save CSS, put ESS into CSS
     StatusReg status = tc->readMiscReg(MISCREG_STATUS);
diff --git a/src/arch/mips/faults.hh b/src/arch/mips/faults.hh
index 8b7c22ec4..049140229 100644
--- a/src/arch/mips/faults.hh
+++ b/src/arch/mips/faults.hh
@@ -41,12 +41,19 @@ namespace MipsISA
 
 typedef const Addr FaultVect;
 
-class MipsFault : public FaultBase
+class MipsFaultBase : public FaultBase
 {
   protected:
     virtual bool skipFaultingInstruction() {return false;}
     virtual bool setRestartAddress() {return true;}
   public:
+    struct FaultVals
+    {
+        const FaultName name;
+        const FaultVect vect;
+        FaultStat count;
+    };
+
     Addr badVAddr;
     Addr entryHiAsid;
     Addr entryHiVPN2;
@@ -59,59 +66,40 @@ class MipsFault : public FaultBase
     void setExceptionState(ThreadContext *, uint8_t);
     void setHandlerPC(Addr, ThreadContext *);
 #endif
-    virtual FaultVect vect() = 0;
-    virtual FaultStat & countStat() = 0;
 };
 
-class MachineCheckFault : public MipsFault
+template <typename T>
+class MipsFault : public MipsFaultBase
+{
+  protected:
+    static FaultVals vals;
+  public:
+    FaultName name() const { return vals.name; }
+    FaultVect vect() const { return vals.vect; }
+    FaultStat & countStat() { return vals.count; }
+};
+
+class MachineCheckFault : public MipsFault<MachineCheckFault>
 {
-  private:
-    static FaultName _name;
-    static FaultVect _vect;
-    static FaultStat _count;
   public:
-    FaultName name() const {return _name;}
-    FaultVect vect() {return _vect;}
-    FaultStat & countStat() {return _count;}
     bool isMachineCheckFault() {return true;}
 };
 
-class NonMaskableInterrupt : public MipsFault
+class NonMaskableInterrupt : public MipsFault<NonMaskableInterrupt>
 {
-  private:
-    static FaultName _name;
-    static FaultVect _vect;
-    static FaultStat _count;
   public:
-    FaultName name() const {return _name;}
-    FaultVect vect() {return _vect;}
-    FaultStat & countStat() {return _count;}
     bool isNonMaskableInterrupt() {return true;}
 };
 
-class AlignmentFault : public MipsFault
+class AlignmentFault : public MipsFault<AlignmentFault>
 {
-  private:
-    static FaultName _name;
-    static FaultVect _vect;
-    static FaultStat _count;
   public:
-    FaultName name() const {return _name;}
-    FaultVect vect() {return _vect;}
-    FaultStat & countStat() {return _count;}
     bool isAlignmentFault() {return true;}
 };
 
-class AddressErrorFault : public MipsFault
+class AddressErrorFault : public MipsFault<AddressErrorFault>
 {
-  private:
-    static FaultName _name;
-    static FaultVect _vect;
-    static FaultStat _count;
   public:
-    FaultName name() const {return _name;}
-    FaultVect vect() {return _vect;}
-    FaultStat & countStat() {return _count;}
 #if FULL_SYSTEM
     void invoke(ThreadContext * tc,
             StaticInstPtr inst = StaticInst::nullStaticInstPtr);
@@ -119,113 +107,35 @@ class AddressErrorFault : public MipsFault
 
 };
 
-class StoreAddressErrorFault : public MipsFault
+class StoreAddressErrorFault : public MipsFault<StoreAddressErrorFault>
 {
-  private:
-    static FaultName _name;
-    static FaultVect _vect;
-    static FaultStat _count;
   public:
-    FaultName name() const {return _name;}
-    FaultVect vect() {return _vect;}
-    FaultStat & countStat() {return _count;}
 #if FULL_SYSTEM
     void invoke(ThreadContext * tc,
             StaticInstPtr inst = StaticInst::nullStaticInstPtr);
 #endif
 };
 
-class UnimplementedOpcodeFault : public MipsFault
-{
-  private:
-    static FaultName _name;
-    static FaultVect _vect;
-    static FaultStat _count;
-  public:
-    FaultName name() const {return _name;}
-    FaultVect vect() {return _vect;}
-    FaultStat & countStat() {return _count;}
-};
+class UnimplementedOpcodeFault : public MipsFault<UnimplementedOpcodeFault> {};
 
-
-class TLBRefillIFetchFault : public MipsFault
+class TLBRefillIFetchFault : public MipsFault<TLBRefillIFetchFault>
 {
-  private:
-    Addr vaddr;
-    static FaultName _name;
-    static FaultVect _vect;
-    static FaultStat _count;
   public:
-    FaultName name() const {return _name;}
-    FaultVect vect() {return _vect;}
-    FaultStat & countStat() {return _count;}
     void invoke(ThreadContext * tc,
             StaticInstPtr inst = StaticInst::nullStaticInstPtr);
 };
 
