Address Translation: Make SE mode use an actual TLB/MMU for translation like FS.

--HG--
extra : convert_revision : a04a30df0b6246e877a1cea35420dbac94b506b1

10 files changed, 129 insertions, 116 deletions

diff --git a/src/arch/alpha/SConscript b/src/arch/alpha/SConscript
index 4f293e22f..04bac3996 100644
--- a/src/arch/alpha/SConscript
+++ b/src/arch/alpha/SConscript
@@ -32,27 +32,28 @@
 Import('*')
 
 if env['TARGET_ISA'] == 'alpha':
+    Source('ev5.cc')
     Source('faults.cc')
     Source('floatregfile.cc')
     Source('intregfile.cc')
+    Source('ipr.cc')
     Source('miscregfile.cc')
+    Source('pagetable.cc')
     Source('regfile.cc')
     Source('remote_gdb.cc')
+    Source('tlb.cc')
     Source('utility.cc')
 
+    SimObject('AlphaTLB.py')
+
     if env['FULL_SYSTEM']:
         SimObject('AlphaSystem.py')
-        SimObject('AlphaTLB.py')
 
-        Source('ev5.cc')
         Source('idle_event.cc')
-        Source('ipr.cc')
         Source('kernel_stats.cc')
         Source('osfpal.cc')
-        Source('pagetable.cc')
         Source('stacktrace.cc')
         Source('system.cc')
-        Source('tlb.cc')
         Source('vtophys.cc')
 
         Source('freebsd/system.cc')
diff --git a/src/arch/alpha/ev5.cc b/src/arch/alpha/ev5.cc
index 86b8fd2d0..123506e40 100644
--- a/src/arch/alpha/ev5.cc
+++ b/src/arch/alpha/ev5.cc
@@ -68,22 +68,6 @@ AlphaISA::initCPU(ThreadContext *tc, int cpuId)
     delete reset;
 }
 
-////////////////////////////////////////////////////////////////////////
-//
-//
-//
-void
-AlphaISA::initIPRs(ThreadContext *tc, int cpuId)
-{
-    for (int i = 0; i < NumInternalProcRegs; ++i) {
-        tc->setMiscRegNoEffect(i, 0);
-    }
-
-    tc->setMiscRegNoEffect(IPR_PAL_BASE, PalBase);
-    tc->setMiscRegNoEffect(IPR_MCSR, 0x6);
-    tc->setMiscRegNoEffect(IPR_PALtemp16, cpuId);
-}
-
 
 template <class CPU>
 void
@@ -171,6 +155,24 @@ AlphaISA::MiscRegFile::getDataAsid()
     return EV5::DTB_ASN_ASN(ipr[IPR_DTB_ASN]);
 }
 
+#endif
+
+////////////////////////////////////////////////////////////////////////
+//
+//
+//
+void
+AlphaISA::initIPRs(ThreadContext *tc, int cpuId)
+{
+    for (int i = 0; i < NumInternalProcRegs; ++i) {
+        tc->setMiscRegNoEffect(i, 0);
+    }
+
+    tc->setMiscRegNoEffect(IPR_PAL_BASE, EV5::PalBase);
+    tc->setMiscRegNoEffect(IPR_MCSR, 0x6);
+    tc->setMiscRegNoEffect(IPR_PALtemp16, cpuId);
+}
+
 AlphaISA::MiscReg
 AlphaISA::MiscRegFile::readIpr(int idx, ThreadContext *tc)
 {
@@ -340,8 +342,10 @@ AlphaISA::MiscRegFile::setIpr(int idx, uint64_t val, ThreadContext *tc)
         // write entire quad w/ no side-effect
         old = ipr[idx];
         ipr[idx] = val;
+#if FULL_SYSTEM
         if (tc->getKernelStats())
             tc->getKernelStats()->context(old, val, tc);
+#endif
         break;
 
       case AlphaISA::IPR_DTB_PTE:
@@ -368,11 +372,14 @@ AlphaISA::MiscRegFile::setIpr(int idx, uint64_t val, ThreadContext *tc)
 
