diff --git a/src/arch/alpha/utility.hh b/src/arch/alpha/utility.hh
index c8a50e8a2..b7844c7eb 100644
--- a/src/arch/alpha/utility.hh
+++ b/src/arch/alpha/utility.hh
@@ -123,6 +123,9 @@ namespace AlphaISA
 
     // Alpha IPR register accessors
     inline bool PcPAL(Addr addr) { return addr & 0x3; }
+    inline void startupCPU(ThreadContext *tc, int cpuId) {
+        tc->activate(0);
+    }
 #if FULL_SYSTEM
 
     ////////////////////////////////////////////////////////////////////////
diff --git a/src/arch/mips/utility.hh b/src/arch/mips/utility.hh
index 56689ba4d..b5c1e31e1 100644
--- a/src/arch/mips/utility.hh
+++ b/src/arch/mips/utility.hh
@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2003-2005 The Regents of The University of Michigan
+ * Copyright (c) 2007 MIPS Technologies, Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -27,6 +28,7 @@
  *
  * Authors: Nathan Binkert
  *          Steve Reinhardt
+ *          Korey Sewell
  */
 
 #ifndef __ARCH_MIPS_UTILITY_HH__
@@ -98,6 +100,11 @@ namespace MipsISA {
         return ExtMachInst(inst);
 #endif
     }
+
+    inline void startupCPU(ThreadContext *tc, int cpuId)
+    {
+        tc->activate(0);
+    }
 };
 
 
diff --git a/src/arch/sparc/isa/decoder.isa b/src/arch/sparc/isa/decoder.isa
index 2e85e1274..70afe19b6 100644
--- a/src/arch/sparc/isa/decoder.isa
+++ b/src/arch/sparc/isa/decoder.isa
@@ -620,10 +620,6 @@ decode OP default Unknown::unknown()
                 }});
                 0x19: Priv::wrstick_cmpr({{StickCmpr = Rs1 ^ Rs2_or_imm13;}});
                 0x1A: Priv::wrstrand_sts_reg({{
-                    if(Pstate<2:> && !Hpstate<2:>)
-                        StrandStsReg = StrandStsReg<63:1> |
-                                (Rs1 ^ Rs2_or_imm13)<0:>;
-                    else
                         StrandStsReg = Rs1 ^ Rs2_or_imm13;
                 }});
                 //0x1A is supposed to be reserved, but it writes the strand
diff --git a/src/arch/sparc/miscregfile.hh b/src/arch/sparc/miscregfile.hh
index 6063c21c8..867f959e1 100644
--- a/src/arch/sparc/miscregfile.hh
+++ b/src/arch/sparc/miscregfile.hh
@@ -163,6 +163,23 @@ namespace SparcISA
         const static int ie = 0x2;
     };
 
+    struct STS {
+        const static int st_idle     = 0x00;
+        const static int st_wait     = 0x01;
+        const static int st_halt     = 0x02;
+        const static int st_run      = 0x05;
+        const static int st_spec_run = 0x07;
+        const static int st_spec_rdy = 0x13;
+        const static int st_ready    = 0x19;
+        const static int active      = 0x01;
+        const static int speculative = 0x04;
+        const static int shft_id     = 8;
+        const static int shft_fsm0   = 31;
+        const static int shft_fsm1   = 26;
+        const static int shft_fsm2   = 21;
+        const static int shft_fsm3   = 16;
+    };
+
 
     const int NumMiscArchRegs = MISCREG_NUMMISCREGS;
     const int NumMiscRegs = MISCREG_NUMMISCREGS;
diff --git a/src/arch/sparc/ua2005.cc b/src/arch/sparc/ua2005.cc
index 6c8a987fe..439f38457 100644
--- a/src/arch/sparc/ua2005.cc
+++ b/src/arch/sparc/ua2005.cc
@@ -26,11 +26,13 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+#include "arch/sparc/kernel_stats.hh"
 #include "arch/sparc/miscregfile.hh"
 #include "base/bitfield.hh"
 #include "base/trace.hh"
 #include "cpu/base.hh"
 #include "cpu/thread_context.hh"
+#include "sim/system.hh"
 
 using namespace SparcISA;
 
