diff --git a/src/arch/power/isa.hh b/src/arch/power/isa.hh
index 3f26f57..16850d1 100644
--- a/src/arch/power/isa.hh
+++ b/src/arch/power/isa.hh
@@ -50,8 +50,8 @@
 class ISA : public SimObject
 {
   protected:
-    MiscReg dummy;
-    MiscReg miscRegs[NumMiscRegs];
+    RegVal dummy;
+    RegVal miscRegs[NumMiscRegs];
 
   public:
     typedef PowerISAParams Params;
@@ -61,14 +61,14 @@
     {
     }
 
-    MiscReg
+    RegVal
     readMiscRegNoEffect(int misc_reg) const
     {
         fatal("Power does not currently have any misc regs defined\n");
         return dummy;
     }
 
-    MiscReg
+    RegVal
     readMiscReg(int misc_reg, ThreadContext *tc)
     {
         fatal("Power does not currently have any misc regs defined\n");
@@ -76,13 +76,13 @@
     }
 
     void
-    setMiscRegNoEffect(int misc_reg, MiscReg val)
+    setMiscRegNoEffect(int misc_reg, RegVal val)
     {
         fatal("Power does not currently have any misc regs defined\n");
     }
 
     void
-    setMiscReg(int misc_reg, MiscReg val, ThreadContext *tc)
+    setMiscReg(int misc_reg, RegVal val, ThreadContext *tc)
     {
         fatal("Power does not currently have any misc regs defined\n");
     }
diff --git a/src/arch/power/linux/process.cc b/src/arch/power/linux/process.cc
index f219852..664b93b 100644
--- a/src/arch/power/linux/process.cc
+++ b/src/arch/power/linux/process.cc
@@ -437,7 +437,7 @@
     PowerProcess::initState();
 }
 
-PowerISA::IntReg
+RegVal
 PowerLinuxProcess::getSyscallArg(ThreadContext *tc, int &i)
 {
     // Linux apparently allows more parameter than the ABI says it should.
@@ -447,7 +447,7 @@
 }
 
 void
-PowerLinuxProcess::setSyscallArg(ThreadContext *tc, int i, PowerISA::IntReg val)
+PowerLinuxProcess::setSyscallArg(ThreadContext *tc, int i, RegVal val)
 {
     // Linux apparently allows more parameter than the ABI says it should.
     // This limit may need to be increased even further.
diff --git a/src/arch/power/linux/process.hh b/src/arch/power/linux/process.hh
index 9874123..aad4c5f 100644
--- a/src/arch/power/linux/process.hh
+++ b/src/arch/power/linux/process.hh
@@ -45,10 +45,10 @@
 
     void initState();
 
-    PowerISA::IntReg getSyscallArg(ThreadContext *tc, int &i);
+    RegVal getSyscallArg(ThreadContext *tc, int &i);
     /// Explicitly import the otherwise hidden getSyscallArg
     using Process::getSyscallArg;
-    void setSyscallArg(ThreadContext *tc, int i, PowerISA::IntReg val);
+    void setSyscallArg(ThreadContext *tc, int i, RegVal val);
 
     /// Array of syscall descriptors, indexed by call number.
     static SyscallDesc syscallDescs[];
diff --git a/src/arch/power/process.cc b/src/arch/power/process.cc
index cf2153a..ee72ba7 100644
--- a/src/arch/power/process.cc
+++ b/src/arch/power/process.cc
@@ -277,7 +277,7 @@
     memState->setStackMin(roundDown(stack_min, pageSize));
 }
 
-PowerISA::IntReg
+RegVal
 PowerProcess::getSyscallArg(ThreadContext *tc, int &i)
 {
     assert(i < 5);
@@ -285,7 +285,7 @@
 }
 
 void
-PowerProcess::setSyscallArg(ThreadContext *tc, int i, PowerISA::IntReg val)
+PowerProcess::setSyscallArg(ThreadContext *tc, int i, RegVal val)
 {
     assert(i < 5);
     tc->setIntReg(ArgumentReg0 + i, val);
diff --git a/src/arch/power/process.hh b/src/arch/power/process.hh
index 348e375..186bc87 100644
--- a/src/arch/power/process.hh
+++ b/src/arch/power/process.hh
@@ -50,10 +50,10 @@
 
   public:
     void argsInit(int intSize, int pageSize);
-    PowerISA::IntReg getSyscallArg(ThreadContext *tc, int &i);
+    RegVal getSyscallArg(ThreadContext *tc, int &i);
     /// Explicitly import the otherwise hidden getSyscallArg
     using Process::getSyscallArg;
-    void setSyscallArg(ThreadContext *tc, int i, PowerISA::IntReg val);
+    void setSyscallArg(ThreadContext *tc, int i, RegVal val);
     void setSyscallReturn(ThreadContext *tc, SyscallReturn return_value);
 };
 
diff --git a/src/arch/power/registers.hh b/src/arch/power/registers.hh
index 909c24e..9d793d3 100644
--- a/src/arch/power/registers.hh
+++ b/src/arch/power/registers.hh
@@ -46,12 +46,6 @@
 // be detected by it. Manually add it here.
 const int MaxMiscDestRegs = PowerISAInst::MaxMiscDestRegs + 1;
 
-typedef RegVal IntReg;
-
-// Floating point register file entry type
-typedef RegVal FloatReg;
-typedef RegVal MiscReg;
-
 // dummy typedef since we don't have CC regs
 typedef uint8_t CCReg;