Pushed most of constants.hh back into isa_traits.hh and regfile.hh and created a seperate file for the syscallreturn class.

--HG--
extra : convert_revision : 9507ea1c09fda959f00aec9ec8ffb887ec8dd0f9

12 files changed, 1944 insertions, 872 deletions

diff --git a/src/arch/sparc/SConscript b/src/arch/sparc/SConscript
index e7a8278db..66f2b57e0 100644
--- a/src/arch/sparc/SConscript
+++ b/src/arch/sparc/SConscript
@@ -45,22 +45,25 @@ Import('env')
 # Base sources used by all configurations.
 base_sources = Split('''
 	faults.cc
-	isa_traits.cc
+	floatregfile.cc
+	intregfile.cc
+	miscregfile.cc
+	regfile.cc
 	''')
 
 # Full-system sources
 full_system_sources = Split('''
-	vtophys.cc
 	ua2005.cc
+	vtophys.cc
 	''')
 
 # Syscall emulation (non-full-system) sources
 syscall_emulation_sources = Split('''
 	linux/linux.cc
 	linux/process.cc
-	solaris/solaris.cc
-	solaris/process.cc
 	process.cc
+	solaris/process.cc
+	solaris/solaris.cc
 	''')
 
 sources = base_sources
diff --git a/src/arch/sparc/floatregfile.cc b/src/arch/sparc/floatregfile.cc
new file mode 100644
index 000000000..3cacbb278
--- /dev/null
+++ b/src/arch/sparc/floatregfile.cc
@@ -0,0 +1,174 @@
+/*
+ * Copyright (c) 2003-2005 The Regents of The University of Michigan
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Gabe Black
+ *          Ali Saidi
+ */
+
+#include "arch/sparc/floatregfile.hh"
+#include "base/trace.hh"
+#include "sim/byteswap.hh"
+#include "sim/serialize.hh"
+
+using namespace SparcISA;
+using namespace std;
+
+class Checkpoint;
+
+string SparcISA::getFloatRegName(RegIndex index)
+{
+    static std::string floatRegName[NumFloatRegs] =
+        {"f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",
+         "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15",
+         "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",
+         "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",
+         "f32", "f33", "f34", "f35", "f36", "f37", "f38", "f39",
+         "f40", "f41", "f42", "f43", "f44", "f45", "f46", "f47",
+         "f48", "f49", "f50", "f51", "f52", "f53", "f54", "f55",
+         "f56", "f57", "f58", "f59", "f60", "f61", "f62", "f63"};
+    return floatRegName[index];
+}
+
+void FloatRegFile::clear()
+{
+    bzero(regSpace, sizeof(regSpace));
+}
+
+FloatReg FloatRegFile::readReg(int floatReg, int width)
+{
+    //In each of these cases, we have to copy the value into a temporary
+    //variable. This is because we may otherwise try to access an
+    //unaligned portion of memory.
+    switch(width)
+    {
+      case SingleWidth:
+        float32_t result32;
+        memcpy(&result32, regSpace + 4 * floatReg, sizeof(result32));
+        return htog(result32);
+      case DoubleWidth:
+        float64_t result64;
+        memcpy(&result64, regSpace + 4 * floatReg, sizeof(result64));
+        return htog(result64);
+      case QuadWidth:
+        float128_t result128;
+        memcpy(&result128, regSpace + 4 * floatReg, sizeof(result128));
+        return htog(result128);
+      default:
+        panic("Attempted to read a %d bit floating point register!", width);
+    }
+}
+
+FloatRegBits FloatRegFile::readRegBits(int floatReg, int width)
+{
+    //In each of these cases, we have to copy the value into a temporary
+    //variable. This is because we may otherwise try to access an
+    //unaligned portion of memory.
+    switch(width)
+    {
+      case SingleWidth:
+        uint32_t result32;
+        memcpy(&result32, regSpace + 4 * floatReg, sizeof(result32));
+        return htog(result32);
+      case DoubleWidth:
+        uint64_t result64;
+        memcpy(&result64, regSpace + 4 * floatReg, sizeof(result64));
+        return htog(result64);
+      case QuadWidth:
+        uint64_t result128;
+        memcpy(&result128, regSpace + 4 * floatReg, sizeof(result128));
+        return htog(result128);
+      default:
+        panic("Attempted to read a %d bit floating point register!", width);
+    }
+}
+
+Fault FloatRegFile::setReg(int floatReg, const FloatReg &val, int width)
+{
+    //In each of these cases, we have to copy the value into a temporary
+    //variable. This is because we may otherwise try to access an
+    //unaligned portion of memory.
+
+    uint32_t result32;
+    uint64_t result64;
+    DPRINTF(Sparc, "Setting floating point register %d\n", floatReg);
+    switch(width)
+    {
+      case SingleWidth:
+        result32 = gtoh((uint32_t)val);
+        memcpy(regSpace + 4 * floatReg, &result32, sizeof(result32));
+        break;
+      case DoubleWidth:
+        result64 = gtoh((uint64_t)val);
+        memcpy(regSpace + 4 * floatReg, &result64, sizeof(result64));
+        break;
+      case QuadWidth:
+        panic("Quad width FP not implemented.");
+        break;
+      default:
+        panic("Attempted to read a %d bit floating point register!", width);
+    }
+    return NoFault;
+}
+
+Fault FloatRegFile::setRegBits(int floatReg, const FloatRegBits &val, int width)
+{
+    //In each of these cases, we have to copy the value into a temporary
+    //variable. This is because we may otherwise try to access an
+    //unaligned portion of memory.
+    uint32_t result32;
+    uint64_t result64;
+    switch(width)
+    {
+      case SingleWidth:
+        result32 = gtoh((uint32_t)val);
+        memcpy(regSpace + 4 * floatReg, &result32, sizeof(result32));
+        break;
+      case DoubleWidth:
+        result64 = gtoh((uint64_t)val);
+        memcpy(regSpace + 4 * floatReg, &result64, sizeof(result64));
+        break;
+      case QuadWidth:
+        panic("Quad width FP not implemented.");
+        break;
+      default:
+        panic("Attempted to read a %d bit floating point register!", width);
+    }
+    return NoFault;
+}
+
+void FloatRegFile::serialize(std::ostream &os)
+{
+    SERIALIZE_ARRAY((unsigned char *)regSpace,
+            SingleWidth / 8 * NumFloatRegs);
+}
+
+void FloatRegFile::unserialize(Checkpoint *cp, const std::string &section)
+{
+    UNSERIALIZE_ARRAY((unsigned char *)regSpace,
+            SingleWidth / 8 * NumFloatRegs);
+}
+
diff --git a/src/arch/sparc/floatregfile.hh b/src/arch/sparc/floatregfile.hh
new file mode 100644
index 000000000..9d760c9ff
--- /dev/null
+++ b/src/arch/sparc/floatregfile.hh
@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2003-2005 The Regents of The University of Michigan
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Gabe Black
+ *          Ali Saidi
+ */
+
+#ifndef __ARCH_SPARC_FLOATREGFILE_HH__
+#define __ARCH_SPARC_FLOATREGFILE_HH__
+
+#include "arch/sparc/faults.hh"
+#include "arch/sparc/isa_traits.hh"
+#include "arch/sparc/types.hh"
+
+#include <string>
+
+namespace SparcISA
+{
+    std::string getFloatRegName(RegIndex);
+
+    typedef float float32_t;
+    typedef double float64_t;
+    //FIXME long double refers to a 10 byte float, rather than a
+    //16 byte float as required. This data type may have to be emulated.
+    typedef double float128_t;
+
+    class FloatRegFile
+    {
+      public:
+        static const int SingleWidth = 32;
+        static const int DoubleWidth = 64;
+        static const int QuadWidth = 128;
+
+      protected:
+
+        //Since the floating point registers overlap each other,
+        //A generic storage space is used. The float to be returned is
+        //pulled from the appropriate section of this region.
+        char regSpace[(SingleWidth / 8) * NumFloatRegs];
+
+      public:
+
+        void clear();
+
+        FloatReg readReg(int floatReg, int width);
+
+        FloatRegBits readRegBits(int floatReg, int width);
+
+        Fault setReg(int floatReg, const FloatReg &val, int width);
+
+        Fault setRegBits(int floatReg, const FloatRegBits &val, int width);
+
+        void serialize(std::ostream &os);
+
+        void unserialize(Checkpoint *cp, const std::string &section);
+    };
+}
+
+#endif
diff --git a/src/arch/sparc/intregfile.cc b/src/arch/sparc/intregfile.cc
new file mode 100644
index 000000000..0cc0a886a
--- /dev/null
+++ b/src/arch/sparc/intregfile.cc
@@ -0,0 +1,133 @@
+/*
+ * Copyright (c) 2003-2005 The Regents of The University of Michigan
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Gabe Black
+ *          Ali Saidi
+ */
+
+#include "arch/sparc/intregfile.hh"
+#include "base/trace.hh"
+#include "sim/serialize.hh"
+
+using namespace SparcISA;
+using namespace std;
+
+class Checkpoint;
+
+string SparcISA::getIntRegName(RegIndex index)
+{
+    static std::string intRegName[NumIntRegs] =
+        {"g0", "g1", "g2", "g3", "g4", "g5", "g6", "g7",
+         "o0", "o1", "o2", "o3", "o4", "o5", "o6", "o7",
+         "l0", "l1", "l2", "l3", "l4", "l5", "l6", "l7",
+         "i0", "i1", "i2", "i3", "i4", "i5", "i6", "i7"};
+    return intRegName[index];
+}
+
+int IntRegFile::flattenIndex(int reg)
+{
+    int flatIndex = offset[reg >> FrameOffsetBits]
+        | (reg & FrameOffsetMask);
+    DPRINTF(Sparc, "Flattened index %d into %d.\n", reg, flatIndex);
+    return flatIndex;
+}
+
+void IntRegFile::clear()
+{
+    int x;
+    for (x = 0; x < MaxGL; x++)
+        memset(regGlobals[x], 0, sizeof(regGlobals[x]));
+    for(int x = 0; x < 2 * NWindows; x++)
+        bzero(regSegments[x], sizeof(regSegments[x]));
+}
+
+IntRegFile::IntRegFile()
+{
+    offset[Globals] = 0;
+    regView[Globals] = regGlobals[0];
+    setCWP(0);
+    clear();
+}
+
+IntReg IntRegFile::readReg(int intReg)
+{
+    IntReg val =
+        regView[intReg >> FrameOffsetBits][intReg & FrameOffsetMask];
+    DPRINTF(Sparc, "Read register %d = 0x%x\n", intReg, val);
+    return val;
+}
+
+Fault IntRegFile::setReg(int intReg, const IntReg &val)
+{
+    if(intReg)
+        DPRINTF(Sparc, "Wrote register %d = 0x%x\n", intReg, val);
+    regView[intReg >> FrameOffsetBits][intReg & FrameOffsetMask] = val;
+    return NoFault;
+}
+
+//This doesn't effect the actual CWP register.
+//It's purpose is to adjust the view of the register file
+//to what it would be if CWP = cwp.
+void IntRegFile::setCWP(int cwp)
+{
+    int index = ((NWindows - cwp) % NWindows) * 2;
+    offset[Outputs] = FrameOffset + (index * RegsPerFrame);
+    offset[Locals] = FrameOffset + ((index+1) * RegsPerFrame);
+    offset[Inputs] = FrameOffset +
+        (((index+2) % (NWindows * 2)) * RegsPerFrame);
+    regView[Outputs] = regSegments[index];
+    regView[Locals] = regSegments[index+1];
+    regView[Inputs] = regSegments[(index+2) % (NWindows * 2)];
+
+    DPRINTF(Sparc, "Changed the CWP value to %d\n", cwp);
+}
+
+void IntRegFile::setGlobals(int gl)
+{
+    DPRINTF(Sparc, "Now using %d globals", gl);
+
+    regView[Globals] = regGlobals[gl];
+    offset[Globals] = RegGlobalOffset + gl * RegsPerFrame;
+}
+
+void IntRegFile::serialize(std::ostream &os)
+{
+    unsigned int x;
+    for(x = 0; x < MaxGL; x++)
+        SERIALIZE_ARRAY(regGlobals[x], RegsPerFrame);
+    for(x = 0; x < 2 * NWindows; x++)
+        SERIALIZE_ARRAY(regSegments[x], RegsPerFrame);
+}
+
+void IntRegFile::unserialize(Checkpoint *cp, const std::string &section)
+{
+    unsigned int x;
+    for(x = 0; x < MaxGL; x++)
+        UNSERIALIZE_ARRAY(regGlobals[x], RegsPerFrame);
+    for(unsigned int x = 0; x < 2 * NWindows; x++)
+        UNSERIALIZE_ARRAY(regSegments[x], RegsPerFrame);
+}
diff --git a/src/arch/sparc/intregfile.hh b/src/arch/sparc/intregfile.hh
new file mode 100644
index 000000000..d305c753b
--- /dev/null
+++ b/src/arch/sparc/intregfile.hh
@@ -0,0 +1,103 @@
+/*
+ * Copyright (c) 2003-2005 The Regents of The University of Michigan
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Gabe Black
+ *          Ali Saidi
+ */
+
+#ifndef __ARCH_SPARC_INTREGFILE_HH__
+#define __ARCH_SPARC_INTREGFILE_HH__
+
+#include "arch/sparc/faults.hh"
+#include "arch/sparc/isa_traits.hh"
+#include "arch/sparc/types.hh"
+
+#include <string>
+
+namespace SparcISA
+{
+    class RegFile;
+
+    //This function translates integer register file indices into names
+    std::string getIntRegName(RegIndex);
+
+    class IntRegFile
+    {
+      private:
+        friend class RegFile;
+      protected:
+        static const int FrameOffsetBits = 3;
+        static const int FrameNumBits = 2;
+
+        static const int RegsPerFrame = 1 << FrameOffsetBits;
+        static const int FrameNumMask =
+                (FrameNumBits == sizeof(int)) ?
+                (unsigned int)(-1) :
+                (1 << FrameNumBits) - 1;
+        static const int FrameOffsetMask =
+                (FrameOffsetBits == sizeof(int)) ?
+                (unsigned int)(-1) :
+                (1 << FrameOffsetBits) - 1;
+
+        IntReg regGlobals[MaxGL][RegsPerFrame];
+        IntReg regSegments[2 * NWindows][RegsPerFrame];
+
+        enum regFrame {Globals, Outputs, Locals, Inputs, NumFrames};
+
+        IntReg * regView[NumFrames];
+
+        static const int RegGlobalOffset = 0;
+        static const int FrameOffset = MaxGL * RegsPerFrame;
+        int offset[NumFrames];
+
+      public:
+
+        int flattenIndex(int reg);
+
+        void clear();
+
+        IntRegFile();
+
+        IntReg readReg(int intReg);
+
+        Fault setReg(int intReg, const IntReg &val);
+
+        void serialize(std::ostream &os);
+
+        void unserialize(Checkpoint *cp, const std::string &section);
+
+      protected:
+        //This doesn't effect the actual CWP register.
+        //It's purpose is to adjust the view of the register file
+        //to what it would be if CWP = cwp.
+        void setCWP(int cwp);
+
+        void setGlobals(int gl);
+    };
+}
+
+#endif
diff --git a/src/arch/sparc/isa_traits.hh b/src/arch/sparc/isa_traits.hh
index 346f7b730..7f830eb28 100644
--- a/src/arch/sparc/isa_traits.hh
+++ b/src/arch/sparc/isa_traits.hh
@@ -25,13 +25,13 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
- * Authors: Korey Sewell
- *          Gabe Black
+ * Authors: Gabe Black
  */
 
