Merge ktlim@zizzer:/bk/newmem

into  zamp.eecs.umich.edu:/z/ktlim2/clean/newmem

--HG--
extra : convert_revision : 3d951bbeee0178de47e1bdbe704808544bfe732e

3 files changed, 1372 insertions, 379 deletions

diff --git a/src/cpu/ozone/cpu.cc b/src/cpu/ozone/cpu.cc
index cbeca9d3b..d2ea0164c 100644
--- a/src/cpu/ozone/cpu.cc
+++ b/src/cpu/ozone/cpu.cc
@@ -26,8 +26,9 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#include "cpu/ooo_cpu/ooo_cpu_impl.hh"
-#include "cpu/ooo_cpu/ooo_dyn_inst.hh"
-#include "cpu/ooo_cpu/ooo_impl.hh"
+#include "cpu/ozone/cpu_impl.hh"
+#include "cpu/ozone/ozone_impl.hh"
+#include "cpu/ozone/simple_impl.hh"
 
-template class OoOCPU<OoOImpl>;
+template class OzoneCPU<SimpleImpl>;
+template class OzoneCPU<OzoneImpl>;
diff --git a/src/cpu/ozone/cpu.hh b/src/cpu/ozone/cpu.hh
index fa849bb09..5af2b02b2 100644
--- a/src/cpu/ozone/cpu.hh
+++ b/src/cpu/ozone/cpu.hh
@@ -26,15 +26,19 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef __CPU_OOO_CPU_OOO_CPU_HH__
-#define __CPU_OOO_CPU_OOO_CPU_HH__
+#ifndef __CPU_OZONE_CPU_HH__
+#define __CPU_OZONE_CPU_HH__
+
+#include <set>
 
 #include "base/statistics.hh"
+#include "base/timebuf.hh"
 #include "config/full_system.hh"
 #include "cpu/base.hh"
 #include "cpu/exec_context.hh"
-#include "encumbered/cpu/full/fu_pool.hh"
-#include "cpu/ooo_cpu/ea_list.hh"
+#include "cpu/inst_seq.hh"
+#include "cpu/ozone/rename_table.hh"
+#include "cpu/ozone/thread_state.hh"
 #include "cpu/pc_event.hh"
 #include "cpu/static_inst.hh"
 #include "mem/mem_interface.hh"
@@ -42,14 +46,21 @@
 
 // forward declarations
 #if FULL_SYSTEM
-class Processor;
+#include "arch/alpha/tlb.hh"
+
 class AlphaITB;
 class AlphaDTB;
 class PhysicalMemory;
+class MemoryController;
 
+class Sampler;
 class RemoteGDB;
 class GDBListener;
 
+namespace Kernel {
+    class Statistics;
+};
+
 #else
 
 class Process;
@@ -57,12 +68,16 @@ class Process;
 #endif // FULL_SYSTEM
 
 class Checkpoint;
+class EndQuiesceEvent;
 class MemInterface;
 
 namespace Trace {
     class InstRecord;
 }
 
+template <class>
+class Checker;
+
 /**
  * Declaration of Out-of-Order CPU class.  Basically it is a SimpleCPU with
  * simple out-of-order capabilities added to it.  It is still a 1 CPI machine
@@ -72,23 +87,177 @@ namespace Trace {
  */
 
 template <class Impl>
-class OoOCPU : public BaseCPU
+class OzoneCPU : public BaseCPU
 {
   private:
+    typedef typename Impl::FrontEnd FrontEnd;
+    typedef typename Impl::BackEnd BackEnd;
     typedef typename Impl::DynInst DynInst;
     typedef typename Impl::DynInstPtr DynInstPtr;
 
+    typedef TheISA::MiscReg MiscReg;
+
+  public:
+    class OzoneXC : public ExecContext {
+      public:
+        OzoneCPU<Impl> *cpu;
+
+        OzoneThreadState<Impl> *thread;
+
+        BaseCPU *getCpuPtr();
+
+        void setCpuId(int id);
+
+        int readCpuId() { return thread->cpuId; }
+
+        FunctionalMemory *getMemPtr() { return thread->mem; }
+
+#if FULL_SYSTEM
+        System *getSystemPtr() { return cpu->system; }
+
+        PhysicalMemory *getPhysMemPtr() { return cpu->physmem; }
+
+        AlphaITB *getITBPtr() { return cpu->itb; }
+
+        AlphaDTB * getDTBPtr() { return cpu->dtb; }
+
+        Kernel::Statistics *getKernelStats() { return thread->kernelStats; }
+#else
+        Process *getProcessPtr() { return thread->process; }
+#endif
+
+        Status status() const { return thread->_status; }
+
+        void setStatus(Status new_status);
+
+        /// Set the status to Active.  Optional delay indicates number of
+        /// cycles to wait before beginning execution.
+        void activate(int delay = 1);
+
+        /// Set the status to Suspended.
+        void suspend();
+
+        /// Set the status to Unallocated.
+        void deallocate();
+
+        /// Set the status to Halted.
+        void halt();
+
+#if FULL_SYSTEM
+        void dumpFuncProfile();
+#endif
+
+        void takeOverFrom(ExecContext *old_context);
+
+        void regStats(const std::string &name);
+
+        void serialize(std::ostream &os);
+        void unserialize(Checkpoint *cp, const std::string &section);
+
+#if FULL_SYSTEM
+        EndQuiesceEvent *getQuiesceEvent();
+
+        Tick readLastActivate();
+        Tick readLastSuspend();
+
+        void profileClear();
+        void profileSample();
+#endif
+
+        int getThreadNum();
+
+        // Also somewhat obnoxious.  Really only used for the TLB fault.
+        TheISA::MachInst getInst();
+
+        void copyArchRegs(ExecContext *xc);
+
+        void clearArchRegs();
+
+        uint64_t readIntReg(int reg_idx);
+
+        float readFloatRegSingle(int reg_idx);
+
+        double readFloatRegDouble(int reg_idx);
+
+        uint64_t readFloatRegInt(int reg_idx);
+
+        void setIntReg(int reg_idx, uint64_t val);
+
+        void setFloatRegSingle(int reg_idx, float val);
+
+        void setFloatRegDouble(int reg_idx, double val);
+
+        void setFloatRegInt(int reg_idx, uint64_t val);
+
+        uint64_t readPC() { return thread->PC; }
+        void setPC(Addr val);
+
+        uint64_t readNextPC() { return thread->nextPC; }
+        void setNextPC(Addr val);
+
+      public:
+        // ISA stuff:
+        MiscReg readMiscReg(int misc_reg);
+
+        MiscReg readMiscRegWithEffect(int misc_reg, Fault &fault);
+
+        Fault setMiscReg(int misc_reg, const MiscReg &val);
+
+        Fault setMiscRegWithEffect(int misc_reg, const MiscReg &val);
+
+        unsigned readStCondFailures()
+        { return thread->storeCondFailures; }
+
+        void setStCondFailures(unsigned sc_failures)
+        { thread->storeCondFailures = sc_failures; }
+
+#if FULL_SYSTEM
+        bool inPalMode() { return cpu->inPalMode(); }
+#endif
+
+        bool misspeculating() { return false; }
+
+#if !FULL_SYSTEM
+        TheISA::IntReg getSyscallArg(int i)
+        { return thread->renameTable[TheISA::ArgumentReg0 + i]->readIntResult(); }
+
+        // used to shift args for indirect syscall
+        void setSyscallArg(int i, TheISA::IntReg val)
+        { thread->renameTable[TheISA::ArgumentReg0 + i]->setIntResult(i); }
+
+        void setSyscallReturn(SyscallReturn return_value)
+        { cpu->setSyscallReturn(return_value, thread->tid); }
+
+        Counter readFuncExeInst() { return thread->funcExeInst; }
+
+        void setFuncExeInst(Counter new_val)
+        { thread->funcExeInst = new_val; }
+#endif
+    };
+
+    // execution context proxy
+    OzoneXC ozoneXC;
+    ExecContext *xcProxy;
+    ExecContext *checkerXC;
+
+    typedef OzoneThreadState<Impl> ImplState;
+
+  private:
+    OzoneThreadState<Impl> thread;
+
   public:
     // main simulation loop (one cycle)
     void tick();
 