-class TLBInvalidIFetchFault : public MipsFault
+class TLBInvalidIFetchFault : public MipsFault<TLBInvalidIFetchFault>
 {
-  private:
-    Addr vaddr;
-    static FaultName _name;
-    static FaultVect _vect;
-    static FaultStat _count;
   public:
-    FaultName name() const {return _name;}
-    FaultVect vect() {return _vect;}
-    FaultStat & countStat() {return _count;}
     void invoke(ThreadContext * tc,
             StaticInstPtr inst = StaticInst::nullStaticInstPtr);
 };
 
-class NDtbMissFault : public MipsFault
-{
-  private:
-    static FaultName _name;
-    static FaultVect _vect;
-    static FaultStat _count;
-  public:
-    FaultName name() const {return _name;}
-    FaultVect vect() {return _vect;}
-    FaultStat & countStat() {return _count;}
-};
-
-class PDtbMissFault : public MipsFault
-{
-  private:
-    static FaultName _name;
-    static FaultVect _vect;
-    static FaultStat _count;
-  public:
-    FaultName name() const {return _name;}
-    FaultVect vect() {return _vect;}
-    FaultStat & countStat() {return _count;}
-};
-
-class DtbPageFault : public MipsFault
-{
-  private:
-    static FaultName _name;
-    static FaultVect _vect;
-    static FaultStat _count;
-  public:
-    FaultName name() const {return _name;}
-    FaultVect vect() {return _vect;}
-    FaultStat & countStat() {return _count;}
-};
-
-class DtbAcvFault : public MipsFault
-{
-  private:
-    static FaultName _name;
-    static FaultVect _vect;
-    static FaultStat _count;
-  public:
-    FaultName name() const {return _name;}
-    FaultVect vect() {return _vect;}
-    FaultStat & countStat() {return _count;}
-};
-
+class NDtbMissFault : public MipsFault<NDtbMissFault> {};
+class PDtbMissFault : public MipsFault<PDtbMissFault> {};
+class DtbPageFault : public MipsFault<DtbPageFault> {};
+class DtbAcvFault : public MipsFault<DtbAcvFault> {};
 
 static inline Fault genMachineCheckFault()
 {
@@ -237,346 +147,172 @@ static inline Fault genAlignmentFault()
     return new AlignmentFault;
 }
 
-class ResetFault : public MipsFault
+class ResetFault : public MipsFault<ResetFault>
 {
-  private:
-    static FaultName _name;
-    static FaultVect _vect;
-    static FaultStat _count;
   public:
-    FaultName name() const {return _name;}
-    FaultVect vect() {return _vect;}
-    FaultStat & countStat() {return _count;}
     void invoke(ThreadContext * tc,
             StaticInstPtr inst = StaticInst::nullStaticInstPtr);
 
 };
 
-class SystemCallFault : public MipsFault
+class SystemCallFault : public MipsFault<SystemCallFault>
 {
-  private:
-    static FaultName _name;
-    static FaultVect _vect;
-    static FaultStat _count;
   public:
-    FaultName name() const {return _name;}
-    FaultVect vect() {return _vect;}
-    FaultStat & countStat() {return _count;}
 #if FULL_SYSTEM
     void invoke(ThreadContext * tc,
             StaticInstPtr inst = StaticInst::nullStaticInstPtr);
 #endif
 };
 
-class SoftResetFault : public MipsFault
+class SoftResetFault : public MipsFault<SoftResetFault>
 {
-  private:
-    static FaultName _name;
-    static FaultVect _vect;
-    static FaultStat _count;
   public:
-    FaultName name() const {return _name;}
-    FaultVect vect() {return _vect;}
-    FaultStat & countStat() {return _count;}
     void invoke(ThreadContext * tc,
             StaticInstPtr inst = StaticInst::nullStaticInstPtr);
 };
 
-class DebugSingleStep : public MipsFault
+class DebugSingleStep : public MipsFault<DebugSingleStep>
 {
-  private:
-    static FaultName _name;
-    static FaultVect _vect;
-    static FaultStat _count;
   public:
-    FaultName name() const {return _name;}
-    FaultVect vect() {return _vect;}
-    FaultStat & countStat() {return _count;}
     void invoke(ThreadContext * tc,
             StaticInstPtr inst = StaticInst::nullStaticInstPtr);
 };
 
-class DebugInterrupt : public MipsFault
+class DebugInterrupt : public MipsFault<DebugInterrupt>
 {
-  private:
-    static FaultName _name;
-    static FaultVect _vect;
-    static FaultStat _count;
   public:
-    FaultName name() const {return _name;}
-    FaultVect vect() {return _vect;}
-    FaultStat & countStat() {return _count;}
     void invoke(ThreadContext * tc,
             StaticInstPtr inst = StaticInst::nullStaticInstPtr);
 };
 