 #ifndef __ARCH_SPARC_ISA_TRAITS_HH__
 #define __ARCH_SPARC_ISA_TRAITS_HH__
 
+#include "arch/sparc/types.hh"
 #include "base/misc.hh"
 #include "config/full_system.hh"
 #include "sim/host.hh"
@@ -46,70 +46,45 @@ class StaticInstPtr;
 
 namespace BigEndianGuest {}
 
-#if !FULL_SYSTEM
-class SyscallReturn
-{
-  public:
-    template <class T>
-    SyscallReturn(T v, bool s)
-    {
-        retval = (uint64_t)v;
-        success = s;
-    }
-
-    template <class T>
-    SyscallReturn(T v)
-    {
-        success = (v >= 0);
-        retval = (uint64_t)v;
-    }
-
-    ~SyscallReturn() {}
-
-    SyscallReturn& operator=(const SyscallReturn& s)
-    {
-        retval = s.retval;
-        success = s.success;
-        return *this;
-    }
-
-    bool successful() { return success; }
-    uint64_t value() { return retval; }
-
-    private:
-    uint64_t retval;
-    bool success;
-};
-
-#endif
-
 #if FULL_SYSTEM
 #include "arch/sparc/isa_fullsys_traits.hh"
 #endif
 
 namespace SparcISA
 {
+    class RegFile;
+
+    //This makes sure the big endian versions of certain functions are used.
+    using namespace BigEndianGuest;
+
+    //TODO this needs to be a SPARC Noop
+    // Alpha UNOP (ldq_u r31,0(r0))
+    const MachInst NoopMachInst = 0x2ffe0000;
+
+    const int NumIntRegs = 32;
+    const int NumFloatRegs = 64;
+    const int NumMiscRegs = 40;
 
     // These enumerate all the registers for dependence tracking.
     enum DependenceTags {
         // 0..31 are the integer regs 0..31
-        // 32..63 are the FP regs 0..31, i.e. use (reg + FP_Base_DepTag)
-        FP_Base_DepTag = 32,
-        Ctrl_Base_DepTag = 96,
+        // 32..95 are the FP regs 0..31, i.e. use (reg + FP_Base_DepTag)
+        FP_Base_DepTag = NumIntRegs,
+        Ctrl_Base_DepTag = NumIntRegs + NumFloatRegs,
         //XXX These are here solely to get compilation and won't work
         Fpcr_DepTag = 0,
         Uniq_DepTag = 0
     };
 
-    //This makes sure the big endian versions of certain functions are used.
-    using namespace BigEndianGuest;
 
-    typedef uint32_t MachInst;
-    typedef uint64_t ExtMachInst;
+    // MAXTL - maximum trap level
+    const int MaxPTL = 2;
+    const int MaxTL  = 6;
+    const int MaxGL  = 3;
+    const int MaxPGL = 2;
 
-    const int NumIntRegs = 32;
-    const int NumFloatRegs = 64;
-    const int NumMiscRegs = 32;
+    // NWINDOWS - number of register windows, can be 3 to 32
+    const int NWindows = 32;
 
     // semantically meaningful register indices
     const int ZeroReg = 0;	// architecturally meaningful
@@ -131,14 +106,6 @@ namespace SparcISA
     const int MaxInstSrcRegs = 8;
     const int MaxInstDestRegs = 9;
 
-    typedef uint64_t IntReg;
-
-    // control register file contents
-    typedef uint64_t MiscReg;
-
-    typedef double FloatReg;
-    typedef uint64_t FloatRegBits;
-
     //8K. This value is implmentation specific; and should probably
     //be somewhere else.
     const int LogVMPageSize = 13;
@@ -165,29 +132,4 @@ namespace SparcISA
     extern const MachInst NoopMachInst;
 }
 