+    std::set<InstSeqNum> snList;
+    std::set<Addr> lockAddrList;
   private:
     struct TickEvent : public Event
     {
-        OoOCPU *cpu;
+        OzoneCPU *cpu;
         int width;
 
-        TickEvent(OoOCPU *c, int w);
+        TickEvent(OzoneCPU *c, int w);
         void process();
         const char *description();
     };
@@ -99,9 +268,9 @@ class OoOCPU : public BaseCPU
     void scheduleTickEvent(int delay)
     {
         if (tickEvent.squashed())
-            tickEvent.reschedule(curTick + delay);
+            tickEvent.reschedule(curTick + cycles(delay));
         else if (!tickEvent.scheduled())
-            tickEvent.schedule(curTick + delay);
+            tickEvent.schedule(curTick + cycles(delay));
     }
 
     /// Unschedule tick event, regardless of its current state.
@@ -118,20 +287,17 @@ class OoOCPU : public BaseCPU
     void trace_data(T data);
 
   public:
-    //
     enum Status {
         Running,
         Idle,
-        IcacheMiss,
-        IcacheMissComplete,
-        DcacheMissStall,
         SwitchedOut
     };
 
-  private:
     Status _status;
 
   public:
+    bool checkInterrupts;
+
     void post_interrupt(int int_num, int index);
 
     void zero_fill_64(Addr addr) {
@@ -142,41 +308,45 @@ class OoOCPU : public BaseCPU
         }
     };
 
-    struct Params : public BaseCPU::Params
-    {
-        MemInterface *icache_interface;
-        MemInterface *dcache_interface;
-        int width;
-#if FULL_SYSTEM
-        AlphaITB *itb;
-        AlphaDTB *dtb;
-        FunctionalMemory *mem;
-#else
-        Process *process;
-#endif
-        int issueWidth;
-    };
+    typedef typename Impl::Params Params;
 
-    OoOCPU(Params *params);
+    OzoneCPU(Params *params);
 
-    virtual ~OoOCPU();
+    virtual ~OzoneCPU();
 
     void init();
 
-  private:
-    void copyFromXC();
-
   public:
-    // execution context
-    ExecContext *xc;
+    BaseCPU *getCpuPtr() { return this; }
+
+    void setCpuId(int id) { cpuId = id; }
+
+    int readCpuId() { return cpuId; }
+
+    int cpuId;
 
-    void switchOut();
+    void switchOut(Sampler *sampler);
+    void signalSwitched();
     void takeOverFrom(BaseCPU *oldCPU);
 
+    Sampler *sampler;
+
+    int switchCount;
+
 #if FULL_SYSTEM
     Addr dbg_vtophys(Addr addr);
 
     bool interval_stats;
+
+    AlphaITB *itb;
+    AlphaDTB *dtb;
+    System *system;
+
+    // the following two fields are redundant, since we can always
+    // look them up through the system pointer, but we'll leave them
+    // here for now for convenience
+    MemoryController *memctrl;
+    PhysicalMemory *physmem;
 #endif
 
     // L1 instruction cache
@@ -185,54 +355,15 @@ class OoOCPU : public BaseCPU
     // L1 data cache
     MemInterface *dcacheInterface;
 
-    FuncUnitPool *fuPool;
+    /** Pointer to memory. */
+    FunctionalMemory *mem;
 
-    // Refcounted pointer to the one memory request.
-    MemReqPtr cacheMemReq;
-
-    class ICacheCompletionEvent : public Event
-    {
-      private:
-        OoOCPU *cpu;
-
-      public:
-        ICacheCompletionEvent(OoOCPU *_cpu);
-
-        virtual void process();
-        virtual const char *description();
-    };
-
-    // Will need to create a cache completion event upon any memory miss.
-    ICacheCompletionEvent iCacheCompletionEvent;
-
-    class DCacheCompletionEvent;
-
-    typedef typename
-    std::list<DCacheCompletionEvent>::iterator DCacheCompEventIt;
-
-    class DCacheCompletionEvent : public Event
-    {
-      private:
-        OoOCPU *cpu;
-        DynInstPtr inst;
-        DCacheCompEventIt dcceIt;
-
-      public:
-        DCacheCompletionEvent(OoOCPU *_cpu, DynInstPtr &_inst,
-                              DCacheCompEventIt &_dcceIt);
-
-        virtual void process();
-        virtual const char *description();
-    };
-
-    friend class DCacheCompletionEvent;
-
-  protected:
-    std::list<DCacheCompletionEvent> dCacheCompList;
-    DCacheCompEventIt dcceIt;
+    FrontEnd *frontEnd;
 
+    BackEnd *backEnd;
   private:
     Status status() const { return _status; }
+    void setStatus(Status new_status) { _status = new_status; }
 
     virtual void activateContext(int thread_num, int delay);
     virtual void suspendContext(int thread_num);
@@ -244,18 +375,16 @@ class OoOCPU : public BaseCPU
     virtual void resetStats();
 
     // number of simulated instructions
+  public:
     Counter numInst;
     Counter startNumInst;
-    Stats::Scalar<> numInsts;
 
     virtual Counter totalInstructions() const
     {
         return numInst - startNumInst;
     }
 
-    // number of simulated memory references
-    Stats::Scalar<> numMemRefs;
-
+  private:
     // number of simulated loads
     Counter numLoad;
     Counter startNumLoad;
@@ -263,27 +392,15 @@ class OoOCPU : public BaseCPU
     // number of idle cycles
     Stats::Average<> notIdleFraction;
     Stats::Formula idleFraction;
-
-    // number of cycles stalled for I-cache misses
-    Stats::Scalar<> icacheStallCycles;
-    Counter lastIcacheStall;
-
-    // number of cycles stalled for D-cache misses
-    Stats::Scalar<> dcacheStallCycles;
-    Counter lastDcacheStall;
-
-    void processICacheCompletion();
-
   public:
 
     virtual void serialize(std::ostream &os);
     virtual void unserialize(Checkpoint *cp, const std::string &section);
 
+
 #if FULL_SYSTEM
     bool validInstAddr(Addr addr) { return true; }
     bool validDataAddr(Addr addr) { return true; }
-    int getInstAsid() { return xc->regs.instAsid(); }
-    int getDataAsid() { return xc->regs.dataAsid(); }
 
     Fault translateInstReq(MemReqPtr &req)
     {
@@ -302,13 +419,13 @@ class OoOCPU : public BaseCPU
 
 #else
     bool validInstAddr(Addr addr)
-    { return xc->validInstAddr(addr); }
+    { return true; }
 
     bool validDataAddr(Addr addr)
-    { return xc->validDataAddr(addr); }
+    { return true; }
 
-    int getInstAsid() { return xc->asid; }
-    int getDataAsid() { return xc->asid; }
+    int getInstAsid() { return thread.asid; }
+    int getDataAsid() { return thread.asid; }
 
     Fault dummyTranslation(MemReqPtr &req)
     {
@@ -321,318 +438,192 @@ class OoOCPU : public BaseCPU
         req->paddr = req->paddr | (Addr)req->asid << sizeof(Addr) * 8 - 16;
         return NoFault;
     }
+
+    /** Translates instruction requestion in syscall emulation mode. */
     Fault translateInstReq(MemReqPtr &req)
     {
         return dummyTranslation(req);
     }
+
+    /** Translates data read request in syscall emulation mode. */
     Fault translateDataReadReq(MemReqPtr &req)
     {
         return dummyTranslation(req);
     }
+
+    /** Translates data write request in syscall emulation mode. */
     Fault translateDataWriteReq(MemReqPtr &req)
     {
         return dummyTranslation(req);
     }
-
 #endif
 