-class CoprocessorUnusableFault : public MipsFault
+class CoprocessorUnusableFault : public MipsFault<CoprocessorUnusableFault>
 {
-  private:
-    static FaultName _name;
-    static FaultVect _vect;
-    static FaultStat _count;
+  protected:
     int coProcID;
   public:
-    FaultName name() const {return _name;}
-    FaultVect vect() {return _vect;}
-    FaultStat & countStat() {return _count;}
+    CoprocessorUnusableFault(int _procid) : coProcID(_procid)
+    {}
+
     void invoke(ThreadContext * tc,
             StaticInstPtr inst = StaticInst::nullStaticInstPtr);
-    CoprocessorUnusableFault(int _procid){ coProcID = _procid;}
 };
 
-class ReservedInstructionFault : public MipsFault
+class ReservedInstructionFault : public MipsFault<ReservedInstructionFault>
 {
-  private:
-    static FaultName _name;
-    static FaultVect _vect;
-    static FaultStat _count;
   public:
-    FaultName name() const {return _name;}
-    FaultVect vect() {return _vect;}
-    FaultStat & countStat() {return _count;}
     void invoke(ThreadContext * tc,
             StaticInstPtr inst = StaticInst::nullStaticInstPtr);
 };
 
-class ThreadFault : public MipsFault
+class ThreadFault : public MipsFault<ThreadFault>
 {
-  private:
-    static FaultName _name;
-    static FaultVect _vect;
-    static FaultStat _count;
   public:
-    FaultName name() const {return _name;}
-    FaultVect vect() {return _vect;}
-    FaultStat & countStat() {return _count;}
     void invoke(ThreadContext * tc,
             StaticInstPtr inst = StaticInst::nullStaticInstPtr);
 };
 
-class ArithmeticFault : public MipsFault
+class ArithmeticFault : public MipsFault<ArithmeticFault>
 {
   protected:
     bool skipFaultingInstruction() {return true;}
-  private:
-    static FaultName _name;
-    static FaultVect _vect;
-    static FaultStat _count;
   public:
-    FaultName name() const {return _name;}
-    FaultVect vect() {return _vect;}
-    FaultStat & countStat() {return _count;}
 #if FULL_SYSTEM
     void invoke(ThreadContext * tc,
             StaticInstPtr inst = StaticInst::nullStaticInstPtr);
 #endif
 };
 
-class InterruptFault : public MipsFault
+class InterruptFault : public MipsFault<InterruptFault>
 {
   protected:
     bool setRestartAddress() {return false;}
-  private:
-    static FaultName _name;
-    static FaultVect _vect;
-    static FaultStat _count;
   public:
-    FaultName name() const {return _name;}
-    FaultVect vect() {return _vect;}
-    FaultStat & countStat() {return _count;}
-
 #if FULL_SYSTEM
     void invoke(ThreadContext * tc,
             StaticInstPtr inst = StaticInst::nullStaticInstPtr);
 #endif
 };
 
-class TrapFault : public MipsFault
+class TrapFault : public MipsFault<TrapFault>
 {
-  private:
-    static FaultName _name;
-    static FaultVect _vect;
-    static FaultStat _count;
   public:
-    FaultName name() const {return _name;}
-    FaultVect vect() {return _vect;}
-    FaultStat & countStat() {return _count;}
 #if FULL_SYSTEM
     void invoke(ThreadContext * tc,
             StaticInstPtr inst = StaticInst::nullStaticInstPtr);
 #endif
 };
 
-class BreakpointFault : public MipsFault
+class BreakpointFault : public MipsFault<BreakpointFault>
 {
-  private:
-    static FaultName _name;
-    static FaultVect _vect;
-    static FaultStat _count;
   public:
-    FaultName name() const {return _name;}
-    FaultVect vect() {return _vect;}
-    FaultStat & countStat() {return _count;}
 #if FULL_SYSTEM
     void invoke(ThreadContext * tc,
             StaticInstPtr inst = StaticInst::nullStaticInstPtr);
 #endif
 };
 
-class ItbRefillFault : public MipsFault
+class ItbRefillFault : public MipsFault<ItbRefillFault>
 {
-  private:
-    static FaultName _name;
-    static FaultVect _vect;
-    static FaultStat _count;
   public:
-    FaultName name() const {return _name;}
-    FaultVect vect() {return _vect;}
-    FaultStat & countStat() {return _count;}
 #if FULL_SYSTEM
     void invoke(ThreadContext * tc,
             StaticInstPtr inst = StaticInst::nullStaticInstPtr);
 #endif
 };
 