-#include "arch/sparc/regfile.hh"
-
-namespace SparcISA
-{
-
-#if !FULL_SYSTEM
-    static inline void setSyscallReturn(SyscallReturn return_value,
-            RegFile *regs)
-    {
-        // check for error condition.  SPARC syscall convention is to
-        // indicate success/failure in reg the carry bit of the ccr
-        // and put the return value itself in the standard return value reg ().
-        if (return_value.successful()) {
-            // no error, clear XCC.C
-            regs->setMiscReg(MISCREG_CCR, regs->readMiscReg(MISCREG_CCR) & 0xEF);
-            regs->setIntReg(ReturnValueReg, return_value.value());
-        } else {
-            // got an error, set XCC.C
-            regs->setMiscReg(MISCREG_CCR, regs->readMiscReg(MISCREG_CCR) | 0x10);
-            regs->setIntReg(ReturnValueReg, return_value.value());
-        }
-    }
-#endif
-};
-
 #endif // __ARCH_SPARC_ISA_TRAITS_HH__
diff --git a/src/arch/sparc/miscregfile.cc b/src/arch/sparc/miscregfile.cc
new file mode 100644
index 000000000..8041e45c0
--- /dev/null
+++ b/src/arch/sparc/miscregfile.cc
@@ -0,0 +1,540 @@
+/*
+ * Copyright (c) 2003-2005 The Regents of The University of Michigan
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Gabe Black
+ *          Ali Saidi
+ */
+
+#include "arch/sparc/miscregfile.hh"
+#include "base/trace.hh"
+#include "cpu/base.hh"
+#include "cpu/thread_context.hh"
+
+using namespace SparcISA;
+using namespace std;
+
+class Checkpoint;
+
+//These functions map register indices to names
+string SparcISA::getMiscRegName(RegIndex index)
+{
+    static::string miscRegName[NumMiscRegs] =
+        {"y", "ccr", "asi", "tick", "pc", "fprs", "pcr", "pic",
+         "gsr", "softint_set", "softint_clr", "softint", "tick_cmpr",
+         "stick", "stick_cmpr",
+         "tpc", "tnpc", "tstate", "tt", "privtick", "tba", "pstate", "tl",
+         "pil", "cwp", "cansave", "canrestore", "cleanwin", "otherwin",
+         "wstate", "gl",
+         "hpstate", "htstate", "hintp", "htba", "hver", "strand_sts_reg",
+         "hstick_cmpr",
+         "fsr"};
+    return miscRegName[index];
+}
+
+#if FULL_SYSTEM
+
+//XXX These need an implementation someplace
+/** Fullsystem only register version of ReadRegWithEffect() */
+MiscReg MiscRegFile::readFSRegWithEffect(int miscReg, Fault &fault, ThreadContext *tc);
+/** Fullsystem only register version of SetRegWithEffect() */
+Fault MiscRegFile::setFSRegWithEffect(int miscReg, const MiscReg &val,
+        ThreadContext * tc);
+#endif
+
+void MiscRegFile::reset()
+{
+    pstateFields.pef = 0; //No FPU
+    //pstateFields.pef = 1; //FPU
+#if FULL_SYSTEM
+    //For SPARC, when a system is first started, there is a power
+    //on reset Trap which sets the processor into the following state.
+    //Bits that aren't set aren't defined on startup.
+    tl = MaxTL;
+    gl = MaxGL;
+
+    tickFields.counter = 0; //The TICK register is unreadable bya
+    tickFields.npt = 1; //The TICK register is unreadable by by !priv
+
+    softint = 0; // Clear all the soft interrupt bits
+    tick_cmprFields.int_dis = 1; // disable timer compare interrupts
+    tick_cmprFields.tick_cmpr = 0; // Reset to 0 for pretty printing
+    stickFields.npt = 1; //The TICK register is unreadable by by !priv
+    stick_cmprFields.int_dis = 1; // disable timer compare interrupts
+    stick_cmprFields.tick_cmpr = 0; // Reset to 0 for pretty printing
+
+
+    tt[tl] = power_on_reset;
+    pstate = 0; // fields 0 but pef
+    pstateFields.pef = 1;
+
+    hpstate = 0;
+    hpstateFields.red = 1;
+    hpstateFields.hpriv = 1;
+    hpstateFields.tlz = 0; // this is a guess
+    hintp = 0; // no interrupts pending
+    hstick_cmprFields.int_dis = 1; // disable timer compare interrupts
+    hstick_cmprFields.tick_cmpr = 0; // Reset to 0 for pretty printing
+#else
+/*	    //This sets up the initial state of the processor for usermode processes
+    pstateFields.priv = 0; //Process runs in user mode
+    pstateFields.ie = 1; //Interrupts are enabled
+    fsrFields.rd = 0; //Round to nearest
+    fsrFields.tem = 0; //Floating point traps not enabled
+    fsrFields.ns = 0; //Non standard mode off
+    fsrFields.qne = 0; //Floating point queue is empty
+    fsrFields.aexc = 0; //No accrued exceptions
+    fsrFields.cexc = 0; //No current exceptions
+
+    //Register window management registers
+    otherwin = 0; //No windows contain info from other programs
+    canrestore = 0; //There are no windows to pop
+    cansave = MaxTL - 2; //All windows are available to save into
+    cleanwin = MaxTL;*/
+#endif
+}
+
+MiscReg MiscRegFile::readReg(int miscReg)
+{
+    switch (miscReg) {
+        case MISCREG_Y:
+          return y;
+        case MISCREG_CCR:
+          return ccr;
+        case MISCREG_ASI:
+          return asi;
+        case MISCREG_FPRS:
+          return fprs;
+        case MISCREG_TICK:
+           return tick;
+        case MISCREG_PCR:
+        case MISCREG_PIC:
+          panic("ASR number %d not implemented\n", miscReg - AsrStart);
+        case MISCREG_GSR:
+          return gsr;
+        case MISCREG_SOFTINT:
+           return softint;
+        case MISCREG_TICK_CMPR:
+           return tick_cmpr;
+        case MISCREG_STICK:
+           return stick;
+        case MISCREG_STICK_CMPR:
+           return stick_cmpr;
+
+        /** Privilged Registers */
+        case MISCREG_TPC:
+          return tpc[tl-1];
+        case MISCREG_TNPC:
+          return tnpc[tl-1];
+        case MISCREG_TSTATE:
+          return tstate[tl-1];
+        case MISCREG_TT:
+          return tt[tl-1];
+        case MISCREG_PRIVTICK:
+          panic("Priviliged access to tick registers not implemented\n");
+        case MISCREG_TBA:
+          return tba;
+        case MISCREG_PSTATE:
+          return pstate;
+        case MISCREG_TL:
+          return tl;
+        case MISCREG_PIL:
+          return pil;
+        case MISCREG_CWP:
+          return cwp;
+        case MISCREG_CANSAVE:
+          return cansave;
+        case MISCREG_CANRESTORE:
+          return canrestore;
+        case MISCREG_CLEANWIN:
+          return cleanwin;
+        case MISCREG_OTHERWIN:
+          return otherwin;
+        case MISCREG_WSTATE:
+          return wstate;
+        case MISCREG_GL:
+          return gl;
+
+        /** Hyper privileged registers */
+        case MISCREG_HPSTATE:
+          return hpstate;
+        case MISCREG_HTSTATE:
+          return htstate[tl-1];
+        case MISCREG_HINTP:
+          panic("HINTP not implemented\n");
+        case MISCREG_HTBA:
+          return htba;
+        case MISCREG_HVER:
+          return NWindows | MaxTL << 8 | MaxGL << 16;
+        case MISCREG_STRAND_STS_REG:
+          return strandStatusReg;
+        case MISCREG_HSTICK_CMPR:
+          return hstick_cmpr;
+
+        /** Floating Point Status Register */
+        case MISCREG_FSR:
+          return fsr;
+        default:
+          panic("Miscellaneous register %d not implemented\n", miscReg);
+    }
+}
+
+MiscReg MiscRegFile::readRegWithEffect(int miscReg,
+        Fault &fault, ThreadContext * tc)
+{
+    fault = NoFault;
+    switch (miscReg) {
+        case MISCREG_Y:
+        case MISCREG_CCR:
+        case MISCREG_ASI:
+          return readReg(miscReg);
+
+        case MISCREG_TICK:
+        case MISCREG_PRIVTICK:
+          // Check  for reading privilege
+          if (tickFields.npt && !isNonPriv()) {
+              fault = new PrivilegedAction;
+              return 0;
+          }
+          return tc->getCpuPtr()->curCycle() - tickFields.counter |
+              tickFields.npt << 63;
+        case MISCREG_PC:
+          return tc->readPC();
+        case MISCREG_FPRS:
+          fault = new UnimpFault("FPU not implemented\n");
+          return 0;
+        case MISCREG_PCR:
+          fault = new UnimpFault("Performance Instrumentation not impl\n");
+          return 0;
+        case MISCREG_PIC:
+          fault = new UnimpFault("Performance Instrumentation not impl\n");
+          return 0;
+        case MISCREG_GSR:
+          return readReg(miscReg);
+
+        /** Privilged Registers */
+        case MISCREG_TPC:
+        case MISCREG_TNPC:
+        case MISCREG_TSTATE:
+        case MISCREG_TT:
+          if (tl == 0) {
+              fault = new IllegalInstruction;
+              return 0;
+          } // NOTE THE FALL THROUGH!
+        case MISCREG_PSTATE:
+        case MISCREG_TL:
+          return readReg(miscReg);
+
+        case MISCREG_TBA:
+          return readReg(miscReg) & ULL(~0x7FFF);
+
+        case MISCREG_PIL:
+
+        case MISCREG_CWP:
+        case MISCREG_CANSAVE:
+        case MISCREG_CANRESTORE:
+        case MISCREG_CLEANWIN:
+        case MISCREG_OTHERWIN:
+        case MISCREG_WSTATE:
+        case MISCREG_GL:
+          return readReg(miscReg);
+
+        /** Floating Point Status Register */
+        case MISCREG_FSR:
+          panic("Floating Point not implemented\n");
+        default:
+#if FULL_SYSTEM
+          return readFSRegWithEffect(miscReg, fault, tc);
+#else
+          fault = new IllegalInstruction;
+          return 0;
+#endif
+    }
+}
+
+Fault MiscRegFile::setReg(int miscReg, const MiscReg &val)
+{
+    switch (miscReg) {
+        case MISCREG_Y:
+          y = val;
+          return NoFault;
+        case MISCREG_CCR:
+          ccr = val;
+          return NoFault;
+        case MISCREG_ASI:
+          asi = val;
+          return NoFault;
+        case MISCREG_FPRS:
+          fprs = val;
+          return NoFault;
+        case MISCREG_TICK:
+           tick = val;
+          return NoFault;
+        case MISCREG_PCR:
+        case MISCREG_PIC:
+          panic("ASR number %d not implemented\n", miscReg - AsrStart);
+        case MISCREG_GSR:
+          gsr = val;
+        case MISCREG_SOFTINT:
+           softint = val;
+          return NoFault;
+        case MISCREG_TICK_CMPR:
+           tick_cmpr = val;
+          return NoFault;
+        case MISCREG_STICK:
+           stick = val;
+          return NoFault;
+        case MISCREG_STICK_CMPR:
+           stick_cmpr = val;
+          return NoFault;
+
+        /** Privilged Registers */
+        case MISCREG_TPC:
+          tpc[tl-1] = val;
+          return NoFault;
+        case MISCREG_TNPC:
+          tnpc[tl-1] = val;
+          return NoFault;
+        case MISCREG_TSTATE:
+          tstate[tl-1] = val;
+          return NoFault;
+        case MISCREG_TT:
+          tt[tl-1] = val;
+          return NoFault;
+        case MISCREG_PRIVTICK:
+          panic("Priviliged access to tick regesiters not implemented\n");
+        case MISCREG_TBA:
+          tba = val;
+          return NoFault;
+        case MISCREG_PSTATE:
+          pstate = val;
+          return NoFault;
+        case MISCREG_TL:
+          tl = val;
+          return NoFault;
+        case MISCREG_PIL:
+          pil = val;
+          return NoFault;
+        case MISCREG_CWP:
+          cwp = val;
+          return NoFault;
+        case MISCREG_CANSAVE:
+          cansave = val;
+          return NoFault;
+        case MISCREG_CANRESTORE:
+          canrestore = val;
+          return NoFault;
+        case MISCREG_CLEANWIN:
+          cleanwin = val;
+          return NoFault;
+        case MISCREG_OTHERWIN:
+          otherwin = val;
+          return NoFault;
+        case MISCREG_WSTATE:
+          wstate = val;
+          return NoFault;
+        case MISCREG_GL:
+          gl = val;
+          return NoFault;
+
+        /** Hyper privileged registers */
+        case MISCREG_HPSTATE:
+          hpstate = val;
+          return NoFault;
+        case MISCREG_HTSTATE:
+          htstate[tl-1] = val;
+          return NoFault;
+        case MISCREG_HINTP:
+          panic("HINTP not implemented\n");
+        case MISCREG_HTBA:
+          htba = val;
+          return NoFault;
+        case MISCREG_STRAND_STS_REG:
+          strandStatusReg = val;
+          return NoFault;
+        case MISCREG_HSTICK_CMPR:
+          hstick_cmpr = val;
+          return NoFault;
+
+        /** Floating Point Status Register */
+        case MISCREG_FSR:
+          fsr = val;
+          return NoFault;
+        default:
+          panic("Miscellaneous register %d not implemented\n", miscReg);
+    }
+}
+
+Fault MiscRegFile::setRegWithEffect(int miscReg,
+        const MiscReg &val, ThreadContext * tc)
+{
+    const uint64_t Bit64 = (1ULL << 63);
+    switch (miscReg) {
+        case MISCREG_Y:
+        case MISCREG_CCR:
+        case MISCREG_ASI:
+          setReg(miscReg, val);
+          return NoFault;
+        case MISCREG_PRIVTICK:
+        case MISCREG_TICK:
+          if (isNonPriv())
+              return new PrivilegedOpcode;
+          if (isPriv())
+              return new PrivilegedAction;
+          tickFields.counter = tc->getCpuPtr()->curCycle() - val  & ~Bit64;
+          tickFields.npt = val & Bit64 ? 1 : 0;
+           return NoFault;
+        case MISCREG_PC:
+           return new IllegalInstruction;
+        case MISCREG_FPRS:
+           return new UnimpFault("FPU not implemented\n");
+        case MISCREG_PCR:
+           return new UnimpFault("Performance Instrumentation not impl\n");
+        case MISCREG_PIC:
+           return new UnimpFault("Performance Instrumentation not impl\n");
+        case MISCREG_GSR:
+           return setReg(miscReg, val);
+
+        /** Privilged Registers */
+        case MISCREG_TPC:
+        case MISCREG_TNPC:
+        case MISCREG_TSTATE:
+        case MISCREG_TT:
+          if (tl == 0)
+              return new IllegalInstruction;
+          setReg(miscReg, val);
+          return NoFault;
+
+        case MISCREG_TBA:
+          // clear lower 7 bits on writes.
+          setReg(miscReg, val & ULL(~0x7FFF));
+          return NoFault;
+
+        case MISCREG_PSTATE:
+          setReg(miscReg, val);
+          return NoFault;
+
+        case MISCREG_TL:
+          if (isHyperPriv() && val > MaxTL)
+              setReg(miscReg, MaxTL);
+          else if (isPriv() && !isHyperPriv() && val > MaxPTL)
+              setReg(miscReg, MaxPTL);
+          else
+              setReg(miscReg, val);
+          return NoFault;
+
+        case MISCREG_CWP:
+          tc->changeRegFileContext(CONTEXT_CWP, val);
+        case MISCREG_CANSAVE:
+        case MISCREG_CANRESTORE:
+        case MISCREG_CLEANWIN:
+        case MISCREG_OTHERWIN:
+        case MISCREG_WSTATE:
+          setReg(miscReg, val);
+          return NoFault;
+
+        case MISCREG_GL:
+          int newval;
+          if (isHyperPriv() && val > MaxGL)
+              newval = MaxGL;
+          else if (isPriv() && !isHyperPriv() && val > MaxPGL)
+              newval =  MaxPGL;
+          else
+              newval = val;
+          tc->changeRegFileContext(CONTEXT_GLOBALS, newval);
+          setReg(miscReg, newval);
+          return NoFault;
+
+        /** Floating Point Status Register */
+        case MISCREG_FSR:
+          panic("Floating Point not implemented\n");
+        default:
+#if FULL_SYSTEM
+              setFSRegWithEffect(miscReg, val, tc);
+#else
+              return new IllegalInstruction;
+#endif
+    }
+}
+
+void MiscRegFile::serialize(std::ostream & os)
+{
+    SERIALIZE_SCALAR(pstate);
+    SERIALIZE_SCALAR(tba);
+    SERIALIZE_SCALAR(y);
+    SERIALIZE_SCALAR(pil);
+    SERIALIZE_SCALAR(gl);
+    SERIALIZE_SCALAR(cwp);
+    SERIALIZE_ARRAY(tt, MaxTL);
+    SERIALIZE_SCALAR(ccr);
+    SERIALIZE_SCALAR(asi);
+    SERIALIZE_SCALAR(tl);
+    SERIALIZE_ARRAY(tpc, MaxTL);
+    SERIALIZE_ARRAY(tnpc, MaxTL);
+    SERIALIZE_ARRAY(tstate, MaxTL);
+    SERIALIZE_SCALAR(tick);
+    SERIALIZE_SCALAR(cansave);
+    SERIALIZE_SCALAR(canrestore);
+    SERIALIZE_SCALAR(otherwin);
+    SERIALIZE_SCALAR(cleanwin);
+    SERIALIZE_SCALAR(wstate);
+    SERIALIZE_SCALAR(fsr);
+    SERIALIZE_SCALAR(fprs);
+    SERIALIZE_SCALAR(hpstate);
+    SERIALIZE_ARRAY(htstate, MaxTL);
+    SERIALIZE_SCALAR(htba);
+    SERIALIZE_SCALAR(hstick_cmpr);
+}
+
+void MiscRegFile::unserialize(Checkpoint * cp, const std::string & section)
+{
+    UNSERIALIZE_SCALAR(pstate);
+    UNSERIALIZE_SCALAR(tba);
+    UNSERIALIZE_SCALAR(y);
+    UNSERIALIZE_SCALAR(pil);
+    UNSERIALIZE_SCALAR(gl);
+    UNSERIALIZE_SCALAR(cwp);
+    UNSERIALIZE_ARRAY(tt, MaxTL);
+    UNSERIALIZE_SCALAR(ccr);
+    UNSERIALIZE_SCALAR(asi);
+    UNSERIALIZE_SCALAR(tl);
+    UNSERIALIZE_ARRAY(tpc, MaxTL);
+    UNSERIALIZE_ARRAY(tnpc, MaxTL);
+    UNSERIALIZE_ARRAY(tstate, MaxTL);
+    UNSERIALIZE_SCALAR(tick);
+    UNSERIALIZE_SCALAR(cansave);
+    UNSERIALIZE_SCALAR(canrestore);
+    UNSERIALIZE_SCALAR(otherwin);
+    UNSERIALIZE_SCALAR(cleanwin);
+    UNSERIALIZE_SCALAR(wstate);
+    UNSERIALIZE_SCALAR(fsr);
+    UNSERIALIZE_SCALAR(fprs);
+    UNSERIALIZE_SCALAR(hpstate);
+    UNSERIALIZE_ARRAY(htstate, MaxTL);
+    UNSERIALIZE_SCALAR(htba);
+    UNSERIALIZE_SCALAR(hstick_cmpr);
+}
+
diff --git a/src/arch/sparc/miscregfile.hh b/src/arch/sparc/miscregfile.hh
new file mode 100644
index 000000000..be143311f
--- /dev/null
+++ b/src/arch/sparc/miscregfile.hh
@@ -0,0 +1,410 @@
+/*
+ * Copyright (c) 2003-2005 The Regents of The University of Michigan
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Gabe Black
+ *          Ali Saidi
+ */
+
+#ifndef __ARCH_SPARC_MISCREGFILE_HH__
+#define __ARCH_SPARC_MISCREGFILE_HH__
+
+#include "arch/sparc/faults.hh"
+#include "arch/sparc/isa_traits.hh"
+#include "arch/sparc/types.hh"
+
+#include <string>
+
+namespace SparcISA
+{
+
+    //These functions map register indices to names
+    std::string getMiscRegName(RegIndex);
+
+    const int AsrStart = 0;
+    const int PrStart = 32;
+    const int HprStart = 64;
+    const int MiscStart = 96;
+
+    enum MiscRegIndex
+    {
+        /** Ancillary State Registers */
+        MISCREG_Y  = AsrStart + 0,
+        MISCREG_CCR = AsrStart + 2,
+        MISCREG_ASI = AsrStart + 3,
+        MISCREG_TICK = AsrStart + 4,
+        MISCREG_PC = AsrStart + 5,
+        MISCREG_FPRS = AsrStart + 6,
+        MISCREG_PCR = AsrStart + 16,
+        MISCREG_PIC = AsrStart + 17,
+        MISCREG_GSR = AsrStart + 19,
+        MISCREG_SOFTINT_SET = AsrStart + 20,
+        MISCREG_SOFTINT_CLR = AsrStart + 21,
+        MISCREG_SOFTINT = AsrStart + 22,
+        MISCREG_TICK_CMPR = AsrStart + 23,
+        MISCREG_STICK = AsrStart + 24,
+        MISCREG_STICK_CMPR = AsrStart + 25,
+
+        /** Privilged Registers */
+        MISCREG_TPC = PrStart + 0,
+        MISCREG_TNPC = PrStart + 1,
+        MISCREG_TSTATE = PrStart + 2,
+        MISCREG_TT = PrStart + 3,
+        MISCREG_PRIVTICK = PrStart + 4,
+        MISCREG_TBA = PrStart + 5,
+        MISCREG_PSTATE = PrStart + 6,
+        MISCREG_TL = PrStart + 7,
+        MISCREG_PIL = PrStart + 8,
+        MISCREG_CWP = PrStart + 9,
+        MISCREG_CANSAVE = PrStart + 10,
+        MISCREG_CANRESTORE = PrStart + 11,
+        MISCREG_CLEANWIN = PrStart + 12,
+        MISCREG_OTHERWIN = PrStart + 13,
+        MISCREG_WSTATE = PrStart + 14,
+        MISCREG_GL = PrStart + 16,
+
+        /** Hyper privileged registers */
+        MISCREG_HPSTATE = HprStart + 0,
+        MISCREG_HTSTATE = HprStart + 1,
+        MISCREG_HINTP = HprStart + 3,
+        MISCREG_HTBA = HprStart + 5,
+        MISCREG_HVER = HprStart + 6,
+        MISCREG_STRAND_STS_REG = HprStart + 16,
+        MISCREG_HSTICK_CMPR = HprStart + 31,
+
+        /** Floating Point Status Register */
+        MISCREG_FSR = MiscStart + 0
+
+    };
+
+    // The control registers, broken out into fields
+    class MiscRegFile
+    {
+      private:
+
+        /* ASR Registers */
+        union {
+            uint64_t y;		// Y (used in obsolete multiplication)
+            struct {
+                uint64_t value:32;	// The actual value stored in y
+                uint64_t :32;	// reserved bits
+            } yFields;
+        };
+        union {
+            uint8_t	ccr;		// Condition Code Register
+            struct {
+                union {
+                    uint8_t icc:4;	// 32-bit condition codes
+                    struct {
+                        uint8_t c:1;	// Carry
+                        uint8_t v:1;	// Overflow
+                        uint8_t z:1;	// Zero
+                        uint8_t n:1;	// Negative
+                    } iccFields;
+                };
+                union {
+                    uint8_t xcc:4;	// 64-bit condition codes
+                    struct {
+                        uint8_t c:1;	// Carry
+                        uint8_t v:1;	// Overflow
+                        uint8_t z:1;	// Zero
+                        uint8_t n:1;	// Negative
+                    } xccFields;
+                };
+            } ccrFields;
+        };
+        uint8_t asi;		// Address Space Identifier
+        union {
+            uint64_t tick;		// Hardware clock-tick counter
+            struct {
+                int64_t counter:63;	// Clock-tick count
+                uint64_t npt:1;		// Non-priveleged trap
+            } tickFields;
+        };
+        union {
+            uint8_t		fprs;	// Floating-Point Register State
+            struct {
+                uint8_t dl:1;		// Dirty lower
+                uint8_t du:1;		// Dirty upper
+                uint8_t fef:1;		// FPRS enable floating-Point
+            } fprsFields;
+        };
+        union {
+            uint64_t gsr;		//General Status Register
+            struct {
+                uint64_t mask:32;
+                uint64_t :4;
+                uint64_t im:1;
+                uint64_t irnd:2;
+                uint64_t :17;
+                uint64_t scale:5;
+                uint64_t align:3;
+            } gsrFields;
+        };
+        union {
+            uint64_t softint;
+            struct {
+                uint64_t tm:1;
+                uint64_t int_level:14;
+                uint64_t sm:1;
+            } softintFields;
+        };
+        union {
+            uint64_t tick_cmpr;		// Hardware tick compare registers
+            struct {
+                uint64_t tick_cmpr:63;	// Clock-tick count
+                uint64_t int_dis:1;		// Non-priveleged trap
+            } tick_cmprFields;
+        };
+        union {
+            uint64_t stick;		// Hardware clock-tick counter
+            struct {
+                int64_t :63;	// Not used, storage in SparcSystem
+                uint64_t npt:1;		// Non-priveleged trap
+            } stickFields;
+        };
+        union {
+            uint64_t stick_cmpr;		// Hardware tick compare registers
+            struct {
+                uint64_t tick_cmpr:63;	// Clock-tick count
+                uint64_t int_dis:1;		// Non-priveleged trap
+            } stick_cmprFields;
+        };
+
+
+        /* Privileged Registers */
+        uint64_t tpc[MaxTL];	// Trap Program Counter (value from
+                                // previous trap level)
+        uint64_t tnpc[MaxTL];	// Trap Next Program Counter (value from
+                                // previous trap level)
+        union {
+            uint64_t tstate[MaxTL];	// Trap State
+            struct {
+                //Values are from previous trap level
+                uint64_t cwp:5;		// Current Window Pointer
+                uint64_t :3;	// Reserved bits
+                uint64_t pstate:13;	// Process State
+                uint64_t :3;	// Reserved bits
+                uint64_t asi:8;		// Address Space Identifier
+                uint64_t ccr:8;		// Condition Code Register
+                uint64_t gl:8;		// Global level
+            } tstateFields[MaxTL];
+        };
+        uint16_t tt[MaxTL];	// Trap Type (Type of trap which occured
+                                // on the previous level)
+        uint64_t tba;		// Trap Base Address
+
+        union {
+            uint16_t pstate;		// Process State Register
+            struct {
+                uint16_t :1;		// reserved
+                uint16_t ie:1;		// Interrupt enable
+                uint16_t priv:1;	// Privelege mode
+                uint16_t am:1;		// Address mask
+                uint16_t pef:1;		// PSTATE enable floating-point
+                uint16_t :1;		// reserved2
+                uint16_t mm:2;		// Memory Model
+                uint16_t tle:1;		// Trap little-endian
+                uint16_t cle:1;		// Current little-endian
+            } pstateFields;
+        };
+        uint8_t tl;		// Trap Level
+        uint8_t pil;		// Process Interrupt Register
+        uint8_t cwp;		// Current Window Pointer
+        uint8_t cansave;	// Savable windows
+        uint8_t canrestore;	// Restorable windows
+        uint8_t cleanwin;	// Clean windows
+        uint8_t otherwin;	// Other windows
+        union {
+            uint8_t wstate;		// Window State
+            struct {
+                uint8_t normal:3;	// Bits TT<4:2> are set to on a normal
+                                        // register window trap
+                uint8_t other:3;	// Bits TT<4:2> are set to on an "otherwin"
+                                        // register window trap
+            } wstateFields;
+        };
+        uint8_t gl;             // Global level register
+
+
+        /** Hyperprivileged Registers */
+        union {
+            uint64_t hpstate; // Hyperprivileged State Register
+            struct {
+                uint8_t tlz: 1;
+                uint8_t :1;
+                uint8_t hpriv:1;
+                uint8_t :2;
+                uint8_t red:1;
+                uint8_t :4;
+                uint8_t ibe:1;
+                uint8_t id:1;
+            } hpstateFields;
+        };
+
+        uint64_t htstate[MaxTL]; // Hyperprivileged Trap State Register
+        uint64_t hintp;
+        uint64_t htba; // Hyperprivileged Trap Base Address register
+        union {
+            uint64_t hstick_cmpr;		// Hardware tick compare registers
+            struct {
+                uint64_t tick_cmpr:63;	// Clock-tick count
+                uint64_t int_dis:1;		// Non-priveleged trap
+            } hstick_cmprFields;
+        };
+
+        uint64_t strandStatusReg; // Per strand status register
+
+
+        /** Floating point misc registers. */
+        union {
+            uint64_t	fsr;	// Floating-Point State Register
+            struct {
+                union {
+                    uint64_t cexc:5;	// Current excpetion