         // only write least significant five bits - interrupt level
         ipr[idx] = val & 0x1f;
+#if FULL_SYSTEM
         if (tc->getKernelStats())
             tc->getKernelStats()->swpipl(ipr[idx]);
+#endif
         break;
 
       case AlphaISA::IPR_DTB_CM:
+#if FULL_SYSTEM
         if (val & 0x18) {
             if (tc->getKernelStats())
                 tc->getKernelStats()->mode(TheISA::Kernel::user, tc);
@@ -380,6 +387,7 @@ AlphaISA::MiscRegFile::setIpr(int idx, uint64_t val, ThreadContext *tc)
             if (tc->getKernelStats())
                 tc->getKernelStats()->mode(TheISA::Kernel::kernel, tc);
         }
+#endif
 
       case AlphaISA::IPR_ICM:
         // only write two mode bits - processor mode
@@ -468,27 +476,27 @@ AlphaISA::MiscRegFile::setIpr(int idx, uint64_t val, ThreadContext *tc)
         ipr[idx] = val;
 
         tc->getDTBPtr()->flushAddr(val,
-                                   DTB_ASN_ASN(ipr[AlphaISA::IPR_DTB_ASN]));
+                EV5::DTB_ASN_ASN(ipr[AlphaISA::IPR_DTB_ASN]));
         break;
 
       case AlphaISA::IPR_DTB_TAG: {
           struct AlphaISA::PTE pte;
 
           // FIXME: granularity hints NYI...
-          if (DTB_PTE_GH(ipr[AlphaISA::IPR_DTB_PTE]) != 0)
+          if (EV5::DTB_PTE_GH(ipr[AlphaISA::IPR_DTB_PTE]) != 0)
               panic("PTE GH field != 0");
 
           // write entire quad
           ipr[idx] = val;
 
           // construct PTE for new entry
-          pte.ppn = DTB_PTE_PPN(ipr[AlphaISA::IPR_DTB_PTE]);
-          pte.xre = DTB_PTE_XRE(ipr[AlphaISA::IPR_DTB_PTE]);
-          pte.xwe = DTB_PTE_XWE(ipr[AlphaISA::IPR_DTB_PTE]);
-          pte.fonr = DTB_PTE_FONR(ipr[AlphaISA::IPR_DTB_PTE]);
-          pte.fonw = DTB_PTE_FONW(ipr[AlphaISA::IPR_DTB_PTE]);
-          pte.asma = DTB_PTE_ASMA(ipr[AlphaISA::IPR_DTB_PTE]);
-          pte.asn = DTB_ASN_ASN(ipr[AlphaISA::IPR_DTB_ASN]);
+          pte.ppn = EV5::DTB_PTE_PPN(ipr[AlphaISA::IPR_DTB_PTE]);
+          pte.xre = EV5::DTB_PTE_XRE(ipr[AlphaISA::IPR_DTB_PTE]);
+          pte.xwe = EV5::DTB_PTE_XWE(ipr[AlphaISA::IPR_DTB_PTE]);
+          pte.fonr = EV5::DTB_PTE_FONR(ipr[AlphaISA::IPR_DTB_PTE]);
+          pte.fonw = EV5::DTB_PTE_FONW(ipr[AlphaISA::IPR_DTB_PTE]);
+          pte.asma = EV5::DTB_PTE_ASMA(ipr[AlphaISA::IPR_DTB_PTE]);
+          pte.asn = EV5::DTB_ASN_ASN(ipr[AlphaISA::IPR_DTB_ASN]);
 
           // insert new TAG/PTE value into data TLB
           tc->getDTBPtr()->insert(val, pte);
@@ -499,20 +507,20 @@ AlphaISA::MiscRegFile::setIpr(int idx, uint64_t val, ThreadContext *tc)
           struct AlphaISA::PTE pte;
 
           // FIXME: granularity hints NYI...
-          if (ITB_PTE_GH(val) != 0)
+          if (EV5::ITB_PTE_GH(val) != 0)
               panic("PTE GH field != 0");
 
           // write entire quad
           ipr[idx] = val;
 
           // construct PTE for new entry
-          pte.ppn = ITB_PTE_PPN(val);
-          pte.xre = ITB_PTE_XRE(val);
+          pte.ppn = EV5::ITB_PTE_PPN(val);
+          pte.xre = EV5::ITB_PTE_XRE(val);
           pte.xwe = 0;
-          pte.fonr = ITB_PTE_FONR(val);
-          pte.fonw = ITB_PTE_FONW(val);
-          pte.asma = ITB_PTE_ASMA(val);
-          pte.asn = ITB_ASN_ASN(ipr[AlphaISA::IPR_ITB_ASN]);
+          pte.fonr = EV5::ITB_PTE_FONR(val);
+          pte.fonw = EV5::ITB_PTE_FONW(val);
+          pte.asma = EV5::ITB_PTE_ASMA(val);
+          pte.asn = EV5::ITB_ASN_ASN(ipr[AlphaISA::IPR_ITB_ASN]);
 