-class DtbRefillFault : public MipsFault
+class DtbRefillFault : public MipsFault<DtbRefillFault>
 {
-  private:
-    static FaultName _name;
-    static FaultVect _vect;
-    static FaultStat _count;
   public:
-    FaultName name() const {return _name;}
-    FaultVect vect() {return _vect;}
-    FaultStat & countStat() {return _count;}
 #if FULL_SYSTEM
     void invoke(ThreadContext * tc,
             StaticInstPtr inst = StaticInst::nullStaticInstPtr);
 #endif
 };
 
-class ItbPageFault : public MipsFault
+class ItbPageFault : public MipsFault<ItbPageFault>
 {
-  private:
-    static FaultName _name;
-    static FaultVect _vect;
-    static FaultStat _count;
   public:
-    FaultName name() const {return _name;}
-    FaultVect vect() {return _vect;}
-    FaultStat & countStat() {return _count;}
 #if FULL_SYSTEM
     void invoke(ThreadContext * tc,
             StaticInstPtr inst = StaticInst::nullStaticInstPtr);
 #endif
 };
 
-class ItbInvalidFault : public MipsFault
+class ItbInvalidFault : public MipsFault<ItbInvalidFault>
 {
-  private:
-    static FaultName _name;
-    static FaultVect _vect;
-    static FaultStat _count;
   public:
-    FaultName name() const {return _name;}
-    FaultVect vect() {return _vect;}
-    FaultStat & countStat() {return _count;}
 #if FULL_SYSTEM
     void invoke(ThreadContext * tc,
             StaticInstPtr inst = StaticInst::nullStaticInstPtr);
 #endif
 };
 
-class TLBModifiedFault : public MipsFault
+class TLBModifiedFault : public MipsFault<TLBModifiedFault>
 {
-  private:
-    static FaultName _name;
-    static FaultVect _vect;
-    static FaultStat _count;
   public:
-    FaultName name() const {return _name;}
-    FaultVect vect() {return _vect;}
-    FaultStat & countStat() {return _count;}
 #if FULL_SYSTEM
     void invoke(ThreadContext * tc,
             StaticInstPtr inst = StaticInst::nullStaticInstPtr);
 #endif
 };
 
-class DtbInvalidFault : public MipsFault
+class DtbInvalidFault : public MipsFault<DtbInvalidFault>
 {
-  private:
-    static FaultName _name;
-    static FaultVect _vect;
-    static FaultStat _count;
   public:
-    FaultName name() const {return _name;}
-    FaultVect vect() {return _vect;}
-    FaultStat & countStat() {return _count;}
 #if FULL_SYSTEM
     void invoke(ThreadContext * tc,
             StaticInst::StaticInstPtr inst = nullStaticInstPtr);
 #endif
 };
 
-class FloatEnableFault : public MipsFault
-{
-  private:
-    static FaultName _name;
-    static FaultVect _vect;
-    static FaultStat _count;
-  public:
-    FaultName name() const {return _name;}
-    FaultVect vect() {return _vect;}
-    FaultStat & countStat() {return _count;}
-};
-
-class ItbMissFault : public MipsFault
-{
-  private:
-    static FaultName _name;
-    static FaultVect _vect;
-    static FaultStat _count;
-  public:
-    FaultName name() const {return _name;}
-    FaultVect vect() {return _vect;}
-    FaultStat & countStat() {return _count;}
-};
-
-class ItbAcvFault : public MipsFault
-{
-  private:
-    static FaultName _name;
-    static FaultVect _vect;
-    static FaultStat _count;
-  public:
-    FaultName name() const {return _name;}
-    FaultVect vect() {return _vect;}
-    FaultStat & countStat() {return _count;}
-};
-
-class IntegerOverflowFault : public MipsFault
-{
-  private:
-    static FaultName _name;
-    static FaultVect _vect;
-    static FaultStat _count;
-  public:
-    FaultName name() const {return _name;}
-    FaultVect vect() {return _vect;}
-    FaultStat & countStat() {return _count;}
-};
+class FloatEnableFault : public MipsFault<FloatEnableFault> {};
+class ItbMissFault : public MipsFault<ItbMissFault> {};
+class ItbAcvFault : public MipsFault<ItbAcvFault> {};
+class IntegerOverflowFault : public MipsFault<IntegerOverflowFault> {};
 
-class DspStateDisabledFault : public MipsFault
+class DspStateDisabledFault : public MipsFault<DspStateDisabledFault>
 {
-  private:
-    static FaultName _name;
-    static FaultVect _vect;
-    static FaultStat _count;
   public:
-    FaultName name() const {return _name;}
-    FaultVect vect() {return _vect;}
-    FaultStat & countStat() {return _count;}
     void invoke(ThreadContext * tc,
             StaticInstPtr inst = StaticInst::nullStaticInstPtr);
 };
-- 
2.30.2