+    /** Old CPU read from memory function. No longer used. */
     template <class T>
-    Fault read(Addr addr, T &data, unsigned flags, DynInstPtr inst);
-
-    template <class T>
-    Fault write(T data, Addr addr, unsigned flags,
-                uint64_t *res, DynInstPtr inst);
-
-    void prefetch(Addr addr, unsigned flags)
+    Fault read(MemReqPtr &req, T &data)
     {
-        // need to do this...
-    }
-
-    void writeHint(Addr addr, int size, unsigned flags)
-    {
-        // need to do this...
-    }
-
-    Fault copySrcTranslate(Addr src);
-
-    Fault copy(Addr dest);
-
-  private:
-    bool executeInst(DynInstPtr &inst);
-
-    void renameInst(DynInstPtr &inst);
-
-    void addInst(DynInstPtr &inst);
-
-    void commitHeadInst();
-
-    bool getOneInst();
-
-    Fault fetchCacheLine();
-
-    InstSeqNum getAndIncrementInstSeq();
-
-    bool ambigMemAddr;
-
-  private:
-    InstSeqNum globalSeqNum;
-
-    DynInstPtr renameTable[TheISA::TotalNumRegs];
-    DynInstPtr commitTable[TheISA::TotalNumRegs];
-
-    // Might need a table of the shadow registers as well.
-#if FULL_SYSTEM
-    DynInstPtr palShadowTable[TheISA::NumIntRegs];
+#if 0
+#if FULL_SYSTEM && defined(TARGET_ALPHA)
+        if (req->flags & LOCKED) {
+            req->xc->setMiscReg(TheISA::Lock_Addr_DepTag, req->paddr);
+            req->xc->setMiscReg(TheISA::Lock_Flag_DepTag, true);
+        }
+#endif
 #endif
+        Fault error;
+        if (req->flags & LOCKED) {
+            lockAddrList.insert(req->paddr);
+            lockFlag = true;
+        }
 
-  public:
-    // The register accessor methods provide the index of the
-    // instruction's operand (e.g., 0 or 1), not the architectural
-    // register index, to simplify the implementation of register
-    // renaming.  We find the architectural register index by indexing
-    // into the instruction's own operand index table.  Note that a
-    // raw pointer to the StaticInst is provided instead of a
-    // ref-counted StaticInstPtr to redice overhead.  This is fine as
-    // long as these methods don't copy the pointer into any long-term
-    // storage (which is pretty hard to imagine they would have reason
-    // to do).
-
-    // In the OoO case these shouldn't read from the XC but rather from the
-    // rename table of DynInsts.  Also these likely shouldn't be called very
-    // often, other than when adding things into the xc during say a syscall.
-
-    uint64_t readIntReg(StaticInst *si, int idx)
-    {
-        return xc->readIntReg(si->srcRegIdx(idx));
+        error = this->mem->read(req, data);
+        data = gtoh(data);
+        return error;
     }
 
-    FloatReg readFloatReg(StaticInst *si, int idx, width)
-    {
-        int reg_idx = si->srcRegIdx(idx) - TheISA::FP_Base_DepTag;
-        return xc->readFloatReg(reg_idx, width);
-    }
 
-    FloatReg readFloatReg(StaticInst *si, int idx)
+    /** CPU read function, forwards read to LSQ. */
+    template <class T>
+    Fault read(MemReqPtr &req, T &data, int load_idx)
     {
-        int reg_idx = si->srcRegIdx(idx) - TheISA::FP_Base_DepTag;
-        return xc->readFloatReg(reg_idx);
+        return backEnd->read(req, data, load_idx);
     }
 
-    FloatRegBits readFloatRegBits(StaticInst *si, int idx, int width)
+    /** Old CPU write to memory function. No longer used. */
+    template <class T>
+    Fault write(MemReqPtr &req, T &data)
     {
-        int reg_idx = si->srcRegIdx(idx) - TheISA::FP_Base_DepTag;
-        return xc->readFloatRegBits(reg_idx, width);
-    }
+#if 0
+#if FULL_SYSTEM && defined(TARGET_ALPHA)
+        ExecContext *xc;
+
+        // If this is a store conditional, act appropriately
+        if (req->flags & LOCKED) {
+            xc = req->xc;
+
+            if (req->flags & UNCACHEABLE) {
+                // Don't update result register (see stq_c in isa_desc)
+                req->result = 2;
+                xc->setStCondFailures(0);//Needed? [RGD]
+            } else {
+                bool lock_flag = xc->readMiscReg(TheISA::Lock_Flag_DepTag);
+                Addr lock_addr = xc->readMiscReg(TheISA::Lock_Addr_DepTag);
+                req->result = lock_flag;
+                if (!lock_flag ||
+                    ((lock_addr & ~0xf) != (req->paddr & ~0xf))) {
+                    xc->setMiscReg(TheISA::Lock_Flag_DepTag, false);
+                    xc->setStCondFailures(xc->readStCondFailures() + 1);
+                    if (((xc->readStCondFailures()) % 100000) == 0) {
+                        std::cerr << "Warning: "
+                                  << xc->readStCondFailures()
+                                  << " consecutive store conditional failures "
+                                  << "on cpu " << req->xc->readCpuId()
+                                  << std::endl;
+                    }
+                    return NoFault;
+                }
+                else xc->setStCondFailures(0);
+            }
+        }
 
-    FloatRegBits readFloatRegBits(StaticInst *si, int idx)
-    {
-        int reg_idx = si->srcRegIdx(idx) - TheISA::FP_Base_DepTag;
-        return xc->readFloatRegBits(reg_idx);
-    }
+        // Need to clear any locked flags on other proccessors for
+        // this address.  Only do this for succsful Store Conditionals
+        // and all other stores (WH64?).  Unsuccessful Store
+        // Conditionals would have returned above, and wouldn't fall
+        // through.
+        for (int i = 0; i < this->system->execContexts.size(); i++){
+            xc = this->system->execContexts[i];
+            if ((xc->readMiscReg(TheISA::Lock_Addr_DepTag) & ~0xf) ==
+                (req->paddr & ~0xf)) {
+                xc->setMiscReg(TheISA::Lock_Flag_DepTag, false);
+            }
+        }
 
-    void setIntReg(StaticInst *si, int idx, uint64_t val)
-    {
-        xc->setIntReg(si->destRegIdx(idx), val);
-    }
+#endif
+#endif
 
-    void setFloatReg(StaticInst *si, int idx, FloatReg val, int width)
-    {
-        int reg_idx = si->destRegIdx(idx) - TheISA::FP_Base_DepTag;
-        xc->setFloatReg(reg_idx, val, width);
-    }
+        if (req->flags & LOCKED) {
+            if (req->flags & UNCACHEABLE) {
+                req->result = 2;
+            } else {
+                if (this->lockFlag) {
+                    if (lockAddrList.find(req->paddr) !=
+                        lockAddrList.end()) {
+                        req->result = 1;
+                    } else {
+                        req->result = 0;
+                        return NoFault;
+                    }
+                } else {
+                    req->result = 0;
+                    return NoFault;
+                }
+            }
+        }
 
-    void setFloatReg(StaticInst *si, int idx, FloatReg val)
-    {
-        int reg_idx = si->destRegIdx(idx) - TheISA::FP_Base_DepTag;
-        xc->setFloatReg(reg_idx, val);
+        return this->mem->write(req, (T)htog(data));
     }
 
-    void setFloatRegBits(StaticInst *si, int idx, FloatRegBits val, int width)
+    /** CPU write function, forwards write to LSQ. */
+    template <class T>
+    Fault write(MemReqPtr &req, T &data, int store_idx)
     {
-        int reg_idx = si->destRegIdx(idx) - TheISA::FP_Base_DepTag;
-        xc->setFloatRegBits(reg_idx, val, width);
+        return backEnd->write(req, data, store_idx);
     }
 