           // insert new TAG/PTE value into data TLB
           tc->getITBPtr()->insert(ipr[AlphaISA::IPR_ITB_TAG], pte);
@@ -538,7 +546,7 @@ AlphaISA::MiscRegFile::setIpr(int idx, uint64_t val, ThreadContext *tc)
         ipr[idx] = val;
 
         tc->getITBPtr()->flushAddr(val,
-                                   ITB_ASN_ASN(ipr[AlphaISA::IPR_ITB_ASN]));
+                EV5::ITB_ASN_ASN(ipr[AlphaISA::IPR_ITB_ASN]));
         break;
 
       default:
@@ -558,6 +566,7 @@ AlphaISA::copyIprs(ThreadContext *src, ThreadContext *dest)
     }
 }
 
+#if FULL_SYSTEM
 
 /**
  * Check for special simulator handling of specific PAL calls.
diff --git a/src/arch/alpha/faults.cc b/src/arch/alpha/faults.cc
index 149729351..d81b55b33 100644
--- a/src/arch/alpha/faults.cc
+++ b/src/arch/alpha/faults.cc
@@ -29,13 +29,13 @@
  *          Kevin Lim
  */
 
+#include "arch/alpha/ev5.hh"
 #include "arch/alpha/faults.hh"
+#include "arch/alpha/tlb.hh"
 #include "cpu/thread_context.hh"
 #include "cpu/base.hh"
 #include "base/trace.hh"
-#if FULL_SYSTEM
-#include "arch/alpha/ev5.hh"
-#else
+#if !FULL_SYSTEM
 #include "sim/process.hh"
 #include "mem/page_table.hh"
 #endif
@@ -83,10 +83,6 @@ FaultName DtbAlignmentFault::_name = "unalign";
 FaultVect DtbAlignmentFault::_vect = 0x0301;
 FaultStat DtbAlignmentFault::_count;
 
-FaultName ItbMissFault::_name = "itbmiss";
-FaultVect ItbMissFault::_vect = 0x0181;
-FaultStat ItbMissFault::_count;
-
 FaultName ItbPageFault::_name = "itbmiss";
 FaultVect ItbPageFault::_vect = 0x0181;
 FaultStat ItbPageFault::_count;
@@ -176,6 +172,63 @@ void ItbFault::invoke(ThreadContext * tc)
     AlphaFault::invoke(tc);
 }
 
+#else
+
+void ItbPageFault::invoke(ThreadContext * tc)
+{
+    Process *p = tc->getProcessPtr();
+    Addr physaddr;
+    bool success = p->pTable->translate(pc, physaddr);
+    if(!success) {
+        panic("Tried to execute unmapped address %#x.\n", pc);
+    } else {
+        VAddr vaddr(pc);
+        VAddr paddr(physaddr);
+
+        PTE pte;
+        pte.tag = vaddr.vpn();
+        pte.ppn = paddr.vpn();
+        pte.xre = 15; //This can be read in all modes.
+        pte.xwe = 1; //This can be written only in kernel mode.
+        pte.asn = p->M5_pid; //Address space number.
+        pte.asma = false; //Only match on this ASN.
+        pte.fonr = false; //Don't fault on read.
+        pte.fonw = false; //Don't fault on write.
+        pte.valid = true; //This entry is valid.
+
+        tc->getITBPtr()->insert(vaddr.page(), pte);
+    }
+}
+
+void NDtbMissFault::invoke(ThreadContext * tc)
+{
+    Process *p = tc->getProcessPtr();
+    Addr physaddr;
+    bool success = p->pTable->translate(vaddr, physaddr);
+    if(!success) {
+        p->checkAndAllocNextPage(vaddr);
+        success = p->pTable->translate(vaddr, physaddr);
+    }
+    if(!success) {
+        panic("Tried to access unmapped address %#x.\n", (Addr)vaddr);
+    } else {
+        VAddr paddr(physaddr);
+
+        PTE pte;
+        pte.tag = vaddr.vpn();
+        pte.ppn = paddr.vpn();
+        pte.xre = 15; //This can be read in all modes.
+        pte.xwe = 15; //This can be written in all modes.
+        pte.asn = p->M5_pid; //Address space number.
+        pte.asma = false; //Only match on this ASN.
+        pte.fonr = false; //Don't fault on read.
+        pte.fonw = false; //Don't fault on write.
+        pte.valid = true; //This entry is valid.
+
+        tc->getDTBPtr()->insert(vaddr.page(), pte);
+    }
+}
+
 #endif
 