@@ -185,10 +187,21 @@ MiscRegFile::setFSReg(int miscReg, const MiscReg &val, ThreadContext *tc)
 #endif
         break;
       case MISCREG_HTSTATE:
-      case MISCREG_STRAND_STS_REG:
         setRegNoEffect(miscReg, val);
         break;
 
+      case MISCREG_STRAND_STS_REG:
+        if (bits(val,2,2))
+            panic("No support for setting spec_en bit\n");
+        setRegNoEffect(miscReg, bits(val,0,0));
+        if (!bits(val,0,0)) {
+            // Time to go to sleep
+            tc->suspend();
+            if (tc->getKernelStats())
+                tc->getKernelStats()->quiesce();
+            }
+        break;
+
       default:
         panic("Invalid write to FS misc register %s\n", getMiscRegName(miscReg));
     }
@@ -197,6 +210,8 @@ MiscRegFile::setFSReg(int miscReg, const MiscReg &val, ThreadContext *tc)
 MiscReg
 MiscRegFile::readFSReg(int miscReg, ThreadContext * tc)
 {
+    uint64_t temp;
+
     switch (miscReg) {
         /* Privileged registers. */
       case MISCREG_QUEUE_CPU_MONDO_HEAD:
@@ -214,7 +229,6 @@ MiscRegFile::readFSReg(int miscReg, ThreadContext * tc)
       case MISCREG_HPSTATE:
       case MISCREG_HINTP:
       case MISCREG_HTSTATE:
-      case MISCREG_STRAND_STS_REG:
       case MISCREG_HSTICK_CMPR:
         return readRegNoEffect(miscReg) ;
 
@@ -223,6 +237,38 @@ MiscRegFile::readFSReg(int miscReg, ThreadContext * tc)
       case MISCREG_HVER:
         return NWindows | MaxTL << 8 | MaxGL << 16;
 
+      case MISCREG_STRAND_STS_REG:
+        System *sys;
+        int x;
+        sys = tc->getSystemPtr();
+
+        temp = readRegNoEffect(miscReg) & (STS::active | STS::speculative);
+        // Check that the CPU array is fully populated (by calling getNumCPus())
+        assert(sys->getNumCPUs() > tc->readCpuId());
+
+        temp |= tc->readCpuId()  << STS::shft_id;
+
+        for (x = tc->readCpuId() & ~3; x < sys->threadContexts.size(); x++) {
+            switch (sys->threadContexts[x]->status()) {
+              case ThreadContext::Active:
+                temp |= STS::st_run << (STS::shft_fsm0 -
+                        ((x & 0x3) * (STS::shft_fsm0-STS::shft_fsm1)));
+                break;
+              case ThreadContext::Suspended:
+                // should this be idle?
+                temp |= STS::st_idle << (STS::shft_fsm0 -
+                        ((x & 0x3) * (STS::shft_fsm0-STS::shft_fsm1)));
+                break;
+              case ThreadContext::Halted:
+                temp |= STS::st_halt << (STS::shft_fsm0 -
+                        ((x & 0x3) * (STS::shft_fsm0-STS::shft_fsm1)));
+                break;
+              default:
+                panic("What state are we in?!\n");
+            } // switch
+        } // for
+
+        return temp;
       default:
         panic("Invalid read to FS misc register\n");
     }
diff --git a/src/arch/sparc/utility.hh b/src/arch/sparc/utility.hh
index 64b91695e..dc9201401 100644
--- a/src/arch/sparc/utility.hh
+++ b/src/arch/sparc/utility.hh
@@ -112,7 +112,20 @@ namespace SparcISA
     inline void initCPU(ThreadContext *tc, int cpuId)
     {
         static Fault por = new PowerOnReset();
-        por->invoke(tc);
+        if (cpuId == 0)
+            por->invoke(tc);
+
+    }
+
+    inline void startupCPU(ThreadContext *tc, int cpuId)
+    {
+#if FULL_SYSTEM
+        // Other CPUs will get activated by IPIs
+        if (cpuId == 0)
+            tc->activate(0);
+#else
+        tc->activate(0);
+#endif
     }
 
