Some clean up work with faults.

arch/alpha/faults.cc:
    Renamed the _stat stat to a more descriptive _count, got rid of some old commented out code, and moved common fault handling code, ie recording that the fault happend and that it wasn't mispeculated, into the FaultBase class.
arch/alpha/faults.hh:
    Renamed the _stat stat to the more descriptive _count, and renamed the appropriate accessor functions.
kern/kernel_stats.cc:
kern/kernel_stats.hh:
    The fault statistics are now handled by the fault classes themselves.
sim/faults.cc:
    The default implementation of the "invoke" method now does what all faults should do first, ie record that the fault happened, and make sure the fault isn't being executed on a mispeculated execution path.
sim/faults.hh:
    There is now a default implementation of invoke, and the stat function is taken care of in the architecture specific fault classes.

--HG--
extra : convert_revision : f6656fbea991df9addf85cad740ac37b1036b71a

2 files changed, 53 insertions, 88 deletions

diff --git a/arch/alpha/faults.cc b/arch/alpha/faults.cc
index 0a836363c..c840b6842 100644
--- a/arch/alpha/faults.cc
+++ b/arch/alpha/faults.cc
@@ -30,84 +30,80 @@
 #include "cpu/exec_context.hh"
 #include "cpu/base.hh"
 #include "base/trace.hh"
-#include "kern/kernel_stats.hh"
 
 namespace AlphaISA
 {
 
 FaultName MachineCheckFault::_name = "mchk";
 FaultVect MachineCheckFault::_vect = 0x0401;
-FaultStat MachineCheckFault::_stat;
+FaultStat MachineCheckFault::_count;
 
 FaultName AlignmentFault::_name = "unalign";
 FaultVect AlignmentFault::_vect = 0x0301;
-FaultStat AlignmentFault::_stat;
+FaultStat AlignmentFault::_count;
 
 FaultName ResetFault::_name = "reset";
 FaultVect ResetFault::_vect = 0x0001;
-FaultStat ResetFault::_stat;
+FaultStat ResetFault::_count;
 
 FaultName ArithmeticFault::_name = "arith";
 FaultVect ArithmeticFault::_vect = 0x0501;
-FaultStat ArithmeticFault::_stat;
+FaultStat ArithmeticFault::_count;
 
 FaultName InterruptFault::_name = "interrupt";
 FaultVect InterruptFault::_vect = 0x0101;
-FaultStat InterruptFault::_stat;
+FaultStat InterruptFault::_count;
 
 FaultName NDtbMissFault::_name = "dtb_miss_single";
 FaultVect NDtbMissFault::_vect = 0x0201;
-FaultStat NDtbMissFault::_stat;
+FaultStat NDtbMissFault::_count;
 
 FaultName PDtbMissFault::_name = "dtb_miss_double";
 FaultVect PDtbMissFault::_vect = 0x0281;
-FaultStat PDtbMissFault::_stat;
+FaultStat PDtbMissFault::_count;
 
 FaultName DtbPageFault::_name = "dfault";
 FaultVect DtbPageFault::_vect = 0x0381;
-FaultStat DtbPageFault::_stat;
+FaultStat DtbPageFault::_count;
 
 FaultName DtbAcvFault::_name = "dfault";
 FaultVect DtbAcvFault::_vect = 0x0381;
-FaultStat DtbAcvFault::_stat;
+FaultStat DtbAcvFault::_count;
 
 FaultName ItbMissFault::_name = "itbmiss";
 FaultVect ItbMissFault::_vect = 0x0181;
-FaultStat ItbMissFault::_stat;
+FaultStat ItbMissFault::_count;
 
 FaultName ItbPageFault::_name = "itbmiss";
 FaultVect ItbPageFault::_vect = 0x0181;
-FaultStat ItbPageFault::_stat;
+FaultStat ItbPageFault::_count;
 
 FaultName ItbAcvFault::_name = "iaccvio";
 FaultVect ItbAcvFault::_vect = 0x0081;
-FaultStat ItbAcvFault::_stat;
+FaultStat ItbAcvFault::_count;
 
 FaultName UnimplementedOpcodeFault::_name = "opdec";
 FaultVect UnimplementedOpcodeFault::_vect = 0x0481;
-FaultStat UnimplementedOpcodeFault::_stat;
+FaultStat UnimplementedOpcodeFault::_count;
 
 FaultName FloatEnableFault::_name = "fen";
 FaultVect FloatEnableFault::_vect = 0x0581;
-FaultStat FloatEnableFault::_stat;
+FaultStat FloatEnableFault::_count;
 
 FaultName PalFault::_name = "pal";
 FaultVect PalFault::_vect = 0x2001;
-FaultStat PalFault::_stat;
+FaultStat PalFault::_count;
 
 FaultName IntegerOverflowFault::_name = "intover";
 FaultVect IntegerOverflowFault::_vect = 0x0501;
-FaultStat IntegerOverflowFault::_stat;
+FaultStat IntegerOverflowFault::_count;
 