 } // namespace AlphaISA
diff --git a/src/arch/alpha/faults.hh b/src/arch/alpha/faults.hh
index ed0c3a6b1..49ba25966 100644
--- a/src/arch/alpha/faults.hh
+++ b/src/arch/alpha/faults.hh
@@ -35,9 +35,7 @@
 #include "config/full_system.hh"
 #include "sim/faults.hh"
 
-#if FULL_SYSTEM
 #include "arch/alpha/pagetable.hh"
-#endif
 
 // The design of the "name" and "vect" functions is in sim/faults.hh
 
@@ -140,8 +138,7 @@ class InterruptFault : public AlphaFault
 
 class DtbFault : public AlphaFault
 {
-#if FULL_SYSTEM
-  private:
+  protected:
     AlphaISA::VAddr vaddr;
     uint32_t reqFlags;
     uint64_t flags;
@@ -149,7 +146,6 @@ class DtbFault : public AlphaFault
     DtbFault(AlphaISA::VAddr _vaddr, uint32_t _reqFlags, uint64_t _flags)
         : vaddr(_vaddr), reqFlags(_reqFlags), flags(_flags)
     { }
-#endif
     FaultName name() const = 0;
     FaultVect vect() = 0;
     FaultStat & countStat() = 0;
@@ -165,14 +161,15 @@ class NDtbMissFault : public DtbFault
     static FaultVect _vect;
     static FaultStat _count;
   public:
-#if FULL_SYSTEM
     NDtbMissFault(AlphaISA::VAddr vaddr, uint32_t reqFlags, uint64_t flags)
         : DtbFault(vaddr, reqFlags, flags)
     { }
-#endif
     FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
+#if !FULL_SYSTEM
+    void invoke(ThreadContext * tc);
+#endif
 };
 
 class PDtbMissFault : public DtbFault
@@ -182,11 +179,9 @@ class PDtbMissFault : public DtbFault
     static FaultVect _vect;
     static FaultStat _count;
   public:
-#if FULL_SYSTEM
     PDtbMissFault(AlphaISA::VAddr vaddr, uint32_t reqFlags, uint64_t flags)
         : DtbFault(vaddr, reqFlags, flags)
     { }
-#endif
     FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
@@ -199,11 +194,9 @@ class DtbPageFault : public DtbFault
     static FaultVect _vect;
     static FaultStat _count;
   public:
-#if FULL_SYSTEM
     DtbPageFault(AlphaISA::VAddr vaddr, uint32_t reqFlags, uint64_t flags)
         : DtbFault(vaddr, reqFlags, flags)
     { }
-#endif
     FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
@@ -216,11 +209,9 @@ class DtbAcvFault : public DtbFault
     static FaultVect _vect;
     static FaultStat _count;
   public:
-#if FULL_SYSTEM
     DtbAcvFault(AlphaISA::VAddr vaddr, uint32_t reqFlags, uint64_t flags)
         : DtbFault(vaddr, reqFlags, flags)
     { }
-#endif
     FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
@@ -233,11 +224,9 @@ class DtbAlignmentFault : public DtbFault
     static FaultVect _vect;
     static FaultStat _count;
   public:
-#if FULL_SYSTEM
     DtbAlignmentFault(AlphaISA::VAddr vaddr, uint32_t reqFlags, uint64_t flags)
         : DtbFault(vaddr, reqFlags, flags)
     { }
-#endif
     FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
@@ -245,7 +234,7 @@ class DtbAlignmentFault : public DtbFault
 
 class ItbFault : public AlphaFault
 {
-  private:
+  protected:
     Addr pc;
   public:
     ItbFault(Addr _pc)
@@ -259,21 +248,6 @@ class ItbFault : public AlphaFault
 #endif
 };
 