 } // namespace SparcISA
diff --git a/src/arch/x86/utility.hh b/src/arch/x86/utility.hh
index 1d9d8d3d5..1fbe1fffe 100644
--- a/src/arch/x86/utility.hh
+++ b/src/arch/x86/utility.hh
@@ -126,6 +126,11 @@ namespace X86ISA
     {
         panic("initCPU not implemented!\n");
     }
+
+    inline void startupCPU(ThreadContext *tc, int cpuId)
+    {
+        tc->activate(0);
+    }
 };
 
 #endif // __ARCH_X86_UTILITY_HH__
diff --git a/src/dev/sparc/iob.cc b/src/dev/sparc/iob.cc
index 2cff02a99..6bd40b631 100644
--- a/src/dev/sparc/iob.cc
+++ b/src/dev/sparc/iob.cc
@@ -38,6 +38,7 @@
 #include <cstring>
 
 #include "arch/sparc/isa_traits.hh"
+#include "arch/sparc/faults.hh"
 #include "base/trace.hh"
 #include "cpu/intr_control.hh"
 #include "dev/sparc/iob.hh"
@@ -45,6 +46,7 @@
 #include "mem/port.hh"
 #include "mem/packet_access.hh"
 #include "sim/builder.hh"
+#include "sim/faults.hh"
 #include "sim/system.hh"
 
 Iob::Iob(Params *p)
@@ -261,13 +263,30 @@ Iob::receiveDeviceInterrupt(DeviceId devid)
 void
 Iob::generateIpi(Type type, int cpu_id, int vector)
 {
-    // Only handle interrupts for the moment... Cpu Idle/reset/resume will be
-    // later
-    if (type != 0)
+    SparcISA::SparcFault<SparcISA::PowerOnReset> *por = new SparcISA::PowerOnReset();
+    if (cpu_id >= sys->getNumCPUs())
         return;
 
-    assert(type == 0);
-    ic->post(cpu_id, SparcISA::IT_INT_VEC, vector);
+    switch (type) {
+      case 0: // interrupt
+        ic->post(cpu_id, SparcISA::IT_INT_VEC, vector);
+        break;
+      case 1: // reset
+        warn("Sending reset to CPU: %d\n", cpu_id);
+        if (vector != por->trapType())
+            panic("Don't know how to set non-POR reset to cpu\n");
+        por->invoke(sys->threadContexts[cpu_id]);
+        sys->threadContexts[cpu_id]->activate();
+        break;
+      case 2: // idle -- this means stop executing and don't wake on interrupts
+        sys->threadContexts[cpu_id]->halt();
+        break;
+      case 3: // resume
+        sys->threadContexts[cpu_id]->activate();
+        break;
+      default:
+        panic("Invalid type to generate ipi\n");
+    }
 }
 
 bool
diff --git a/src/sim/system.cc b/src/sim/system.cc
index 1a87e1754..2d0eaaf5b 100644
--- a/src/sim/system.cc
+++ b/src/sim/system.cc
@@ -33,6 +33,7 @@
 
 #include "arch/isa_traits.hh"
 #include "arch/remote_gdb.hh"
+#include "arch/utility.hh"
 #include "base/loader/object_file.hh"
 #include "base/loader/symtab.hh"
 #include "base/trace.hh"
@@ -203,7 +204,7 @@ System::startup()
 {
     int i;
     for (i = 0; i < threadContexts.size(); i++)
-        threadContexts[i]->activate(0);
+        TheISA::startupCPU(threadContexts[i], i);
 }
 
 void