+                    struct {
+                        uint64_t nxc:1;		// Inexact
+                        uint64_t dzc:1;		// Divide by zero
+                        uint64_t ufc:1;		// Underflow
+                        uint64_t ofc:1;		// Overflow
+                        uint64_t nvc:1;		// Invalid operand
+                    } cexcFields;
+                };
+                union {
+                    uint64_t aexc:5;		// Accrued exception
+                    struct {
+                        uint64_t nxc:1;		// Inexact
+                        uint64_t dzc:1;		// Divide by zero
+                        uint64_t ufc:1;		// Underflow
+                        uint64_t ofc:1;		// Overflow
+                        uint64_t nvc:1;		// Invalid operand
+                    } aexcFields;
+                };
+                uint64_t fcc0:2;		// Floating-Point condtion codes
+                uint64_t :1;		// Reserved bits
+                uint64_t qne:1;			// Deferred trap queue not empty
+                                                // with no queue, it should read 0
+                uint64_t ftt:3;			// Floating-Point trap type
+                uint64_t ver:3;			// Version (of the FPU)
+                uint64_t :2;		// Reserved bits
+                uint64_t ns:1;			// Nonstandard floating point
+                union {
+                    uint64_t tem:5;			// Trap Enable Mask
+                    struct {
+                        uint64_t nxm:1;		// Inexact
+                        uint64_t dzm:1;		// Divide by zero
+                        uint64_t ufm:1;		// Underflow
+                        uint64_t ofm:1;		// Overflow
+                        uint64_t nvm:1;		// Invalid operand
+                    } temFields;
+                };
+                uint64_t :2;		// Reserved bits
+                uint64_t rd:2;			// Rounding direction
+                uint64_t fcc1:2;		// Floating-Point condition codes
+                uint64_t fcc2:2;		// Floating-Point condition codes
+                uint64_t fcc3:2;		// Floating-Point condition codes
+                uint64_t :26;		// Reserved bits
+            } fsrFields;
+        };
+
+        // These need to check the int_dis field and if 0 then
+        // set appropriate bit in softint and checkinterrutps on the cpu
+#if FULL_SYSTEM
+        /** Process a tick compare event and generate an interrupt on the cpu if
+         * appropriate. */
+        void processTickCompare(ThreadContext *tc);
+        void processSTickCompare(ThreadContext *tc);
+        void processHSTickCompare(ThreadContext *tc);
+
+        typedef CpuEventWrapper<MiscRegFile,
+                &MiscRegFile::processTickCompare> TickCompareEvent;
+        TickCompareEvent *tickCompare;
+
+        typedef CpuEventWrapper<MiscRegFile,
+                &MiscRegFile::processSTickCompare> STickCompareEvent;
+        STickCompareEvent *sTickCompare;
+
+        typedef CpuEventWrapper<MiscRegFile,
+                &MiscRegFile::processHSTickCompare> HSTickCompareEvent;
+        HSTickCompareEvent *hSTickCompare;
+
+        /** Fullsystem only register version of ReadRegWithEffect() */
+        MiscReg readFSRegWithEffect(int miscReg, Fault &fault, ThreadContext *tc);
+        /** Fullsystem only register version of SetRegWithEffect() */
+        Fault setFSRegWithEffect(int miscReg, const MiscReg &val,
+                ThreadContext * tc);
+#endif
+      public:
+
+        void reset();
+
+        MiscRegFile()
+        {
+            reset();
+        }
+
+        /** read a value out of an either an SE or FS IPR. No checking is done
+         * about SE vs. FS as this is mostly used to copy the regfile. Thus more
+         * register are copied that are necessary for FS. However this prevents
+         * a bunch of ifdefs and is rarely called so is not performance
+         * criticial. */
+        MiscReg readReg(int miscReg);
+
+        /** Read a value from an IPR. Only the SE iprs are here and the rest
+         * are are readFSRegWithEffect (which is called by readRegWithEffect()).
+         * Checking is done for permission based on state bits in the miscreg
+         * file. */
+        MiscReg readRegWithEffect(int miscReg, Fault &fault, ThreadContext *tc);
+
+        /** write a value into an either an SE or FS IPR. No checking is done
+         * about SE vs. FS as this is mostly used to copy the regfile. Thus more
+         * register are copied that are necessary for FS. However this prevents
+         * a bunch of ifdefs and is rarely called so is not performance
+         * criticial.*/
+        Fault setReg(int miscReg, const MiscReg &val);
+
+        /** Write a value into an IPR. Only the SE iprs are here and the rest
+         * are are setFSRegWithEffect (which is called by setRegWithEffect()).
+         * Checking is done for permission based on state bits in the miscreg
+         * file. */
+        Fault setRegWithEffect(int miscReg,
+                const MiscReg &val, ThreadContext * tc);
+
+        void serialize(std::ostream & os);
+
+        void unserialize(Checkpoint * cp, const std::string & section);
+
+        void copyMiscRegs(ThreadContext * tc);
+
+      protected:
+
+        bool isHyperPriv() { return hpstateFields.hpriv; }
+        bool isPriv() { return hpstateFields.hpriv || pstateFields.priv; }
+        bool isNonPriv() { return !isPriv(); }
+    };
+}
+
+#endif
diff --git a/src/arch/sparc/regfile.cc b/src/arch/sparc/regfile.cc
new file mode 100644
index 000000000..747426781
--- /dev/null
+++ b/src/arch/sparc/regfile.cc
@@ -0,0 +1,279 @@
+/*
+ * Copyright (c) 2003-2005 The Regents of The University of Michigan
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Gabe Black
+ *          Ali Saidi
+ */
+
+#include "arch/sparc/regfile.hh"
+#include "cpu/thread_context.hh"
+
+class Checkpoint;
+
+using namespace SparcISA;
+using namespace std;
+
+//RegFile class methods
+Addr RegFile::readPC()
+{
+    return pc;
+}
+
+void RegFile::setPC(Addr val)
+{
+    pc = val;
+}
+
+Addr RegFile::readNextPC()
+{
+    return npc;
+}
+
+void RegFile::setNextPC(Addr val)
+{
+    npc = val;
+}
+
+Addr RegFile::readNextNPC()
+{
+    return nnpc;
+}
+
+void RegFile::setNextNPC(Addr val)
+{
+    nnpc = val;
+}
+
+void RegFile::clear()
+{
+    intRegFile.clear();
+    floatRegFile.clear();
+}
+
+MiscReg RegFile::readMiscReg(int miscReg)
+{
+    return miscRegFile.readReg(miscReg);
+}
+
+MiscReg RegFile::readMiscRegWithEffect(int miscReg,
+        Fault &fault, ThreadContext *tc)
+{
+    return miscRegFile.readRegWithEffect(miscReg, fault, tc);
+}
+
+Fault RegFile::setMiscReg(int miscReg, const MiscReg &val)
+{
+    return miscRegFile.setReg(miscReg, val);
+}
+
+Fault RegFile::setMiscRegWithEffect(int miscReg, const MiscReg &val,
+        ThreadContext * tc)
+{
+    return miscRegFile.setRegWithEffect(miscReg, val, tc);
+}
+
+FloatReg RegFile::readFloatReg(int floatReg, int width)
+{
+    return floatRegFile.readReg(floatReg, width);
+}
+
+FloatReg RegFile::readFloatReg(int floatReg)
+{
+    //Use the "natural" width of a single float
+    return floatRegFile.readReg(floatReg, FloatRegFile::SingleWidth);
+}
+
+FloatRegBits RegFile::readFloatRegBits(int floatReg, int width)
+{
+    return floatRegFile.readRegBits(floatReg, width);
+}
+
+FloatRegBits RegFile::readFloatRegBits(int floatReg)
+{
+    //Use the "natural" width of a single float
+    return floatRegFile.readRegBits(floatReg,
+            FloatRegFile::SingleWidth);
+}
+
+Fault RegFile::setFloatReg(int floatReg, const FloatReg &val, int width)
+{
+    return floatRegFile.setReg(floatReg, val, width);
+}
+
+Fault RegFile::setFloatReg(int floatReg, const FloatReg &val)
+{
+    //Use the "natural" width of a single float
+    return setFloatReg(floatReg, val, FloatRegFile::SingleWidth);
+}
+
+Fault RegFile::setFloatRegBits(int floatReg, const FloatRegBits &val, int width)
+{
+    return floatRegFile.setRegBits(floatReg, val, width);
+}
+
+Fault RegFile::setFloatRegBits(int floatReg, const FloatRegBits &val)
+{
+    //Use the "natural" width of a single float
+    return floatRegFile.setRegBits(floatReg, val,
+            FloatRegFile::SingleWidth);
+}
+
+IntReg RegFile::readIntReg(int intReg)
+{
+    return intRegFile.readReg(intReg);
+}
+
+Fault RegFile::setIntReg(int intReg, const IntReg &val)
+{
+    return intRegFile.setReg(intReg, val);
+}
+
+void RegFile::serialize(std::ostream &os)
+{
+    intRegFile.serialize(os);
+    floatRegFile.serialize(os);
+    miscRegFile.serialize(os);
+    SERIALIZE_SCALAR(pc);
+    SERIALIZE_SCALAR(npc);
+}
+
+void RegFile::unserialize(Checkpoint *cp, const std::string &section)
+{
+    intRegFile.unserialize(cp, section);
+    floatRegFile.unserialize(cp, section);
+    miscRegFile.unserialize(cp, section);
+    UNSERIALIZE_SCALAR(pc);
+    UNSERIALIZE_SCALAR(npc);
+}
+
+void RegFile::changeContext(RegContextParam param, RegContextVal val)
+{
+    switch(param)
+    {
+      case CONTEXT_CWP:
+        intRegFile.setCWP(val);
+        break;
+      case CONTEXT_GLOBALS:
+        intRegFile.setGlobals(val);
+        break;
+      default:
+        panic("Tried to set illegal context parameter in the SPARC regfile.\n");
+    }
+}
+
+int SparcISA::InterruptLevel(uint64_t softint)
+{
+    if (softint & 0x10000 || softint & 0x1)
+        return 14;
+
+    int level = 14;
+    while (level >= 0 && !(1 << (level + 1) & softint))
+        level--;
+    if (1 << (level + 1) & softint)
+        return level;
+    return 0;
+}
+
+void SparcISA::copyMiscRegs(ThreadContext *src, ThreadContext *dest)
+{
+
+    uint8_t tl = src->readMiscReg(MISCREG_TL);
+
+    // Read all the trap level dependent registers and save them off
+    for(int i = 1; i <= MaxTL; i++)
+    {
+        src->setMiscReg(MISCREG_TL, i);
+        dest->setMiscReg(MISCREG_TL, i);
+
+        dest->setMiscReg(MISCREG_TT, src->readMiscReg(MISCREG_TT));
+        dest->setMiscReg(MISCREG_TPC, src->readMiscReg(MISCREG_TPC));
+        dest->setMiscReg(MISCREG_TNPC, src->readMiscReg(MISCREG_TNPC));
+        dest->setMiscReg(MISCREG_TSTATE, src->readMiscReg(MISCREG_TSTATE));
+    }
+
+    // Save off the traplevel
+    dest->setMiscReg(MISCREG_TL, tl);
+    src->setMiscReg(MISCREG_TL, tl);
+
+
+    // ASRs
+    dest->setMiscReg(MISCREG_Y, src->readMiscReg(MISCREG_Y));
+    dest->setMiscReg(MISCREG_CCR, src->readMiscReg(MISCREG_CCR));
+    dest->setMiscReg(MISCREG_ASI, src->readMiscReg(MISCREG_ASI));
+    dest->setMiscReg(MISCREG_TICK, src->readMiscReg(MISCREG_TICK));
+    dest->setMiscReg(MISCREG_FPRS, src->readMiscReg(MISCREG_FPRS));
+    dest->setMiscReg(MISCREG_SOFTINT, src->readMiscReg(MISCREG_SOFTINT));
+    dest->setMiscReg(MISCREG_TICK_CMPR, src->readMiscReg(MISCREG_TICK_CMPR));
+    dest->setMiscReg(MISCREG_STICK, src->readMiscReg(MISCREG_STICK));
+    dest->setMiscReg(MISCREG_STICK_CMPR, src->readMiscReg(MISCREG_STICK_CMPR));
+
+    // Priv Registers
+    dest->setMiscReg(MISCREG_TICK, src->readMiscReg(MISCREG_TICK));
+    dest->setMiscReg(MISCREG_TBA, src->readMiscReg(MISCREG_TBA));
+    dest->setMiscReg(MISCREG_PSTATE, src->readMiscReg(MISCREG_PSTATE));
+    dest->setMiscReg(MISCREG_PIL, src->readMiscReg(MISCREG_PIL));
+    dest->setMiscReg(MISCREG_CWP, src->readMiscReg(MISCREG_CWP));
+    dest->setMiscReg(MISCREG_CANSAVE, src->readMiscReg(MISCREG_CANSAVE));
+    dest->setMiscReg(MISCREG_CANRESTORE, src->readMiscReg(MISCREG_CANRESTORE));
+    dest->setMiscReg(MISCREG_OTHERWIN, src->readMiscReg(MISCREG_OTHERWIN));
+    dest->setMiscReg(MISCREG_CLEANWIN, src->readMiscReg(MISCREG_CLEANWIN));
+    dest->setMiscReg(MISCREG_WSTATE, src->readMiscReg(MISCREG_WSTATE));
+    dest->setMiscReg(MISCREG_GL, src->readMiscReg(MISCREG_GL));
+
+    // Hyperprivilged registers
+    dest->setMiscReg(MISCREG_HPSTATE, src->readMiscReg(MISCREG_HPSTATE));
+    dest->setMiscReg(MISCREG_HINTP, src->readMiscReg(MISCREG_HINTP));
+    dest->setMiscReg(MISCREG_HTBA, src->readMiscReg(MISCREG_HTBA));
+    dest->setMiscReg(MISCREG_STRAND_STS_REG,
+            src->readMiscReg(MISCREG_STRAND_STS_REG));
+    dest->setMiscReg(MISCREG_HSTICK_CMPR,
+            src->readMiscReg(MISCREG_HSTICK_CMPR));
+
+    // FSR
+    dest->setMiscReg(MISCREG_FSR, src->readMiscReg(MISCREG_FSR));
+}
+
+void SparcISA::copyRegs(ThreadContext *src, ThreadContext *dest)
+{
+    // First loop through the integer registers.
+    for (int i = 0; i < TheISA::NumIntRegs; ++i) {
+        dest->setIntReg(i, src->readIntReg(i));
+    }
+
+    // Then loop through the floating point registers.
+    for (int i = 0; i < TheISA::NumFloatRegs; ++i) {
+        dest->setFloatRegBits(i, src->readFloatRegBits(i));
+    }
+
+    // Copy misc. registers
+    copyMiscRegs(src, dest);
+
+    // Lastly copy PC/NPC
+    dest->setPC(src->readPC());
+    dest->setNextPC(src->readNextPC());
+    dest->setNextNPC(src->readNextNPC());
+}
diff --git a/src/arch/sparc/regfile.hh b/src/arch/sparc/regfile.hh
index db48b2d78..500fbbba4 100644
--- a/src/arch/sparc/regfile.hh
+++ b/src/arch/sparc/regfile.hh
@@ -32,832 +32,84 @@
 #ifndef __ARCH_SPARC_REGFILE_HH__
 #define __ARCH_SPARC_REGFILE_HH__
 
