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diff --git a/src/arch/mips/regfile/misc_regfile.hh b/src/arch/mips/regfile/misc_regfile.hh
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+++ b/src/arch/mips/regfile/misc_regfile.hh
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+/*
+ * 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.
+ */
+
+#ifndef __ARCH_MIPS_MISC_REGFILE_HH__
+#define __ARCH_MIPS_MISC_REGFILE_HH__
+
+#include "arch/mips/types.hh"
+#include "arch/mips/constants.hh"
+#include "sim/faults.hh"
+
+class Checkpoint;
+class ExecContext;
+class Regfile;
+
+namespace MipsISA
+{
+    class MiscRegFile {
+
+      protected:
+        uint64_t	fpcr;		// floating point condition codes
+        uint64_t	uniq;		// process-unique register
+        bool		lock_flag;	// lock flag for LL/SC
+        Addr		lock_addr;	// lock address for LL/SC
+
+        MiscReg miscRegFile[NumMiscRegs];
+
+      public:
+        //These functions should be removed once the simplescalar cpu model
+        //has been replaced.
+        int getInstAsid();
+        int getDataAsid();
+
+        void copyMiscRegs(ExecContext *xc);
+
+        MiscReg readReg(int misc_reg)
+        {
+            return miscRegFile[misc_reg];
+        }
+
+        MiscReg readRegWithEffect(int misc_reg, Fault &fault, ExecContext *xc)
+        {
+            return miscRegFile[misc_reg];
+        }
+
+        Fault setReg(int misc_reg, const MiscReg &val)
+        {
+            miscRegFile[misc_reg] = val; return NoFault;
+        }
+
+        Fault setRegWithEffect(int misc_reg, const MiscReg &val,
+                               ExecContext *xc)
+        {
+            miscRegFile[misc_reg] = val; return NoFault;
+        }
+
+#if FULL_SYSTEM
+        void clearIprs() { }
+
+      protected:
+        InternalProcReg ipr[NumInternalProcRegs]; // Internal processor regs
+
+      private:
+        MiscReg readIpr(int idx, Fault &fault, ExecContext *xc) { }
+
+        Fault setIpr(int idx, uint64_t val, ExecContext *xc) { }
+#endif
+        friend class RegFile;
+    };
+} // namespace MipsISA
+
+#endif