 #if FULL_SYSTEM
 
 void AlphaFault::invoke(ExecContext * xc)
 {
-    DPRINTF(Fault, "Fault %s at PC: %#x\n", name(), xc->regs.pc);
-    xc->cpu->recordEvent(csprintf("Fault %s", name()));
-
-    assert(!xc->misspeculating());
-    xc->kernelStats->fault(this);
+    FaultBase::invoke(xc);
+    countStat()++;
 
     // exception restart address
     if (setRestartAddress() || !xc->inPalMode())
@@ -128,43 +124,11 @@ void AlphaFault::invoke(ExecContext * xc)
 
 void ArithmeticFault::invoke(ExecContext * xc)
 {
-    DPRINTF(Fault, "Fault %s at PC: %#x\n", name(), xc->regs.pc);
-    xc->cpu->recordEvent(csprintf("Fault %s", name()));
-
-    assert(!xc->misspeculating());
-    xc->kernelStats->fault(this);
-
+    FaultBase::invoke(xc);
     panic("Arithmetic traps are unimplemented!");
 }
 
-
-/*void ArithmeticFault::invoke(ExecContext * xc)
-{
-    panic("Arithmetic traps are unimplemented!");
-}*/
-
 #endif
 
 } // namespace AlphaISA
 
-/*Fault * ListOfFaults[] = {
-        (Fault *)&NoFault,
-        (Fault *)&ResetFault,
-        (Fault *)&MachineCheckFault,
-        (Fault *)&ArithmeticFault,
-        (Fault *)&InterruptFault,
-        (Fault *)&NDtbMissFault,
-        (Fault *)&PDtbMissFault,
-        (Fault *)&AlignmentFault,
-        (Fault *)&DtbPageFault,
-        (Fault *)&DtbAcvFault,
-        (Fault *)&ItbMissFault,
-        (Fault *)&ItbPageFault,
-        (Fault *)&ItbAcvFault,
-        (Fault *)&UnimplementedOpcodeFault,
-        (Fault *)&FloatEnableFault,
-        (Fault *)&PalFault,
-        (Fault *)&IntegerOverflowFault,
-        };
-
-int NumFaults = sizeof(ListOfFaults) / sizeof(Fault *);*/
diff --git a/arch/alpha/faults.hh b/arch/alpha/faults.hh
index c4a72e07c..1a196cc94 100644
--- a/arch/alpha/faults.hh
+++ b/arch/alpha/faults.hh
@@ -38,7 +38,7 @@ namespace AlphaISA
 
 typedef const Addr FaultVect;
 
-class AlphaFault : public virtual FaultBase
+class AlphaFault : public FaultBase
 {
   protected:
     virtual bool skipFaultingInstruction() {return false;}
@@ -48,6 +48,7 @@ class AlphaFault : public virtual FaultBase
     void invoke(ExecContext * xc);
 #endif
     virtual FaultVect vect() = 0;
+    virtual FaultStat & countStat() = 0;
 };
 
 class MachineCheckFault : public AlphaFault
@@ -55,11 +56,11 @@ class MachineCheckFault : public AlphaFault
   private:
     static FaultName _name;
     static FaultVect _vect;
-    static FaultStat _stat;
+    static FaultStat _count;
   public:
     FaultName name() {return _name;}
     FaultVect vect() {return _vect;}
-    FaultStat & stat() {return _stat;}
+    FaultStat & countStat() {return _count;}
     bool isMachineCheckFault() {return true;}
 };
 
@@ -68,11 +69,11 @@ class AlignmentFault : public AlphaFault
   private:
     static FaultName _name;
     static FaultVect _vect;
-    static FaultStat _stat;
+    static FaultStat _count;
   public:
     FaultName name() {return _name;}
     FaultVect vect() {return _vect;}
-    FaultStat & stat() {return _stat;}
+    FaultStat & countStat() {return _count;}
     bool isAlignmentFault() {return true;}
 };
 
@@ -91,11 +92,11 @@ class ResetFault : public AlphaFault
   private:
     static FaultName _name;
     static FaultVect _vect;
-    static FaultStat _stat;
+    static FaultStat _count;
   public:
     FaultName name() {return _name;}
     FaultVect vect() {return _vect;}
-    FaultStat & stat() {return _stat;}
+    FaultStat & countStat() {return _count;}
 };
 
 class ArithmeticFault : public AlphaFault
@@ -105,11 +106,11 @@ class ArithmeticFault : public AlphaFault
   private:
     static FaultName _name;
     static FaultVect _vect;
-    static FaultStat _stat;
+    static FaultStat _count;
   public:
     FaultName name() {return _name;}
     FaultVect vect() {return _vect;}
-    FaultStat & stat() {return _stat;}
+    FaultStat & countStat() {return _count;}
 #if FULL_SYSTEM
     void invoke(ExecContext * xc);
 #endif
@@ -122,11 +123,11 @@ class InterruptFault : public AlphaFault
   private:
     static FaultName _name;
     static FaultVect _vect;
-    static FaultStat _stat;
+    static FaultStat _count;
   public:
     FaultName name() {return _name;}
     FaultVect vect() {return _vect;}
-    FaultStat & stat() {return _stat;}
+    FaultStat & countStat() {return _count;}
 };
 