-#include "arch/sparc/exceptions.hh"
 #include "arch/sparc/faults.hh"
-#include "base/trace.hh"
-#include "sim/byteswap.hh"
-#include "cpu/cpuevent.hh"
+#include "arch/sparc/floatregfile.hh"
+#include "arch/sparc/intregfile.hh"
+#include "arch/sparc/isa_traits.hh"
+#include "arch/sparc/miscregfile.hh"
+#include "arch/sparc/types.hh"
 #include "sim/host.hh"
 
+#include <string>
+
 class Checkpoint;
 
 namespace SparcISA
 {
-
-    typedef uint8_t  RegIndex;
-
-    // MAXTL - maximum trap level
-    const int MaxPTL = 2;
-    const int MaxTL  = 6;
-    const int MaxGL  = 3;
-    const int MaxPGL = 2;
-
-    // NWINDOWS - number of register windows, can be 3 to 32
-    const int NWindows = 32;
-
-    const int AsrStart = 0;
-    const int PrStart = 32;
-    const int HprStart = 64;
-    const int MiscStart = 96;
-
-    const uint64_t Bit64 = (1ULL << 63);
-    class IntRegFile
+    class RegFile
     {
       protected:
-        static const int FrameOffsetBits = 3;
-        static const int FrameNumBits = 2;
-
-        static const int RegsPerFrame = 1 << FrameOffsetBits;
-        static const int FrameNumMask =
-                (FrameNumBits == sizeof(int)) ?
-                (unsigned int)(-1) :
-                (1 << FrameNumBits) - 1;
-        static const int FrameOffsetMask =
-                (FrameOffsetBits == sizeof(int)) ?
-                (unsigned int)(-1) :
-                (1 << FrameOffsetBits) - 1;
-
-        IntReg regGlobals[MaxGL][RegsPerFrame];
-        IntReg regSegments[2 * NWindows][RegsPerFrame];
-
-        enum regFrame {Globals, Outputs, Locals, Inputs, NumFrames};
-
-        IntReg * regView[NumFrames];
-
-        static const int RegGlobalOffset = 0;
-        static const int FrameOffset = MaxGL * RegsPerFrame;
-        int offset[NumFrames];
+        Addr pc;		// Program Counter
+        Addr npc;		// Next Program Counter
+        Addr nnpc;
 
       public:
+        Addr readPC();
+        void setPC(Addr val);
 
-        int flattenIndex(int reg)
-        {
-            int flatIndex = offset[reg >> FrameOffsetBits]
-                | (reg & FrameOffsetMask);
-            DPRINTF(Sparc, "Flattened index %d into %d.\n", reg, flatIndex);
-            return flatIndex;
-        }
-
-        void clear()
-        {
-            int x;
-            for (x = 0; x < MaxGL; x++)
-                memset(regGlobals[x], 0, sizeof(regGlobals[x]));
-            for(int x = 0; x < 2 * NWindows; x++)
-                bzero(regSegments[x], sizeof(regSegments[x]));
-        }
-
-        IntRegFile()
-        {
-            offset[Globals] = 0;
-            regView[Globals] = regGlobals[0];
-            setCWP(0);
-            clear();
-        }
-
-        IntReg readReg(int intReg)
-        {
-            IntReg val =
-                regView[intReg >> FrameOffsetBits][intReg & FrameOffsetMask];
-            DPRINTF(Sparc, "Read register %d = 0x%x\n", intReg, val);
-            return val;
-        }
-
-        Fault setReg(int intReg, const IntReg &val)
-        {
-            if(intReg)
-                DPRINTF(Sparc, "Wrote register %d = 0x%x\n", intReg, val);
-            regView[intReg >> FrameOffsetBits][intReg & FrameOffsetMask] = val;
-            return NoFault;
-        }
-
-        //This doesn't effect the actual CWP register.
-        //It's purpose is to adjust the view of the register file
-        //to what it would be if CWP = cwp.
-        void setCWP(int cwp)
-        {
-            int index = ((NWindows - cwp) % NWindows) * 2;
-            offset[Outputs] = FrameOffset + (index * RegsPerFrame);
-            offset[Locals] = FrameOffset + ((index+1) * RegsPerFrame);
-            offset[Inputs] = FrameOffset +
-                (((index+2) % (NWindows * 2)) * RegsPerFrame);
-            regView[Outputs] = regSegments[index];
-            regView[Locals] = regSegments[index+1];
-            regView[Inputs] = regSegments[(index+2) % (NWindows * 2)];
-
-            DPRINTF(Sparc, "Changed the CWP value to %d\n", cwp);
-        }
-
-        void setGlobals(int gl)
-        {
-
-            DPRINTF(Sparc, "Now using %d globals", gl);
-
-            regView[Globals] = regGlobals[gl];
-            offset[Globals] = RegGlobalOffset + gl * RegsPerFrame;
-        }
+        Addr readNextPC();
+        void setNextPC(Addr val);
 
-        void serialize(std::ostream &os);
-
-        void unserialize(Checkpoint *cp, const std::string &section);
-    };
-
-    typedef float float32_t;
-    typedef double float64_t;
-    //FIXME long double refers to a 10 byte float, rather than a
-    //16 byte float as required. This data type may have to be emulated.
-    typedef double float128_t;
-
-    class FloatRegFile
-    {
-      public:
-        static const int SingleWidth = 32;
-        static const int DoubleWidth = 64;
-        static const int QuadWidth = 128;
+        Addr readNextNPC();
+        void setNextNPC(Addr val);
 
       protected:
-
-        //Since the floating point registers overlap each other,
-        //A generic storage space is used. The float to be returned is
-        //pulled from the appropriate section of this region.
-        char regSpace[(SingleWidth / 8) * NumFloatRegs];
+        IntRegFile intRegFile;		// integer register file
+        FloatRegFile floatRegFile;	// floating point register file
+        MiscRegFile miscRegFile;	// control register file
 
       public:
 
-        void clear()
-        {
-            bzero(regSpace, sizeof(regSpace));
-        }
-
-        FloatReg readReg(int floatReg, int width)
-        {
-            //In each of these cases, we have to copy the value into a temporary
-            //variable. This is because we may otherwise try to access an
-            //unaligned portion of memory.
-            switch(width)
-            {
-              case SingleWidth:
-                float32_t result32;
-                memcpy(&result32, regSpace + 4 * floatReg, sizeof(result32));
-                return htog(result32);
-              case DoubleWidth:
-                float64_t result64;
-                memcpy(&result64, regSpace + 4 * floatReg, sizeof(result64));
-                return htog(result64);
-              case QuadWidth:
-                float128_t result128;
-                memcpy(&result128, regSpace + 4 * floatReg, sizeof(result128));
-                return htog(result128);
-              default:
-                panic("Attempted to read a %d bit floating point register!", width);
-            }
-        }
-
-        FloatRegBits readRegBits(int floatReg, int width)
-        {
-            //In each of these cases, we have to copy the value into a temporary
-            //variable. This is because we may otherwise try to access an
-            //unaligned portion of memory.
-            switch(width)
-            {
-              case SingleWidth:
-                uint32_t result32;
-                memcpy(&result32, regSpace + 4 * floatReg, sizeof(result32));
-                return htog(result32);
-              case DoubleWidth:
-                uint64_t result64;
-                memcpy(&result64, regSpace + 4 * floatReg, sizeof(result64));
-                return htog(result64);
-              case QuadWidth:
-                uint64_t result128;
-                memcpy(&result128, regSpace + 4 * floatReg, sizeof(result128));
-                return htog(result128);
-              default:
-                panic("Attempted to read a %d bit floating point register!", width);
-            }
-        }
-
-        Fault setReg(int floatReg, const FloatReg &val, int width)
-        {
-            //In each of these cases, we have to copy the value into a temporary
-            //variable. This is because we may otherwise try to access an
-            //unaligned portion of memory.
-
-            uint32_t result32;
-            uint64_t result64;
-            DPRINTF(Sparc, "Setting floating point register %d\n", floatReg);
-            switch(width)
-            {
-              case SingleWidth:
-                result32 = gtoh((uint32_t)val);
-                memcpy(regSpace + 4 * floatReg, &result32, sizeof(result32));
-                break;
-              case DoubleWidth:
-                result64 = gtoh((uint64_t)val);
-                memcpy(regSpace + 4 * floatReg, &result64, sizeof(result64));
-                break;
-              case QuadWidth:
-                panic("Quad width FP not implemented.");
-                break;
-              default:
-                panic("Attempted to read a %d bit floating point register!", width);
-            }
-            return NoFault;
-        }
-
-        Fault setRegBits(int floatReg, const FloatRegBits &val, int width)
-        {
-            //In each of these cases, we have to copy the value into a temporary
-            //variable. This is because we may otherwise try to access an
-            //unaligned portion of memory.
-            uint32_t result32;
-            uint64_t result64;
-            switch(width)
-            {
-              case SingleWidth:
-                result32 = gtoh((uint32_t)val);
-                memcpy(regSpace + 4 * floatReg, &result32, sizeof(result32));
-                break;
-              case DoubleWidth:
-                result64 = gtoh((uint64_t)val);
-                memcpy(regSpace + 4 * floatReg, &result64, sizeof(result64));
-                break;
-              case QuadWidth:
-                panic("Quad width FP not implemented.");
-                break;
-              default:
-                panic("Attempted to read a %d bit floating point register!", width);
-            }
-            return NoFault;
-        }
+        void clear();
 