-class ItbMissFault : public ItbFault
-{
-  private:
-    static FaultName _name;
-    static FaultVect _vect;
-    static FaultStat _count;
-  public:
-    ItbMissFault(Addr pc)
-        : ItbFault(pc)
-    { }
-    FaultName name() const {return _name;}
-    FaultVect vect() {return _vect;}
-    FaultStat & countStat() {return _count;}
-};
-
 class ItbPageFault : public ItbFault
 {
   private:
@@ -287,6 +261,9 @@ class ItbPageFault : public ItbFault
     FaultName name() const {return _name;}
     FaultVect vect() {return _vect;}
     FaultStat & countStat() {return _count;}
+#if !FULL_SYSTEM
+    void invoke(ThreadContext * tc);
+#endif
 };
 
 class ItbAcvFault : public ItbFault
diff --git a/src/arch/alpha/isa_traits.hh b/src/arch/alpha/isa_traits.hh
index 7dc7e5151..53eea5f69 100644
--- a/src/arch/alpha/isa_traits.hh
+++ b/src/arch/alpha/isa_traits.hh
@@ -63,14 +63,13 @@ namespace AlphaISA
     const Addr PageMask = ~(PageBytes - 1);
     const Addr PageOffset = PageBytes - 1;
 
-#if FULL_SYSTEM
 
     ////////////////////////////////////////////////////////////////////////
     //
     //  Translation stuff
     //
 
-   const Addr PteShift = 3;
+    const Addr PteShift = 3;
     const Addr NPtePageShift = PageShift - PteShift;
     const Addr NPtePage = ULL(1) << NPtePageShift;
     const Addr PteMask = NPtePage - 1;
@@ -90,6 +89,8 @@ namespace AlphaISA
     // For loading... XXX This maybe could be USegEnd?? --ali
     const Addr LoadAddrMask = ULL(0xffffffffff);
 
+#if FULL_SYSTEM
+
     ////////////////////////////////////////////////////////////////////////
     //
     //  Interrupt levels
@@ -114,6 +115,8 @@ namespace AlphaISA
         NumInterruptLevels = INTLEVEL_EXTERNAL_MAX
     };
 
+#endif
+
     // EV5 modes
     enum mode_type
     {
@@ -124,8 +127,6 @@ namespace AlphaISA
         mode_number			// number of modes
     };
 
-#endif
-
     // Constants Related to the number of registers
 
     const int NumIntArchRegs = 32;
diff --git a/src/arch/alpha/miscregfile.cc b/src/arch/alpha/miscregfile.cc
index 1af97adcf..cb5875349 100644
--- a/src/arch/alpha/miscregfile.cc
+++ b/src/arch/alpha/miscregfile.cc
@@ -43,9 +43,7 @@ namespace AlphaISA
         SERIALIZE_SCALAR(uniq);
         SERIALIZE_SCALAR(lock_flag);
         SERIALIZE_SCALAR(lock_addr);
-#if FULL_SYSTEM
         SERIALIZE_ARRAY(ipr, NumInternalProcRegs);
-#endif
     }
 
     void
@@ -55,9 +53,7 @@ namespace AlphaISA
         UNSERIALIZE_SCALAR(uniq);
         UNSERIALIZE_SCALAR(lock_flag);
         UNSERIALIZE_SCALAR(lock_addr);
-#if FULL_SYSTEM
         UNSERIALIZE_ARRAY(ipr, NumInternalProcRegs);
-#endif
     }
 
     MiscReg
@@ -74,15 +70,9 @@ namespace AlphaISA
             return lock_addr;
           case MISCREG_INTR:
             return intr_flag;
-#if FULL_SYSTEM
           default:
             assert(misc_reg < NumInternalProcRegs);
             return ipr[misc_reg];
-#else
-          default:
-            panic("Attempt to read an invalid misc register!");
-            return 0;
-#endif
         }
     }
 
@@ -100,14 +90,8 @@ namespace AlphaISA
             return lock_addr;
           case MISCREG_INTR:
             return intr_flag;
-#if FULL_SYSTEM
           default:
             return readIpr(misc_reg, tc);
-#else
-          default:
-            panic("No faulting misc regs in SE mode!");
-            return 0;
-#endif
         }
     }
 
@@ -130,15 +114,10 @@ namespace AlphaISA
           case MISCREG_INTR:
             intr_flag = val;
             return;
-#if FULL_SYSTEM
           default:
             assert(misc_reg < NumInternalProcRegs);
             ipr[misc_reg] = val;
             return;
-#else
-          default:
-            panic("Attempt to write to an invalid misc register!");
-#endif
         }
     }
 