 class NDtbMissFault : public AlphaFault
@@ -134,11 +135,11 @@ class NDtbMissFault : public AlphaFault
   private:
     static FaultName _name;
     static FaultVect _vect;
-    static FaultStat _stat;
+    static FaultStat _count;
   public:
     FaultName name() {return _name;}
     FaultVect vect() {return _vect;}
-    FaultStat & stat() {return _stat;}
+    FaultStat & countStat() {return _count;}
 };
 
 class PDtbMissFault : public AlphaFault
@@ -146,11 +147,11 @@ class PDtbMissFault : public AlphaFault
   private:
     static FaultName _name;
     static FaultVect _vect;
-    static FaultStat _stat;
+    static FaultStat _count;
   public:
     FaultName name() {return _name;}
     FaultVect vect() {return _vect;}
-    FaultStat & stat() {return _stat;}
+    FaultStat & countStat() {return _count;}
 };
 
 class DtbPageFault : public AlphaFault
@@ -158,11 +159,11 @@ class DtbPageFault : public AlphaFault
   private:
     static FaultName _name;
     static FaultVect _vect;
-    static FaultStat _stat;
+    static FaultStat _count;
   public:
     FaultName name() {return _name;}
     FaultVect vect() {return _vect;}
-    FaultStat & stat() {return _stat;}
+    FaultStat & countStat() {return _count;}
 };
 
 class DtbAcvFault : public AlphaFault
@@ -170,11 +171,11 @@ class DtbAcvFault : public AlphaFault
   private:
     static FaultName _name;
     static FaultVect _vect;
-    static FaultStat _stat;
+    static FaultStat _count;
   public:
     FaultName name() {return _name;}
     FaultVect vect() {return _vect;}
-    FaultStat & stat() {return _stat;}
+    FaultStat & countStat() {return _count;}
 };
 
 class ItbMissFault : public AlphaFault
@@ -182,11 +183,11 @@ class ItbMissFault : public AlphaFault
   private:
     static FaultName _name;
     static FaultVect _vect;
-    static FaultStat _stat;
+    static FaultStat _count;
   public:
     FaultName name() {return _name;}
     FaultVect vect() {return _vect;}
-    FaultStat & stat() {return _stat;}
+    FaultStat & countStat() {return _count;}
 };
 
 class ItbPageFault : public AlphaFault
@@ -194,11 +195,11 @@ class ItbPageFault : public AlphaFault
   private:
     static FaultName _name;
     static FaultVect _vect;
-    static FaultStat _stat;
+    static FaultStat _count;
   public:
     FaultName name() {return _name;}
     FaultVect vect() {return _vect;}
-    FaultStat & stat() {return _stat;}
+    FaultStat & countStat() {return _count;}
 };
 
 class ItbAcvFault : public AlphaFault
@@ -206,11 +207,11 @@ class ItbAcvFault : public AlphaFault
   private:
     static FaultName _name;
     static FaultVect _vect;
-    static FaultStat _stat;
+    static FaultStat _count;
   public:
     FaultName name() {return _name;}
     FaultVect vect() {return _vect;}
-    FaultStat & stat() {return _stat;}
+    FaultStat & countStat() {return _count;}
 };
 
 class UnimplementedOpcodeFault : public AlphaFault
@@ -218,11 +219,11 @@ class UnimplementedOpcodeFault : public AlphaFault
   private:
     static FaultName _name;
     static FaultVect _vect;
-    static FaultStat _stat;
+    static FaultStat _count;
   public:
     FaultName name() {return _name;}
     FaultVect vect() {return _vect;}
-    FaultStat & stat() {return _stat;}
+    FaultStat & countStat() {return _count;}
 };
 
 class FloatEnableFault : public AlphaFault
@@ -230,11 +231,11 @@ class FloatEnableFault : public AlphaFault
   private:
     static FaultName _name;
     static FaultVect _vect;
-    static FaultStat _stat;
+    static FaultStat _count;
   public:
     FaultName name() {return _name;}
     FaultVect vect() {return _vect;}
-    FaultStat & stat() {return _stat;}
+    FaultStat & countStat() {return _count;}
 };
 
 class PalFault : public AlphaFault
@@ -244,11 +245,11 @@ class PalFault : public AlphaFault
   private:
     static FaultName _name;
     static FaultVect _vect;
-    static FaultStat _stat;
+    static FaultStat _count;
   public:
     FaultName name() {return _name;}
     FaultVect vect() {return _vect;}
-    FaultStat & stat() {return _stat;}
+    FaultStat & countStat() {return _count;}
 };
 
 class IntegerOverflowFault : public AlphaFault
@@ -256,11 +257,11 @@ class IntegerOverflowFault : public AlphaFault
   private:
     static FaultName _name;
     static FaultVect _vect;
-    static FaultStat _stat;
+    static FaultStat _count;
   public:
     FaultName name() {return _name;}
     FaultVect vect() {return _vect;}
-    FaultStat & stat() {return _stat;}
+    FaultStat & countStat() {return _count;}
 };
 
 } // AlphaISA namespace