-        void serialize(std::ostream &os);
+        int FlattenIntIndex(int reg);
 
-        void unserialize(Checkpoint *cp, const std::string &section);
-    };
+        MiscReg readMiscReg(int miscReg);
 
-    enum MiscRegIndex
-    {
-        /** Ancillary State Registers */
-        MISCREG_Y  = AsrStart + 0,
-        MISCREG_CCR = AsrStart + 2,
-        MISCREG_ASI = AsrStart + 3,
-        MISCREG_TICK = AsrStart + 4,
-        MISCREG_PC = AsrStart + 5,
-        MISCREG_FPRS = AsrStart + 6,
-        MISCREG_PCR = AsrStart + 16,
-        MISCREG_PIC = AsrStart + 17,
-        MISCREG_GSR = AsrStart + 19,
-        MISCREG_SOFTINT_SET = AsrStart + 20,
-        MISCREG_SOFTINT_CLR = AsrStart + 21,
-        MISCREG_SOFTINT = AsrStart + 22,
-        MISCREG_TICK_CMPR = AsrStart + 23,
-        MISCREG_STICK = AsrStart + 24,
-        MISCREG_STICK_CMPR = AsrStart + 25,
-
-        /** Privilged Registers */
-        MISCREG_TPC = PrStart + 0,
-        MISCREG_TNPC = PrStart + 1,
-        MISCREG_TSTATE = PrStart + 2,
-        MISCREG_TT = PrStart + 3,
-        MISCREG_PRIVTICK = PrStart + 4,
-        MISCREG_TBA = PrStart + 5,
-        MISCREG_PSTATE = PrStart + 6,
-        MISCREG_TL = PrStart + 7,
-        MISCREG_PIL = PrStart + 8,
-        MISCREG_CWP = PrStart + 9,
-        MISCREG_CANSAVE = PrStart + 10,
-        MISCREG_CANRESTORE = PrStart + 11,
-        MISCREG_CLEANWIN = PrStart + 12,
-        MISCREG_OTHERWIN = PrStart + 13,
-        MISCREG_WSTATE = PrStart + 14,
-        MISCREG_GL = PrStart + 16,
-
-        /** Hyper privileged registers */
-        MISCREG_HPSTATE = HprStart + 0,
-        MISCREG_HTSTATE = HprStart + 1,
-        MISCREG_HINTP = HprStart + 3,
-        MISCREG_HTBA = HprStart + 5,
-        MISCREG_HVER = HprStart + 6,
-        MISCREG_STRAND_STS_REG = HprStart + 16,
-        MISCREG_HSTICK_CMPR = HprStart + 31,
-
-        /** Floating Point Status Register */
-        MISCREG_FSR = MiscStart + 0
+        MiscReg readMiscRegWithEffect(int miscReg,
+                Fault &fault, ThreadContext *tc);
 
-    };
+        Fault setMiscReg(int miscReg, const MiscReg &val);
 
-    // The control registers, broken out into fields
-    class MiscRegFile
-    {
-      private:
-
-        /* ASR Registers */
-        union {
-            uint64_t y;		// Y (used in obsolete multiplication)
-            struct {
-                uint64_t value:32;	// The actual value stored in y
-                uint64_t :32;	// reserved bits
-            } yFields;
-        };
-        union {
-            uint8_t	ccr;		// Condition Code Register
-            struct {
-                union {
-                    uint8_t icc:4;	// 32-bit condition codes
-                    struct {
-                        uint8_t c:1;	// Carry
-                        uint8_t v:1;	// Overflow
-                        uint8_t z:1;	// Zero
-                        uint8_t n:1;	// Negative
-                    } iccFields;
-                };
-                union {
-                    uint8_t xcc:4;	// 64-bit condition codes
-                    struct {
-                        uint8_t c:1;	// Carry
-                        uint8_t v:1;	// Overflow
-                        uint8_t z:1;	// Zero
-                        uint8_t n:1;	// Negative
-                    } xccFields;
-                };
-            } ccrFields;
-        };
-        uint8_t asi;		// Address Space Identifier
-        union {
-            uint64_t tick;		// Hardware clock-tick counter
-            struct {
-                int64_t counter:63;	// Clock-tick count
-                uint64_t npt:1;		// Non-priveleged trap
-            } tickFields;
-        };
-        union {
-            uint8_t		fprs;	// Floating-Point Register State
-            struct {
-                uint8_t dl:1;		// Dirty lower
-                uint8_t du:1;		// Dirty upper
-                uint8_t fef:1;		// FPRS enable floating-Point
-            } fprsFields;
-        };
-        union {
-            uint64_t softint;
-            struct {
-                uint64_t tm:1;
-                uint64_t int_level:14;
-                uint64_t sm:1;
-            } softintFields;
-        };
-        union {
-            uint64_t tick_cmpr;		// Hardware tick compare registers
-            struct {
-                uint64_t tick_cmpr:63;	// Clock-tick count
-                uint64_t int_dis:1;		// Non-priveleged trap
-            } tick_cmprFields;
-        };
-        union {
-            uint64_t stick;		// Hardware clock-tick counter
-            struct {
-                int64_t :63;	// Not used, storage in SparcSystem
-                uint64_t npt:1;		// Non-priveleged trap
-            } stickFields;
-        };
-        union {
-            uint64_t stick_cmpr;		// Hardware tick compare registers
-            struct {
-                uint64_t tick_cmpr:63;	// Clock-tick count
-                uint64_t int_dis:1;		// Non-priveleged trap
-            } stick_cmprFields;
-        };
-
-
-        /* Privileged Registers */
-        uint64_t tpc[MaxTL];	// Trap Program Counter (value from
-                                // previous trap level)
-        uint64_t tnpc[MaxTL];	// Trap Next Program Counter (value from
-                                // previous trap level)
-        union {
-            uint64_t tstate[MaxTL];	// Trap State
-            struct {
-                //Values are from previous trap level
-                uint64_t cwp:5;		// Current Window Pointer
-                uint64_t :3;	// Reserved bits
-                uint64_t pstate:13;	// Process State
-                uint64_t :3;	// Reserved bits
-                uint64_t asi:8;		// Address Space Identifier
-                uint64_t ccr:8;		// Condition Code Register
-                uint64_t gl:8;		// Global level
-            } tstateFields[MaxTL];
-        };
-        uint16_t tt[MaxTL];	// Trap Type (Type of trap which occured
-                                // on the previous level)
-        uint64_t tba;		// Trap Base Address
-
-        union {
-            uint16_t pstate;		// Process State Register
-            struct {
-                uint16_t :1;		// reserved
-                uint16_t ie:1;		// Interrupt enable
-                uint16_t priv:1;	// Privelege mode
-                uint16_t am:1;		// Address mask
-                uint16_t pef:1;		// PSTATE enable floating-point
-                uint16_t :1;		// reserved2
-                uint16_t mm:2;		// Memory Model
-                uint16_t tle:1;		// Trap little-endian
-                uint16_t cle:1;		// Current little-endian
-            } pstateFields;
-        };
-        uint8_t tl;		// Trap Level
-        uint8_t pil;		// Process Interrupt Register
-        uint8_t cwp;		// Current Window Pointer
-        uint8_t cansave;	// Savable windows
-        uint8_t canrestore;	// Restorable windows
-        uint8_t cleanwin;	// Clean windows
-        uint8_t otherwin;	// Other windows
-        union {
-            uint8_t wstate;		// Window State
-            struct {
-                uint8_t normal:3;	// Bits TT<4:2> are set to on a normal
-                                        // register window trap
-                uint8_t other:3;	// Bits TT<4:2> are set to on an "otherwin"
-                                        // register window trap
-            } wstateFields;
-        };
-        uint8_t gl;             // Global level register
-
-
-        /** Hyperprivileged Registers */
-        union {
-            uint64_t hpstate; // Hyperprivileged State Register
-            struct {
-                uint8_t tlz: 1;
-                uint8_t :1;
-                uint8_t hpriv:1;
-                uint8_t :2;
-                uint8_t red:1;
-                uint8_t :4;
-                uint8_t ibe:1;
-                uint8_t id:1;
-            } hpstateFields;
-        };
-
-        uint64_t htstate[MaxTL]; // Hyperprivileged Trap State Register
-        uint64_t hintp;
-        uint64_t htba; // Hyperprivileged Trap Base Address register
-        union {
-            uint64_t hstick_cmpr;		// Hardware tick compare registers
-            struct {
-                uint64_t tick_cmpr:63;	// Clock-tick count
-                uint64_t int_dis:1;		// Non-priveleged trap
-            } hstick_cmprFields;
-        };
-
-        uint64_t strandStatusReg; // Per strand status register
-
-
-        /** Floating point misc registers. */
-        union {
-            uint64_t	fsr;	// Floating-Point State Register
-            struct {
-                union {
-                    uint64_t cexc:5;	// Current excpetion
-                    struct {
-                        uint64_t nxc:1;		// Inexact
-                        uint64_t dzc:1;		// Divide by zero
-                        uint64_t ufc:1;		// Underflow
-                        uint64_t ofc:1;		// Overflow
-                        uint64_t nvc:1;		// Invalid operand
-                    } cexcFields;
-                };
-                union {
-                    uint64_t aexc:5;		// Accrued exception
-                    struct {
-                        uint64_t nxc:1;		// Inexact
-                        uint64_t dzc:1;		// Divide by zero
-                        uint64_t ufc:1;		// Underflow
-                        uint64_t ofc:1;		// Overflow
-                        uint64_t nvc:1;		// Invalid operand
-                    } aexcFields;
-                };
-                uint64_t fcc0:2;		// Floating-Point condtion codes
-                uint64_t :1;		// Reserved bits
-                uint64_t qne:1;			// Deferred trap queue not empty
-                                                // with no queue, it should read 0
-                uint64_t ftt:3;			// Floating-Point trap type
-                uint64_t ver:3;			// Version (of the FPU)
-                uint64_t :2;		// Reserved bits
-                uint64_t ns:1;			// Nonstandard floating point
-                union {
-                    uint64_t tem:5;			// Trap Enable Mask
-                    struct {
-                        uint64_t nxm:1;		// Inexact
-                        uint64_t dzm:1;		// Divide by zero
-                        uint64_t ufm:1;		// Underflow
-                        uint64_t ofm:1;		// Overflow
-                        uint64_t nvm:1;		// Invalid operand
-                    } temFields;
-                };
-                uint64_t :2;		// Reserved bits
-                uint64_t rd:2;			// Rounding direction
-                uint64_t fcc1:2;		// Floating-Point condition codes
-                uint64_t fcc2:2;		// Floating-Point condition codes
-                uint64_t fcc3:2;		// Floating-Point condition codes
-                uint64_t :26;		// Reserved bits
-            } fsrFields;
-        };
-
-        // These need to check the int_dis field and if 0 then
-        // set appropriate bit in softint and checkinterrutps on the cpu
-#if FULL_SYSTEM
-        /** Process a tick compare event and generate an interrupt on the cpu if
-         * appropriate. */
-        void processTickCompare(ThreadContext *tc);
-        void processSTickCompare(ThreadContext *tc);
-        void processHSTickCompare(ThreadContext *tc);
-
-        typedef CpuEventWrapper<MiscRegFile,
-                &MiscRegFile::processTickCompare> TickCompareEvent;
-        TickCompareEvent *tickCompare;
-
-        typedef CpuEventWrapper<MiscRegFile,
-                &MiscRegFile::processSTickCompare> STickCompareEvent;
-        STickCompareEvent *sTickCompare;
-
-        typedef CpuEventWrapper<MiscRegFile,
-                &MiscRegFile::processHSTickCompare> HSTickCompareEvent;
-        HSTickCompareEvent *hSTickCompare;
-
-        /** Fullsystem only register version of ReadRegWithEffect() */
-        MiscReg readFSRegWithEffect(int miscReg, Fault &fault, ThreadContext *tc);
-        /** Fullsystem only register version of SetRegWithEffect() */
-        Fault setFSRegWithEffect(int miscReg, const MiscReg &val,
+        Fault setMiscRegWithEffect(int miscReg, const MiscReg &val,
                 ThreadContext * tc);
-#endif
-      public:
 