-    void setFloatRegBits(StaticInst *si, int idx, FloatRegBits val)
+    void prefetch(Addr addr, unsigned flags)
     {
-        int reg_idx = si->destRegIdx(idx) - TheISA::FP_Base_DepTag;
-        xc->setFloatRegBits(reg_idx, val);
+        // need to do this...
     }
 
-    uint64_t readPC() { return PC; }
-    void setNextPC(Addr val) { nextPC = val; }
-
-  private:
-    Addr PC;
-    Addr nextPC;
-
-    unsigned issueWidth;
-
-    bool fetchRedirExcp;
-    bool fetchRedirBranch;
-
-    /** Mask to get a cache block's address. */
-    Addr cacheBlkMask;
-
-    unsigned cacheBlkSize;
-
-    Addr cacheBlkPC;
-
-    /** The cache line being fetched. */
-    uint8_t *cacheData;
-
-  protected:
-    bool cacheBlkValid;
-
-  private:
-
-    // Align an address (typically a PC) to the start of an I-cache block.
-    // We fold in the PISA 64- to 32-bit conversion here as well.
-    Addr icacheBlockAlignPC(Addr addr)
+    void writeHint(Addr addr, int size, unsigned flags)
     {
-        addr = TheISA::realPCToFetchPC(addr);
-        return (addr & ~(cacheBlkMask));
+        // need to do this...
     }
 
-    unsigned instSize;
+    Fault copySrcTranslate(Addr src);
 
-    // ROB tracking stuff.
-    DynInstPtr robHeadPtr;
-    DynInstPtr robTailPtr;
-    unsigned robSize;
-    unsigned robInsts;
+    Fault copy(Addr dest);
 
-    // List of outstanding EA instructions.
-  protected:
-    EAList eaList;
+    InstSeqNum globalSeqNum;
 
   public:
-    void branchToTarget(Addr val)
-    {
-        if (!fetchRedirExcp) {
-            fetchRedirBranch = true;
-            PC = val;
-        }
-    }
-
-    // ISA stuff:
-    uint64_t readUniq() { return xc->readUniq(); }
-    void setUniq(uint64_t val) { xc->setUniq(val); }
+    void squashFromXC();
 
-    uint64_t readFpcr() { return xc->readFpcr(); }
-    void setFpcr(uint64_t val) { xc->setFpcr(val); }
+    // @todo: This can be a useful debug function.  Implement it.
+    void dumpInsts() { frontEnd->dumpInsts(); }
 
 #if FULL_SYSTEM
-    uint64_t readIpr(int idx, Fault &fault) { return xc->readIpr(idx, fault); }
-    Fault setIpr(int idx, uint64_t val) { return xc->setIpr(idx, val); }
-    Fault hwrei() { return xc->hwrei(); }
-    int readIntrFlag() { return xc->readIntrFlag(); }
-    void setIntrFlag(int val) { xc->setIntrFlag(val); }
-    bool inPalMode() { return xc->inPalMode(); }
-    void trap(Fault fault) { fault->invoke(xc); }
-    bool simPalCheck(int palFunc) { return xc->simPalCheck(palFunc); }
+    Fault hwrei();
+    int readIntrFlag() { return thread.regs.intrflag; }
+    void setIntrFlag(int val) { thread.regs.intrflag = val; }
+    bool inPalMode() { return AlphaISA::PcPAL(thread.PC); }
+    bool inPalMode(Addr pc) { return AlphaISA::PcPAL(pc); }
+    bool simPalCheck(int palFunc);
+    void processInterrupts();
 #else
-    void syscall() { xc->syscall(); }
-#endif
-
-    ExecContext *xcBase() { return xc; }
-};
-
-
-// precise architected memory state accessor macros
-template <class Impl>
-template <class T>
-Fault
-OoOCPU<Impl>::read(Addr addr, T &data, unsigned flags, DynInstPtr inst)
-{
-    MemReqPtr readReq = new MemReq();
-    readReq->xc = xc;
-    readReq->asid = 0;
-    readReq->data = new uint8_t[64];
-
-    readReq->reset(addr, sizeof(T), flags);
-
-    // translate to physical address - This might be an ISA impl call
-    Fault fault = translateDataReadReq(readReq);
-
-    // do functional access
-    if (fault == NoFault)
-        fault = xc->mem->read(readReq, data);
-#if 0
-    if (traceData) {
-        traceData->setAddr(addr);
-        if (fault == NoFault)
-            traceData->setData(data);
-    }
+    void syscall();
+    void setSyscallReturn(SyscallReturn return_value, int tid);
 #endif
 
-    // if we have a cache, do cache access too
-    if (fault == NoFault && dcacheInterface) {
-        readReq->cmd = Read;
-        readReq->completionEvent = NULL;
-        readReq->time = curTick;
-        /*MemAccessResult result = */dcacheInterface->access(readReq);
+    ExecContext *xcBase() { return xcProxy; }
 
-        if (dcacheInterface->doEvents()) {
-            readReq->completionEvent = new DCacheCompletionEvent(this, inst,
-                                                                 dcceIt);
-        }
-    }
-
-    if (!dcacheInterface && (readReq->flags & UNCACHEABLE))
-        recordEvent("Uncached Read");
-
-    return fault;
-}
-
-template <class Impl>
-template <class T>
-Fault
-OoOCPU<Impl>::write(T data, Addr addr, unsigned flags,
-                    uint64_t *res, DynInstPtr inst)
-{
-    MemReqPtr writeReq = new MemReq();
-    writeReq->xc = xc;
-    writeReq->asid = 0;
-    writeReq->data = new uint8_t[64];
+    bool decoupledFrontEnd;
+    struct CommStruct {
+        InstSeqNum doneSeqNum;
+        InstSeqNum nonSpecSeqNum;
+        bool uncached;
+        unsigned lqIdx;
 
-#if 0
-    if (traceData) {
-        traceData->setAddr(addr);
-        traceData->setData(data);
-    }
-#endif
-
-    writeReq->reset(addr, sizeof(T), flags);
-
-    // translate to physical address
-    Fault fault = translateDataWriteReq(writeReq);
-
-    // do functional access
-    if (fault == NoFault)
-        fault = xc->write(writeReq, data);
-
-    if (fault == NoFault && dcacheInterface) {
-        writeReq->cmd = Write;
-        memcpy(writeReq->data,(uint8_t *)&data,writeReq->size);
-        writeReq->completionEvent = NULL;
-        writeReq->time = curTick;
-        /*MemAccessResult result = */dcacheInterface->access(writeReq);
-
-        if (dcacheInterface->doEvents()) {
-            writeReq->completionEvent = new DCacheCompletionEvent(this, inst,
-                                                                  dcceIt);
-        }
-    }
-
-    if (res && (fault == NoFault))
-        *res = writeReq->result;
+        bool stall;
+    };
+    TimeBuffer<CommStruct> comm;
 
-    if (!dcacheInterface && (writeReq->flags & UNCACHEABLE))
-        recordEvent("Uncached Write");
+    bool lockFlag;
 
-    return fault;
-}
+    Stats::Scalar<> quiesceCycles;
 
+    Checker<DynInstPtr> *checker;
+};
 
-#endif // __CPU_OOO_CPU_OOO_CPU_HH__
+#endif // __CPU_OZONE_CPU_HH__
diff --git a/src/cpu/ozone/cpu_impl.hh b/src/cpu/ozone/cpu_impl.hh
index e7ed3cfe0..5675da3a8 100644
--- a/src/cpu/ozone/cpu_impl.hh
+++ b/src/cpu/ozone/cpu_impl.hh
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2005 The Regents of The University of Michigan
+ * Copyright (c) 2006 The Regents of The University of Michigan
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -26,23 +26,1024 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef __CPU_OOO_CPU_OOO_IMPL_HH__
-#define __CPU_OOO_CPU_OOO_IMPL_HH__
+//#include <cstdio>
+//#include <cstdlib>
 