@@ -163,11 +142,7 @@ namespace AlphaISA
             intr_flag = val;
             return;
           default:
-#if FULL_SYSTEM
             setIpr(misc_reg, val, tc);
-#else
-            panic("No registers with side effects in SE mode!");
-#endif
             return;
         }
     }
diff --git a/src/arch/alpha/miscregfile.hh b/src/arch/alpha/miscregfile.hh
index aea702849..022b6404a 100644
--- a/src/arch/alpha/miscregfile.hh
+++ b/src/arch/alpha/miscregfile.hh
@@ -34,7 +34,6 @@
 
 #include "arch/alpha/ipr.hh"
 #include "arch/alpha/types.hh"
-#include "config/full_system.hh"
 #include "sim/host.hh"
 #include "sim/serialize.hh"
 
@@ -70,9 +69,7 @@ namespace AlphaISA
       public:
         MiscRegFile()
         {
-#if FULL_SYSTEM
             initializeIprTable();
-#endif
         }
 
         MiscReg readRegNoEffect(int misc_reg);
@@ -100,7 +97,6 @@ namespace AlphaISA
         void serialize(std::ostream &os);
 
         void unserialize(Checkpoint *cp, const std::string &section);
-#if FULL_SYSTEM
       protected:
         typedef uint64_t InternalProcReg;
 
@@ -110,13 +106,10 @@ namespace AlphaISA
         InternalProcReg readIpr(int idx, ThreadContext *tc);
 
         void setIpr(int idx, InternalProcReg val, ThreadContext *tc);
-#endif
         friend class RegFile;
     };
 
-#if FULL_SYSTEM
     void copyIprs(ThreadContext *src, ThreadContext *dest);
-#endif
 
 }
 
diff --git a/src/arch/alpha/process.cc b/src/arch/alpha/process.cc
index 85619e493..a9848ebb5 100644
--- a/src/arch/alpha/process.cc
+++ b/src/arch/alpha/process.cc
@@ -71,6 +71,12 @@ AlphaLiveProcess::startup()
     argsInit(MachineBytes, VMPageSize);
 
     threadContexts[0]->setIntReg(GlobalPointerReg, objFile->globalPointer());
+    //Opperate in user mode
+    threadContexts[0]->setMiscRegNoEffect(IPR_ICM, 0x18);
+    //No super page mapping
+    threadContexts[0]->setMiscRegNoEffect(IPR_MCSR, 0);
+    //Set this to 0 for now, but it should be unique for each process
+    threadContexts[0]->setMiscRegNoEffect(IPR_DTB_ASN, M5_pid << 57);
 }
 
 
diff --git a/src/arch/alpha/regfile.cc b/src/arch/alpha/regfile.cc
index 3b42ca9bc..2653310d7 100644
--- a/src/arch/alpha/regfile.cc
+++ b/src/arch/alpha/regfile.cc
@@ -94,8 +94,6 @@ namespace AlphaISA
         dest->setMiscRegNoEffect(AlphaISA::MISCREG_LOCKADDR,
                 src->readMiscRegNoEffect(AlphaISA::MISCREG_LOCKADDR));
 
-#if FULL_SYSTEM
         copyIprs(src, dest);
-#endif
     }
 }
diff --git a/src/arch/alpha/utility.hh b/src/arch/alpha/utility.hh
index 5d461a0f9..11357bc44 100644
--- a/src/arch/alpha/utility.hh
+++ b/src/arch/alpha/utility.hh
@@ -115,7 +115,6 @@ namespace AlphaISA
     inline void startupCPU(ThreadContext *tc, int cpuId) {
         tc->activate(0);
     }
-#if FULL_SYSTEM
 
     ////////////////////////////////////////////////////////////////////////
     //
@@ -142,8 +141,9 @@ namespace AlphaISA
     RoundPage(Addr addr)
     { return (addr + PageBytes - 1) & ~(PageBytes - 1); }
 
-    void initCPU(ThreadContext *tc, int cpuId);
     void initIPRs(ThreadContext *tc, int cpuId);
+#if FULL_SYSTEM
+    void initCPU(ThreadContext *tc, int cpuId);
 
     /**
      * Function to check for and process any interrupts.