Predecoder: Clear out predecoder state on an ITLB fault.

--HG--
extra : convert_revision : 68f8ff778dbd28ade5070edf5a7d662e7bf0045a

src/arch/alpha/predecoder.hh

@@ -65,6 +65,9 @@ namespace AlphaISA
         {
         }
 
+        void reset()
+        {}
+
         //Use this to give data to the predecoder. This should be used
         //when there is control flow.
         void moreBytes(Addr pc, Addr fetchPC, MachInst inst)

src/arch/mips/predecoder.hh

@@ -64,6 +64,9 @@ namespace MipsISA
         {
         }
 
+        void reset()
+        {}
+
         //Use this to give data to the predecoder. This should be used
         //when there is control flow.
         void moreBytes(Addr pc, Addr fetchPC, MachInst inst)

src/arch/sparc/predecoder.hh

@@ -65,6 +65,9 @@ namespace SparcISA
         {
         }
 
+        void reset()
+        {}
+
         //Use this to give data to the predecoder. This should be used
         //when there is control flow.
         void moreBytes(Addr pc, Addr fetchPC, MachInst inst)

src/arch/x86/predecoder.cc

@@ -62,7 +62,7 @@
 
 namespace X86ISA
 {
-    void Predecoder::reset()
+    void Predecoder::doReset()
     {
         origPC = basePC + offset;
         DPRINTF(Predecoder, "Setting origPC to %#x\n", origPC);
@@ -96,7 +96,7 @@ namespace X86ISA
             switch(state)
             {
               case ResetState:
-                reset();
+                doReset();
                 state = PrefixState;
               case PrefixState:
                 state = doPrefixState(nextByte);

src/arch/x86/predecoder.hh

@@ -134,7 +134,7 @@ namespace X86ISA
                 outOfBytes = true;
         }
 
-        void reset();
+        void doReset();
 
         //State machine state
       protected:
@@ -182,6 +182,11 @@ namespace X86ISA
             emi.mode.submode = SixtyFourBitMode;
         }
 
+        void reset()
+        {
+            state = ResetState;
+        }
+
         ThreadContext * getTC()
         {
             return tc;

src/cpu/simple/base.cc

@@ -463,6 +463,7 @@ BaseSimpleCPU::advancePC(Fault fault)
     fetchOffset = 0;
     if (fault != NoFault) {
         curMacroStaticInst = StaticInst::nullStaticInstPtr;
+        predecoder.reset();
         fault->invoke(tc);
         thread->setMicroPC(0);
         thread->setNextMicroPC(1);