-#include "arch/isa_traits.hh"
+#include "arch/isa_traits.hh" // For MachInst
+#include "base/trace.hh"
+#include "config/full_system.hh"
+#include "cpu/base.hh"
+#include "cpu/checker/exec_context.hh"
+#include "cpu/exec_context.hh"
+#include "cpu/exetrace.hh"
+#include "cpu/ozone/cpu.hh"
+#include "cpu/quiesce_event.hh"
+#include "cpu/static_inst.hh"
+//#include "mem/base_mem.hh"
+#include "mem/mem_interface.hh"
+#include "sim/sim_object.hh"
+#include "sim/stats.hh"
+
+#if FULL_SYSTEM
+#include "arch/faults.hh"
+#include "arch/alpha/osfpal.hh"
+#include "arch/alpha/tlb.hh"
+#include "arch/vtophys.hh"
+#include "base/callback.hh"
+//#include "base/remote_gdb.hh"
+#include "cpu/profile.hh"
+#include "kern/kernel_stats.hh"
+#include "mem/functional/memory_control.hh"
+#include "mem/functional/physical.hh"
+#include "sim/faults.hh"
+#include "sim/sim_events.hh"
+#include "sim/sim_exit.hh"
+#include "sim/system.hh"
+#else // !FULL_SYSTEM
+#include "mem/functional/functional.hh"
+#include "sim/process.hh"
+#endif // FULL_SYSTEM
+
+using namespace TheISA;
+
+template <class Impl>
+template<typename T>
+void
+OzoneCPU<Impl>::trace_data(T data) {
+    if (traceData) {
+        traceData->setData(data);
+    }
+}
+
+template <class Impl>
+OzoneCPU<Impl>::TickEvent::TickEvent(OzoneCPU *c, int w)
+    : Event(&mainEventQueue, CPU_Tick_Pri), cpu(c), width(w)
+{
+}
+
+template <class Impl>
+void
+OzoneCPU<Impl>::TickEvent::process()
+{
+    cpu->tick();
+}
+
+template <class Impl>
+const char *
+OzoneCPU<Impl>::TickEvent::description()
+{
+    return "OzoneCPU tick event";
+}
+
+template <class Impl>
+OzoneCPU<Impl>::OzoneCPU(Params *p)
+#if FULL_SYSTEM
+    : BaseCPU(p), thread(this, 0, p->mem), tickEvent(this, p->width),
+      mem(p->mem),
+#else
+    : BaseCPU(p), thread(this, 0, p->workload[0], 0), tickEvent(this, p->width),
+      mem(p->workload[0]->getMemory()),
+#endif
+      comm(5, 5)
+{
+    frontEnd = new FrontEnd(p);
+    backEnd = new BackEnd(p);
+
+    _status = Idle;
+
+    if (p->checker) {
+        BaseCPU *temp_checker = p->checker;
+        checker = dynamic_cast<Checker<DynInstPtr> *>(temp_checker);
+        checker->setMemory(mem);
+#if FULL_SYSTEM
+        checker->setSystem(p->system);
+#endif
+        checkerXC = new CheckerExecContext<OzoneXC>(&ozoneXC, checker);
+        thread.xcProxy = checkerXC;
+        xcProxy = checkerXC;
+    } else {
+        checker = NULL;
+        thread.xcProxy = &ozoneXC;
+        xcProxy = &ozoneXC;
+    }
+
+    ozoneXC.cpu = this;
+    ozoneXC.thread = &thread;
+
+    thread.inSyscall = false;
+
+    thread.setStatus(ExecContext::Suspended);
+#if FULL_SYSTEM
+    /***** All thread state stuff *****/
+    thread.cpu = this;
+    thread.tid = 0;
+    thread.mem = p->mem;
+
+    thread.quiesceEvent = new EndQuiesceEvent(xcProxy);
+
+    system = p->system;
+    itb = p->itb;
+    dtb = p->dtb;
+    memctrl = p->system->memctrl;
+    physmem = p->system->physmem;
+
+    if (p->profile) {
+        thread.profile = new FunctionProfile(p->system->kernelSymtab);
+        // @todo: This might be better as an ExecContext instead of OzoneXC
+        Callback *cb =
+            new MakeCallback<OzoneXC,
+            &OzoneXC::dumpFuncProfile>(&ozoneXC);
+        registerExitCallback(cb);
+    }
+
+    // let's fill with a dummy node for now so we don't get a segfault
+    // on the first cycle when there's no node available.
+    static ProfileNode dummyNode;
+    thread.profileNode = &dummyNode;
+    thread.profilePC = 3;
+#else
+    thread.cpu = this;
+    thread.tid = 0;
+    thread.process = p->workload[0];
+    thread.asid = 0;
+#endif // !FULL_SYSTEM
+
+    numInst = 0;
+    startNumInst = 0;
+
+    execContexts.push_back(xcProxy);
+
+    frontEnd->setCPU(this);
+    backEnd->setCPU(this);
+
+    frontEnd->setXC(xcProxy);
+    backEnd->setXC(xcProxy);
+
+    frontEnd->setThreadState(&thread);
+    backEnd->setThreadState(&thread);
+
+    frontEnd->setCommBuffer(&comm);
+    backEnd->setCommBuffer(&comm);
+
+    frontEnd->setBackEnd(backEnd);
+    backEnd->setFrontEnd(frontEnd);
+
+    decoupledFrontEnd = p->decoupledFrontEnd;
+
+    globalSeqNum = 1;
+
+    checkInterrupts = false;
+
+    for (int i = 0; i < TheISA::TotalNumRegs; ++i) {
+        thread.renameTable[i] = new DynInst(this);
+        thread.renameTable[i]->setResultReady();
+    }
+
+    frontEnd->renameTable.copyFrom(thread.renameTable);
+    backEnd->renameTable.copyFrom(thread.renameTable);
+
+#if !FULL_SYSTEM
+//    pTable = p->pTable;
+#endif
+
+    lockFlag = 0;
+
+    DPRINTF(OzoneCPU, "OzoneCPU: Created Ozone cpu object.\n");
+}
+
+template <class Impl>
+OzoneCPU<Impl>::~OzoneCPU()
+{
+}
+
+template <class Impl>
+void
+OzoneCPU<Impl>::switchOut(Sampler *_sampler)
+{
+    sampler = _sampler;
+    switchCount = 0;
+    // Front end needs state from back end, so switch out the back end first.
+    backEnd->switchOut();
+    frontEnd->switchOut();
+}
+
+template <class Impl>
+void
+OzoneCPU<Impl>::signalSwitched()
+{
+    if (++switchCount == 2) {
+        backEnd->doSwitchOut();
+        frontEnd->doSwitchOut();
+        if (checker)
+            checker->switchOut(sampler);
+        _status = SwitchedOut;
+        if (tickEvent.scheduled())
+            tickEvent.squash();
+        sampler->signalSwitched();
+    }
+    assert(switchCount <= 2);
+}
+
+template <class Impl>
+void
+OzoneCPU<Impl>::takeOverFrom(BaseCPU *oldCPU)
+{
+    BaseCPU::takeOverFrom(oldCPU);
+
+    backEnd->takeOverFrom();
+    frontEnd->takeOverFrom();
+    assert(!tickEvent.scheduled());
+
+    // @todo: Fix hardcoded number
+    // Clear out any old information in time buffer.
+    for (int i = 0; i < 6; ++i) {
+        comm.advance();
+    }
+
+    // if any of this CPU's ExecContexts are active, mark the CPU as
+    // running and schedule its tick event.
+    for (int i = 0; i < execContexts.size(); ++i) {
+        ExecContext *xc = execContexts[i];
+        if (xc->status() == ExecContext::Active &&
+            _status != Running) {
+            _status = Running;
+            tickEvent.schedule(curTick);
+        }
+    }
+    // Nothing running, change status to reflect that we're no longer
+    // switched out.
+    if (_status == SwitchedOut) {
+        _status = Idle;
+    }
+}
+
+template <class Impl>
+void
+OzoneCPU<Impl>::activateContext(int thread_num, int delay)
+{
+    // Eventually change this in SMT.
+    assert(thread_num == 0);
+
+    assert(_status == Idle);
+    notIdleFraction++;
+    scheduleTickEvent(delay);
+    _status = Running;
+    thread._status = ExecContext::Active;
+    frontEnd->wakeFromQuiesce();
+}
+
+template <class Impl>
+void
+OzoneCPU<Impl>::suspendContext(int thread_num)
+{
+    // Eventually change this in SMT.
+    assert(thread_num == 0);
+    // @todo: Figure out how to initially set the status properly so
+    // this is running.
+//    assert(_status == Running);
+    notIdleFraction--;
+    unscheduleTickEvent();
+    _status = Idle;
+}
+
+template <class Impl>
+void
+OzoneCPU<Impl>::deallocateContext(int thread_num)
+{
+    // for now, these are equivalent
+    suspendContext(thread_num);
+}
 