-        void reset()
-        {
-            pstateFields.pef = 0; //No FPU
-            //pstateFields.pef = 1; //FPU
-#if FULL_SYSTEM
-            //For SPARC, when a system is first started, there is a power
-            //on reset Trap which sets the processor into the following state.
-            //Bits that aren't set aren't defined on startup.
-            tl = MaxTL;
-            gl = MaxGL;
-
-            tickFields.counter = 0; //The TICK register is unreadable bya
-            tickFields.npt = 1; //The TICK register is unreadable by by !priv
-
-            softint = 0; // Clear all the soft interrupt bits
-            tick_cmprFields.int_dis = 1; // disable timer compare interrupts
-            tick_cmprFields.tick_cmpr = 0; // Reset to 0 for pretty printing
-            stickFields.npt = 1; //The TICK register is unreadable by by !priv
-            stick_cmprFields.int_dis = 1; // disable timer compare interrupts
-            stick_cmprFields.tick_cmpr = 0; // Reset to 0 for pretty printing
-
-
-            tt[tl] = power_on_reset;
-            pstate = 0; // fields 0 but pef
-            pstateFields.pef = 1;
-
-            hpstate = 0;
-            hpstateFields.red = 1;
-            hpstateFields.hpriv = 1;
-            hpstateFields.tlz = 0; // this is a guess
-            hintp = 0; // no interrupts pending
-            hstick_cmprFields.int_dis = 1; // disable timer compare interrupts
-            hstick_cmprFields.tick_cmpr = 0; // Reset to 0 for pretty printing
-#else
-/*	    //This sets up the initial state of the processor for usermode processes
-            pstateFields.priv = 0; //Process runs in user mode
-            pstateFields.ie = 1; //Interrupts are enabled
-            fsrFields.rd = 0; //Round to nearest
-            fsrFields.tem = 0; //Floating point traps not enabled
-            fsrFields.ns = 0; //Non standard mode off
-            fsrFields.qne = 0; //Floating point queue is empty
-            fsrFields.aexc = 0; //No accrued exceptions
-            fsrFields.cexc = 0; //No current exceptions
-
-            //Register window management registers
-            otherwin = 0; //No windows contain info from other programs
-            canrestore = 0; //There are no windows to pop
-            cansave = MaxTL - 2; //All windows are available to save into
-            cleanwin = MaxTL;*/
-#endif
-        }
-
-        MiscRegFile()
-        {
-            reset();
-        }
-
-        /** read a value out of an either an SE or FS IPR. No checking is done
-         * about SE vs. FS as this is mostly used to copy the regfile. Thus more
-         * register are copied that are necessary for FS. However this prevents
-         * a bunch of ifdefs and is rarely called so is not performance
-         * criticial. */
-        MiscReg readReg(int miscReg);
-
-        /** Read a value from an IPR. Only the SE iprs are here and the rest
-         * are are readFSRegWithEffect (which is called by readRegWithEffect()).
-         * Checking is done for permission based on state bits in the miscreg
-         * file. */
-        MiscReg readRegWithEffect(int miscReg, Fault &fault, ThreadContext *tc);
-
-        /** write a value into an either an SE or FS IPR. No checking is done
-         * about SE vs. FS as this is mostly used to copy the regfile. Thus more
-         * register are copied that are necessary for FS. However this prevents
-         * a bunch of ifdefs and is rarely called so is not performance
-         * criticial.*/
-        Fault setReg(int miscReg, const MiscReg &val);
-
-        /** Write a value into an IPR. Only the SE iprs are here and the rest
-         * are are setFSRegWithEffect (which is called by setRegWithEffect()).
-         * Checking is done for permission based on state bits in the miscreg
-         * file. */
-        Fault setRegWithEffect(int miscReg,
-                const MiscReg &val, ThreadContext * tc);
-
-        void serialize(std::ostream & os);
-
-        void unserialize(Checkpoint * cp, const std::string & section);
-
-        void copyMiscRegs(ThreadContext * tc);
+        FloatReg readFloatReg(int floatReg, int width);
 
-      protected:
+        FloatReg readFloatReg(int floatReg);
 
-        bool isHyperPriv() { return hpstateFields.hpriv; }
-        bool isPriv() { return hpstateFields.hpriv || pstateFields.priv; }
-        bool isNonPriv() { return !isPriv(); }
-    };
+        FloatRegBits readFloatRegBits(int floatReg, int width);
 
-    typedef union
-    {
-        IntReg  intreg;
-        FloatReg   fpreg;
-        MiscReg ctrlreg;
-    } AnyReg;
+        FloatRegBits readFloatRegBits(int floatReg);
 
-    class RegFile
-    {
-      protected:
-        Addr pc;		// Program Counter
-        Addr npc;		// Next Program Counter
-        Addr nnpc;
-
-      public:
-        Addr readPC()
-        {
-            return pc;
-        }
-
-        void setPC(Addr val)
-        {
-            pc = val;
-        }
-
-        Addr readNextPC()
-        {
-            return npc;
-        }
-
-        void setNextPC(Addr val)
-        {
-            npc = val;
-        }
-
-        Addr readNextNPC()
-        {
-            return nnpc;
-        }
-
-        void setNextNPC(Addr val)
-        {
-            nnpc = val;
-        }
-
-      protected:
-        IntRegFile intRegFile;		// integer register file
-        FloatRegFile floatRegFile;	// floating point register file
-        MiscRegFile miscRegFile;	// control register file
+        Fault setFloatReg(int floatReg, const FloatReg &val, int width);
 
-      public:
+        Fault setFloatReg(int floatReg, const FloatReg &val);
 
-        void clear()
-        {
-            intRegFile.clear();
-            floatRegFile.clear();
-        }
+        Fault setFloatRegBits(int floatReg, const FloatRegBits &val, int width);
 
-        int FlattenIntIndex(int reg)
-        {
-            return intRegFile.flattenIndex(reg);
-        }
+        Fault setFloatRegBits(int floatReg, const FloatRegBits &val);
 
-        MiscReg readMiscReg(int miscReg)
-        {
-            return miscRegFile.readReg(miscReg);
-        }
+        IntReg readIntReg(int intReg);
 
-        MiscReg readMiscRegWithEffect(int miscReg,
-                Fault &fault, ThreadContext *tc)
-        {
-            return miscRegFile.readRegWithEffect(miscReg, fault, tc);
-        }
-
-        Fault setMiscReg(int miscReg, const MiscReg &val)
-        {
-            return miscRegFile.setReg(miscReg, val);
-        }
-
-        Fault setMiscRegWithEffect(int miscReg, const MiscReg &val,
-                ThreadContext * tc)
-        {
-            return miscRegFile.setRegWithEffect(miscReg, val, tc);
-        }
-
-        FloatReg readFloatReg(int floatReg, int width)
-        {
-            return floatRegFile.readReg(floatReg, width);
-        }
-
-        FloatReg readFloatReg(int floatReg)
-        {
-            //Use the "natural" width of a single float
-            return floatRegFile.readReg(floatReg, FloatRegFile::SingleWidth);
-        }
-
-        FloatRegBits readFloatRegBits(int floatReg, int width)
-        {
-            return floatRegFile.readRegBits(floatReg, width);
-        }
-
-        FloatRegBits readFloatRegBits(int floatReg)
-        {
-            //Use the "natural" width of a single float
-            return floatRegFile.readRegBits(floatReg,
-                    FloatRegFile::SingleWidth);
-        }
-
-        Fault setFloatReg(int floatReg, const FloatReg &val, int width)
-        {
-            return floatRegFile.setReg(floatReg, val, width);
-        }
-
-        Fault setFloatReg(int floatReg, const FloatReg &val)
-        {
-            //Use the "natural" width of a single float
-            return setFloatReg(floatReg, val, FloatRegFile::SingleWidth);
-        }
-
-        Fault setFloatRegBits(int floatReg, const FloatRegBits &val, int width)
-        {
-            return floatRegFile.setRegBits(floatReg, val, width);
-        }
-
-        Fault setFloatRegBits(int floatReg, const FloatRegBits &val)
-        {
-            //Use the "natural" width of a single float
-            return floatRegFile.setRegBits(floatReg, val,
-                    FloatRegFile::SingleWidth);
-        }
-
-        IntReg readIntReg(int intReg)
-        {
-            return intRegFile.readReg(intReg);
-        }
-
-        Fault setIntReg(int intReg, const IntReg &val)
-        {
-            return intRegFile.setReg(intReg, val);
-        }
+        Fault setIntReg(int intReg, const IntReg &val);
 
         void serialize(std::ostream &os);
         void unserialize(Checkpoint *cp, const std::string &section);
 
       public:
 
-        enum ContextParam
-        {
-            CONTEXT_CWP,
-            CONTEXT_GLOBALS
-        };
-        typedef int ContextVal;
-
-        void changeContext(ContextParam param, ContextVal val)
-        {
-            switch(param)
-            {
-              case CONTEXT_CWP:
-                intRegFile.setCWP(val);
-                break;
-              case CONTEXT_GLOBALS:
-                intRegFile.setGlobals(val);
-                break;
-              default:
-                panic("Tried to set illegal context parameter in the SPARC regfile.\n");
-            }
-        }
+        void changeContext(RegContextParam param, RegContextVal val);
     };
 
     void copyRegs(ThreadContext *src, ThreadContext *dest);
diff --git a/src/arch/sparc/syscallreturn.hh b/src/arch/sparc/syscallreturn.hh
new file mode 100644
index 000000000..fd63a8868
--- /dev/null
+++ b/src/arch/sparc/syscallreturn.hh
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2003-2005 The Regents of The University of Michigan
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Gabe Black
+ */
+
+#ifndef __ARCH_SPARC_SYSCALLRETURN_HH__
+#define __ARCH_SPARC_SYSCALLRETURN_HH__
+
+#include <inttypes.h>
+
+class SyscallReturn
+{
+  public:
+    template <class T>
+    SyscallReturn(T v, bool s)
+    {
+        retval = (uint64_t)v;
+        success = s;
+    }
+
+    template <class T>
+    SyscallReturn(T v)
+    {
+        success = (v >= 0);
+        retval = (uint64_t)v;
+    }
+
+    ~SyscallReturn() {}
+
+    SyscallReturn& operator=(const SyscallReturn& s)
+    {
+        retval = s.retval;
+        success = s.success;
+        return *this;
+    }
+
+    bool successful() { return success; }
+    uint64_t value() { return retval; }
+
+    private:
+    uint64_t retval;
+    bool success;
+};
+
+namespace SparcISA
+{
+    static inline void setSyscallReturn(SyscallReturn return_value,
+            RegFile *regs)
+    {
+        // check for error condition.  SPARC syscall convention is to
+        // indicate success/failure in reg the carry bit of the ccr
+        // and put the return value itself in the standard return value reg ().
+        if (return_value.successful()) {
+            // no error, clear XCC.C
+            regs->setMiscReg(MISCREG_CCR, regs->readMiscReg(MISCREG_CCR) & 0xEF);
+            regs->setIntReg(ReturnValueReg, return_value.value());
+        } else {
+            // got an error, set XCC.C
+            regs->setMiscReg(MISCREG_CCR, regs->readMiscReg(MISCREG_CCR) | 0x10);
+            regs->setIntReg(ReturnValueReg, return_value.value());
+        }
+    }
+};
+
+#endif
diff --git a/src/arch/sparc/types.hh b/src/arch/sparc/types.hh
new file mode 100644
index 000000000..88fb24153
--- /dev/null
+++ b/src/arch/sparc/types.hh
@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2003-2005 The Regents of The University of Michigan
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Gabe Black
+ */
+
+#ifndef __ARCH_SPARC_TYPES_HH__
+#define __ARCH_SPARC_TYPES_HH__
+
+#include <inttypes.h>
+
+namespace SparcISA
+{
+    typedef uint32_t MachInst;
+    typedef uint64_t ExtMachInst;
+
+    typedef uint64_t IntReg;
+    typedef uint64_t MiscReg;
+    typedef double FloatReg;
+    typedef uint64_t FloatRegBits;
+    typedef union
+    {
+        IntReg intReg;
+        FloatReg fpreg;
+        MiscReg ctrlreg;
+    } AnyReg;
+
+    enum RegContextParam
+    {
+        CONTEXT_CWP,
+        CONTEXT_GLOBALS
+    };
+
+    typedef int RegContextVal;
+
+    typedef uint8_t RegIndex;
+}
+
+#endif