From a56c651980921d210f2c48f84ce5d3445fc38475 Mon Sep 17 00:00:00 2001
From: Gabe Black <gblack@eecs.umich.edu>
Date: Tue, 2 Oct 2007 22:21:38 -0700
Subject: [PATCH] Predecoder: Clear out predecoder state on an ITLB fault.

--HG--
extra : convert_revision : 68f8ff778dbd28ade5070edf5a7d662e7bf0045a
---
 src/arch/alpha/predecoder.hh | 3 +++
 src/arch/mips/predecoder.hh  | 3 +++
 src/arch/sparc/predecoder.hh | 3 +++
 src/arch/x86/predecoder.cc   | 4 ++--
 src/arch/x86/predecoder.hh   | 7 ++++++-
 src/cpu/simple/base.cc       | 1 +
 6 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/src/arch/alpha/predecoder.hh b/src/arch/alpha/predecoder.hh
index 4887de856..7a6bb3c02 100644
--- a/src/arch/alpha/predecoder.hh
+++ b/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)
diff --git a/src/arch/mips/predecoder.hh b/src/arch/mips/predecoder.hh
index e310dded4..17da15f3f 100644
--- a/src/arch/mips/predecoder.hh
+++ b/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)
diff --git a/src/arch/sparc/predecoder.hh b/src/arch/sparc/predecoder.hh
index d990c3256..13ce5c1b6 100644
--- a/src/arch/sparc/predecoder.hh
+++ b/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)
diff --git a/src/arch/x86/predecoder.cc b/src/arch/x86/predecoder.cc
index 7f8bc7abc..62899e65a 100644
--- a/src/arch/x86/predecoder.cc
+++ b/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);
diff --git a/src/arch/x86/predecoder.hh b/src/arch/x86/predecoder.hh
index 450ebd79b..6e41e8134 100644
--- a/src/arch/x86/predecoder.hh
+++ b/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;
diff --git a/src/cpu/simple/base.cc b/src/cpu/simple/base.cc
index 9fc1d1dd9..f3b34880e 100644
--- a/src/cpu/simple/base.cc
+++ b/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);
-- 
2.30.2