 template <class Impl>
-class OoOCPU;
+void
+OzoneCPU<Impl>::haltContext(int thread_num)
+{
+    // for now, these are equivalent
+    suspendContext(thread_num);
+}
+
+template <class Impl>
+void
+OzoneCPU<Impl>::regStats()
+{
+    using namespace Stats;
+
+    BaseCPU::regStats();
+
+    thread.numInsts
+        .name(name() + ".num_insts")
+        .desc("Number of instructions executed")
+        ;
+
+    thread.numMemRefs
+        .name(name() + ".num_refs")
+        .desc("Number of memory references")
+        ;
+
+    notIdleFraction
+        .name(name() + ".not_idle_fraction")
+        .desc("Percentage of non-idle cycles")
+        ;
+
+    idleFraction
+        .name(name() + ".idle_fraction")
+        .desc("Percentage of idle cycles")
+        ;
+
+    quiesceCycles
+        .name(name() + ".quiesce_cycles")
+        .desc("Number of cycles spent in quiesce")
+        ;
+
+    idleFraction = constant(1.0) - notIdleFraction;
+
+    frontEnd->regStats();
+    backEnd->regStats();
+}
+
+template <class Impl>
+void
+OzoneCPU<Impl>::resetStats()
+{
+    startNumInst = numInst;
+    notIdleFraction = (_status != Idle);
+}
+
+template <class Impl>
+void
+OzoneCPU<Impl>::init()
+{
+    BaseCPU::init();
+
+    // Mark this as in syscall so it won't need to squash
+    thread.inSyscall = true;
+#if FULL_SYSTEM
+    for (int i = 0; i < execContexts.size(); ++i) {
+        ExecContext *xc = execContexts[i];
+
+        // initialize CPU, including PC
+        TheISA::initCPU(xc, xc->readCpuId());
+    }
+#endif
+    frontEnd->renameTable.copyFrom(thread.renameTable);
+    backEnd->renameTable.copyFrom(thread.renameTable);
+
+    thread.inSyscall = false;
+}
+
+template <class Impl>
+void
+OzoneCPU<Impl>::serialize(std::ostream &os)
+{
+    BaseCPU::serialize(os);
+    SERIALIZE_ENUM(_status);
+    nameOut(os, csprintf("%s.xc", name()));
+    ozoneXC.serialize(os);
+    nameOut(os, csprintf("%s.tickEvent", name()));
+    tickEvent.serialize(os);
+}
+
+template <class Impl>
+void
+OzoneCPU<Impl>::unserialize(Checkpoint *cp, const std::string &section)
+{
+    BaseCPU::unserialize(cp, section);
+    UNSERIALIZE_ENUM(_status);
+    ozoneXC.unserialize(cp, csprintf("%s.xc", section));
+    tickEvent.unserialize(cp, csprintf("%s.tickEvent", section));
+}
+
+template <class Impl>
+Fault
+OzoneCPU<Impl>::copySrcTranslate(Addr src)
+{
+    panic("Copy not implemented!\n");
+    return NoFault;
+#if 0
+    static bool no_warn = true;
+    int blk_size = (dcacheInterface) ? dcacheInterface->getBlockSize() : 64;
+    // Only support block sizes of 64 atm.
+    assert(blk_size == 64);
+    int offset = src & (blk_size - 1);
+
+    // Make sure block doesn't span page
+    if (no_warn &&
+        (src & TheISA::PageMask) != ((src + blk_size) & TheISA::PageMask) &&
+        (src >> 40) != 0xfffffc) {
+        warn("Copied block source spans pages %x.", src);
+        no_warn = false;
+    }
+
+    memReq->reset(src & ~(blk_size - 1), blk_size);
+
+    // translate to physical address
+    Fault fault = xc->translateDataReadReq(memReq);
+
+    assert(fault != Alignment_Fault);
+
+    if (fault == NoFault) {
+        xc->copySrcAddr = src;
+        xc->copySrcPhysAddr = memReq->paddr + offset;
+    } else {
+        xc->copySrcAddr = 0;
+        xc->copySrcPhysAddr = 0;
+    }
+    return fault;
+#endif
+}
+
+template <class Impl>
+Fault
+OzoneCPU<Impl>::copy(Addr dest)
+{
+    panic("Copy not implemented!\n");
+    return NoFault;
+#if 0
+    static bool no_warn = true;
+    int blk_size = (dcacheInterface) ? dcacheInterface->getBlockSize() : 64;
+    // Only support block sizes of 64 atm.
+    assert(blk_size == 64);
+    uint8_t data[blk_size];
+    //assert(xc->copySrcAddr);
+    int offset = dest & (blk_size - 1);
+
+    // Make sure block doesn't span page
+    if (no_warn &&
+        (dest & TheISA::PageMask) != ((dest + blk_size) & TheISA::PageMask) &&
+        (dest >> 40) != 0xfffffc) {
+        no_warn = false;
+        warn("Copied block destination spans pages %x. ", dest);
+    }
+
+    memReq->reset(dest & ~(blk_size -1), blk_size);
+    // translate to physical address
+    Fault fault = xc->translateDataWriteReq(memReq);
+
+    assert(fault != Alignment_Fault);
+
+    if (fault == NoFault) {
+        Addr dest_addr = memReq->paddr + offset;
+        // Need to read straight from memory since we have more than 8 bytes.
+        memReq->paddr = xc->copySrcPhysAddr;
+        xc->mem->read(memReq, data);
+        memReq->paddr = dest_addr;
+        xc->mem->write(memReq, data);
+        if (dcacheInterface) {
+            memReq->cmd = Copy;
+            memReq->completionEvent = NULL;
+            memReq->paddr = xc->copySrcPhysAddr;
+            memReq->dest = dest_addr;
+            memReq->size = 64;
+            memReq->time = curTick;
+            dcacheInterface->access(memReq);
+        }
+    }
+    return fault;
+#endif
+}
+
+#if FULL_SYSTEM
+template <class Impl>
+Addr
+OzoneCPU<Impl>::dbg_vtophys(Addr addr)
+{
+    return vtophys(xcProxy, addr);
+}
+#endif // FULL_SYSTEM
+
+#if FULL_SYSTEM
+template <class Impl>
+void
+OzoneCPU<Impl>::post_interrupt(int int_num, int index)
+{
+    BaseCPU::post_interrupt(int_num, index);
+
+    if (_status == Idle) {
+        DPRINTF(IPI,"Suspended Processor awoke\n");
+//	thread.activate();
+        // Hack for now.  Otherwise might have to go through the xcProxy, or
+        // I need to figure out what's the right thing to call.
+        activateContext(thread.tid, 1);
+    }
+}
+#endif // FULL_SYSTEM
+
+/* start simulation, program loaded, processor precise state initialized */
+template <class Impl>
+void
+OzoneCPU<Impl>::tick()
+{
+    DPRINTF(OzoneCPU, "\n\nOzoneCPU: Ticking cpu.\n");
+
+    _status = Running;
+    thread.renameTable[ZeroReg]->setIntResult(0);
+    thread.renameTable[ZeroReg+TheISA::FP_Base_DepTag]->
+        setDoubleResult(0.0);
+
+    comm.advance();
+    frontEnd->tick();
+    backEnd->tick();
+
+    // check for instruction-count-based events
+    comInstEventQueue[0]->serviceEvents(numInst);
+
+    if (!tickEvent.scheduled() && _status == Running)
+        tickEvent.schedule(curTick + cycles(1));
+}
+
+template <class Impl>
+void
+OzoneCPU<Impl>::squashFromXC()
+{
+    thread.inSyscall = true;
+    backEnd->generateXCEvent();
+}
+
+#if !FULL_SYSTEM
+template <class Impl>
+void
+OzoneCPU<Impl>::syscall()
+{
+    // Not sure this copy is needed, depending on how the XC proxy is made.
+    thread.renameTable.copyFrom(backEnd->renameTable);
+
+    thread.inSyscall = true;
+
+    thread.funcExeInst++;
+
+    DPRINTF(OzoneCPU, "FuncExeInst: %i\n", thread.funcExeInst);
+
+    thread.process->syscall(xcProxy);
+
+    thread.funcExeInst--;
+
+    thread.inSyscall = false;
+
+    frontEnd->renameTable.copyFrom(thread.renameTable);
+    backEnd->renameTable.copyFrom(thread.renameTable);
+}
+
+template <class Impl>
+void
+OzoneCPU<Impl>::setSyscallReturn(SyscallReturn return_value, int tid)
+{
+    // check for error condition.  Alpha syscall convention is to
+    // indicate success/failure in reg a3 (r19) and put the
+    // return value itself in the standard return value reg (v0).
+    if (return_value.successful()) {
+        // no error
+        thread.renameTable[SyscallSuccessReg]->setIntResult(0);
+        thread.renameTable[ReturnValueReg]->setIntResult(
+            return_value.value());
+    } else {
+        // got an error, return details
+        thread.renameTable[SyscallSuccessReg]->setIntResult((IntReg) -1);
+        thread.renameTable[ReturnValueReg]->setIntResult(
+            -return_value.value());
+    }
+}
+#else
+template <class Impl>
+Fault
+OzoneCPU<Impl>::hwrei()
+{
+    // Need to move this to ISA code
+    // May also need to make this per thread
+
+    lockFlag = false;
+    lockAddrList.clear();
+    thread.kernelStats->hwrei();
+
+    checkInterrupts = true;
+
+    // FIXME: XXX check for interrupts? XXX
+    return NoFault;
+}
+
+template <class Impl>
+void
+OzoneCPU<Impl>::processInterrupts()
+{
+    // Check for interrupts here.  For now can copy the code that
+    // exists within isa_fullsys_traits.hh.  Also assume that thread 0
+    // is the one that handles the interrupts.
+
+    // Check if there are any outstanding interrupts
+    //Handle the interrupts
+    int ipl = 0;
+    int summary = 0;
+
+    checkInterrupts = false;
+
+    if (thread.readMiscReg(IPR_ASTRR))
+        panic("asynchronous traps not implemented\n");
+
+    if (thread.readMiscReg(IPR_SIRR)) {
+        for (int i = INTLEVEL_SOFTWARE_MIN;
+             i < INTLEVEL_SOFTWARE_MAX; i++) {
+            if (thread.readMiscReg(IPR_SIRR) & (ULL(1) << i)) {
+                // See table 4-19 of the 21164 hardware reference
+                ipl = (i - INTLEVEL_SOFTWARE_MIN) + 1;
+                summary |= (ULL(1) << i);
+            }
+        }
+    }
+
+    uint64_t interrupts = intr_status();
+
+    if (interrupts) {
+        for (int i = INTLEVEL_EXTERNAL_MIN;
+             i < INTLEVEL_EXTERNAL_MAX; i++) {
+            if (interrupts & (ULL(1) << i)) {
+                // See table 4-19 of the 21164 hardware reference
+                ipl = i;
+                summary |= (ULL(1) << i);
+            }
+        }
+    }
+
+    if (ipl && ipl > thread.readMiscReg(IPR_IPLR)) {
+        thread.setMiscReg(IPR_ISR, summary);
+        thread.setMiscReg(IPR_INTID, ipl);
+        // @todo: Make this more transparent
+        if (checker) {
+            checker->cpuXCBase()->setMiscReg(IPR_ISR, summary);
+            checker->cpuXCBase()->setMiscReg(IPR_INTID, ipl);
+        }
+        Fault fault = new InterruptFault;
+        fault->invoke(thread.getXCProxy());
+        DPRINTF(Flow, "Interrupt! IPLR=%d ipl=%d summary=%x\n",
+                thread.readMiscReg(IPR_IPLR), ipl, summary);
+    }
+}
+
+template <class Impl>
+bool
+OzoneCPU<Impl>::simPalCheck(int palFunc)
+{
+    // Need to move this to ISA code
+    // May also need to make this per thread
+    thread.kernelStats->callpal(palFunc, xcProxy);
+
+    switch (palFunc) {
+      case PAL::halt:
+        haltContext(thread.tid);
+        if (--System::numSystemsRunning == 0)
+            new SimExitEvent("all cpus halted");
+        break;
+
+      case PAL::bpt:
+      case PAL::bugchk:
+        if (system->breakpoint())
+            return false;
+        break;
+    }
+
+    return true;
+}
+#endif
+
+template <class Impl>
+BaseCPU *
+OzoneCPU<Impl>::OzoneXC::getCpuPtr()
+{
+    return cpu;
+}
+
+template <class Impl>
+void
+OzoneCPU<Impl>::OzoneXC::setCpuId(int id)
+{
+    cpu->cpuId = id;
+    thread->cpuId = id;
+}
+
+template <class Impl>
+void
+OzoneCPU<Impl>::OzoneXC::setStatus(Status new_status)
+{
+    thread->_status = new_status;
+}
+
+template <class Impl>
+void
+OzoneCPU<Impl>::OzoneXC::activate(int delay)
+{
+    cpu->activateContext(thread->tid, delay);
+}
+
+/// Set the status to Suspended.
+template <class Impl>
+void
+OzoneCPU<Impl>::OzoneXC::suspend()
+{
+    cpu->suspendContext(thread->tid);
+}
+
+/// Set the status to Unallocated.
+template <class Impl>
+void
+OzoneCPU<Impl>::OzoneXC::deallocate()
+{
+    cpu->deallocateContext(thread->tid);
+}
+
+/// Set the status to Halted.
+template <class Impl>
+void
+OzoneCPU<Impl>::OzoneXC::halt()
+{
+    cpu->haltContext(thread->tid);
+}
+
+#if FULL_SYSTEM
+template <class Impl>
+void
+OzoneCPU<Impl>::OzoneXC::dumpFuncProfile()
+{ }
+#endif
+
+template <class Impl>
+void
+OzoneCPU<Impl>::OzoneXC::takeOverFrom(ExecContext *old_context)
+{
+    // some things should already be set up
+    assert(getMemPtr() == old_context->getMemPtr());
+#if FULL_SYSTEM
+    assert(getSystemPtr() == old_context->getSystemPtr());
+#else
+    assert(getProcessPtr() == old_context->getProcessPtr());
+#endif
+
+    // copy over functional state
+    setStatus(old_context->status());
+    copyArchRegs(old_context);
+    setCpuId(old_context->readCpuId());
+
+#if !FULL_SYSTEM
+    setFuncExeInst(old_context->readFuncExeInst());
+#else
+    EndQuiesceEvent *other_quiesce = old_context->getQuiesceEvent();
+    if (other_quiesce) {
+        // Point the quiesce event's XC at this XC so that it wakes up
+        // the proper CPU.
+        other_quiesce->xc = this;
+    }
+    if (thread->quiesceEvent) {
+        thread->quiesceEvent->xc = this;
+    }
+
+    thread->kernelStats = old_context->getKernelStats();
+//    storeCondFailures = 0;
+    cpu->lockFlag = false;
+#endif
+
+    old_context->setStatus(ExecContext::Unallocated);
+}
+
+template <class Impl>
+void
+OzoneCPU<Impl>::OzoneXC::regStats(const std::string &name)
+{
+#if FULL_SYSTEM
+    thread->kernelStats = new Kernel::Statistics(cpu->system);
+    thread->kernelStats->regStats(name + ".kern");
+#endif
+}
+
+template <class Impl>
+void
+OzoneCPU<Impl>::OzoneXC::serialize(std::ostream &os)
+{ }
+
+template <class Impl>
+void
+OzoneCPU<Impl>::OzoneXC::unserialize(Checkpoint *cp, const std::string &section)
+{ }
+
+#if FULL_SYSTEM
+template <class Impl>
+EndQuiesceEvent *
+OzoneCPU<Impl>::OzoneXC::getQuiesceEvent()
+{
+    return thread->quiesceEvent;
+}
+
+template <class Impl>
+Tick
+OzoneCPU<Impl>::OzoneXC::readLastActivate()
+{
+    return thread->lastActivate;
+}
+
+template <class Impl>
+Tick
+OzoneCPU<Impl>::OzoneXC::readLastSuspend()
+{
+    return thread->lastSuspend;
+}
+
+template <class Impl>
+void
+OzoneCPU<Impl>::OzoneXC::profileClear()
+{
+    if (thread->profile)
+        thread->profile->clear();
+}
+
+template <class Impl>
+void
+OzoneCPU<Impl>::OzoneXC::profileSample()
+{
+    if (thread->profile)
+        thread->profile->sample(thread->profileNode, thread->profilePC);
+}
+#endif
+
+template <class Impl>
+int
+OzoneCPU<Impl>::OzoneXC::getThreadNum()
+{
+    return thread->tid;
+}
+
+// Also somewhat obnoxious.  Really only used for the TLB fault.
+template <class Impl>
+TheISA::MachInst
+OzoneCPU<Impl>::OzoneXC::getInst()
+{
+    return thread->inst;
+}
+
+template <class Impl>
+void
+OzoneCPU<Impl>::OzoneXC::copyArchRegs(ExecContext *xc)
+{
+    thread->PC = xc->readPC();
+    thread->nextPC = xc->readNextPC();
+
+    cpu->frontEnd->setPC(thread->PC);
+    cpu->frontEnd->setNextPC(thread->nextPC);
+
+    for (int i = 0; i < TheISA::TotalNumRegs; ++i) {
+        if (i < TheISA::FP_Base_DepTag) {
+            thread->renameTable[i]->setIntResult(xc->readIntReg(i));
+        } else if (i < (TheISA::FP_Base_DepTag + TheISA::NumFloatRegs)) {
+            int fp_idx = i - TheISA::FP_Base_DepTag;
+            thread->renameTable[i]->setDoubleResult(
+                xc->readFloatRegDouble(fp_idx));
+        }
+    }
+
+#if !FULL_SYSTEM
+    thread->funcExeInst = xc->readFuncExeInst();
+#endif
+
+    // Need to copy the XC values into the current rename table,
+    // copy the misc regs.
+    thread->regs.miscRegs.copyMiscRegs(xc);
+}
+
+template <class Impl>
+void
+OzoneCPU<Impl>::OzoneXC::clearArchRegs()
+{
+    panic("Unimplemented!");
+}
+
+template <class Impl>
+uint64_t
+OzoneCPU<Impl>::OzoneXC::readIntReg(int reg_idx)
+{
+    return thread->renameTable[reg_idx]->readIntResult();
+}
+
+template <class Impl>
+float
+OzoneCPU<Impl>::OzoneXC::readFloatRegSingle(int reg_idx)
+{
+    int idx = reg_idx + TheISA::FP_Base_DepTag;
+    return thread->renameTable[idx]->readFloatResult();
+}
+
+template <class Impl>
+double
+OzoneCPU<Impl>::OzoneXC::readFloatRegDouble(int reg_idx)
+{
+    int idx = reg_idx + TheISA::FP_Base_DepTag;
+    return thread->renameTable[idx]->readDoubleResult();
+}
+
+template <class Impl>
+uint64_t
+OzoneCPU<Impl>::OzoneXC::readFloatRegInt(int reg_idx)
+{
+    int idx = reg_idx + TheISA::FP_Base_DepTag;
+    return thread->renameTable[idx]->readIntResult();
+}
+
+template <class Impl>
+void
+OzoneCPU<Impl>::OzoneXC::setIntReg(int reg_idx, uint64_t val)
+{
+    thread->renameTable[reg_idx]->setIntResult(val);
+
+    if (!thread->inSyscall) {
+        cpu->squashFromXC();
+    }
+}
+
+template <class Impl>
+void
+OzoneCPU<Impl>::OzoneXC::setFloatRegSingle(int reg_idx, float val)
+{
+    panic("Unimplemented!");
+}
+
+template <class Impl>
+void
+OzoneCPU<Impl>::OzoneXC::setFloatRegDouble(int reg_idx, double val)
+{
+    int idx = reg_idx + TheISA::FP_Base_DepTag;
+
+    thread->renameTable[idx]->setDoubleResult(val);
+
+    if (!thread->inSyscall) {
+        cpu->squashFromXC();
+    }
+}
+
+template <class Impl>
+void
+OzoneCPU<Impl>::OzoneXC::setFloatRegInt(int reg_idx, uint64_t val)
+{
+    panic("Unimplemented!");
+}
+
+template <class Impl>
+void
+OzoneCPU<Impl>::OzoneXC::setPC(Addr val)
+{
+    thread->PC = val;
+    cpu->frontEnd->setPC(val);
+
+    if (!thread->inSyscall) {
+        cpu->squashFromXC();
+    }
+}
+
+template <class Impl>
+void
+OzoneCPU<Impl>::OzoneXC::setNextPC(Addr val)
+{
+    thread->nextPC = val;
+    cpu->frontEnd->setNextPC(val);
+
+    if (!thread->inSyscall) {
+        cpu->squashFromXC();
+    }
+}
+
+template <class Impl>
+TheISA::MiscReg
+OzoneCPU<Impl>::OzoneXC::readMiscReg(int misc_reg)
+{
+    return thread->regs.miscRegs.readReg(misc_reg);
+}
+
+template <class Impl>
+TheISA::MiscReg
+OzoneCPU<Impl>::OzoneXC::readMiscRegWithEffect(int misc_reg, Fault &fault)
+{
+    return thread->regs.miscRegs.readRegWithEffect(misc_reg,
+                                                   fault, this);
+}
+
+template <class Impl>
+Fault
+OzoneCPU<Impl>::OzoneXC::setMiscReg(int misc_reg, const MiscReg &val)
+{
+    // Needs to setup a squash event unless we're in syscall mode
+    Fault ret_fault = thread->regs.miscRegs.setReg(misc_reg, val);
+
+    if (!thread->inSyscall) {
+        cpu->squashFromXC();
+    }
+
+    return ret_fault;
+}
 
 template <class Impl>
-class OoODynInst;
+Fault
+OzoneCPU<Impl>::OzoneXC::setMiscRegWithEffect(int misc_reg, const MiscReg &val)
+{
+    // Needs to setup a squash event unless we're in syscall mode
+    Fault ret_fault = thread->regs.miscRegs.setRegWithEffect(misc_reg, val,
+                                                             this);
 
-struct OoOImpl {
-    typedef AlphaISA ISA;
-    typedef OoOCPU<OoOImpl> OoOCPU;
-    typedef OoOCPU FullCPU;
-    typedef OoODynInst<OoOImpl> DynInst;
-    typedef RefCountingPtr<DynInst> DynInstPtr;
-};
+    if (!thread->inSyscall) {
+        cpu->squashFromXC();
+    }
 
-#endif // __CPU_OOO_CPU_OOO_IMPL_HH__
+    return ret_fault;
+}