fix interrupting during a quisce on sparc

src/arch/sparc/ua2005.cc:
    fix interrupting when quisced. Since sticks correspond to instructions when not quisced we need to
    check if were suspended and interrupt at the guess time
src/base/traceflags.py:
    add trace flag for Iob
src/cpu/simple/base.cc:
    Use Quisce instead of IPI trace flag
src/dev/sparc/iob.cc:
    add some Dprintfs

--HG--
extra : convert_revision : 72e18fcc750ad1e4b2bb67b19b354eaffc6af6d5

src/arch/sparc/ua2005.cc

@@ -195,6 +195,7 @@ MiscRegFile::setFSReg(int miscReg, const MiscReg &val, ThreadContext *tc)
             panic("No support for setting spec_en bit\n");
         setRegNoEffect(miscReg, bits(val,0,0));
         if (!bits(val,0,0)) {
+            DPRINTF(Quiesce, "Cpu executed quiescing instruction\n");
             // Time to go to sleep
             tc->suspend();
             if (tc->getKernelStats())
@@ -307,7 +308,7 @@ MiscRegFile::processSTickCompare(ThreadContext *tc)
         tc->getCpuPtr()->instCount();
     assert(ticks >= 0 && "stick compare missed interrupt cycle");
 
-    if (ticks == 0) {
+    if (ticks == 0 || tc->status() == ThreadContext::Suspended) {
         DPRINTF(Timer, "STick compare cycle reached at %#x\n",
                 (stick_cmpr & mask(63)));
         if (!(tc->readMiscRegNoEffect(MISCREG_STICK_CMPR) & (ULL(1) << 63))) {
@@ -324,11 +325,15 @@ MiscRegFile::processHSTickCompare(ThreadContext *tc)
     // we're actually at the correct cycle or we need to wait a little while
     // more
     int ticks;
+    if ( tc->status() == ThreadContext::Halted ||
+         tc->status() == ThreadContext::Unallocated)
+       return;
+
     ticks = ((int64_t)(hstick_cmpr & mask(63)) - (int64_t)stick) -
         tc->getCpuPtr()->instCount();
     assert(ticks >= 0 && "hstick compare missed interrupt cycle");
 
-    if (ticks == 0) {
+    if (ticks == 0 || tc->status() == ThreadContext::Suspended) {
         DPRINTF(Timer, "HSTick compare cycle reached at %#x\n",
                 (stick_cmpr & mask(63)));
         if (!(tc->readMiscRegNoEffect(MISCREG_HSTICK_CMPR) & (ULL(1) << 63))) {

src/base/traceflags.py

@@ -116,6 +116,7 @@ baseFlags = [
     'ISP',
     'IdeCtrl',
     'IdeDisk',
+    'Iob',
     'Interrupt',
     'LLSC',
     'LSQ',

src/cpu/simple/base.cc

@@ -301,7 +301,7 @@ BaseSimpleCPU::post_interrupt(int int_num, int index)
     BaseCPU::post_interrupt(int_num, index);
 
     if (thread->status() == ThreadContext::Suspended) {
-                DPRINTF(IPI,"Suspended Processor awoke\n");
+                DPRINTF(Quiesce,"Suspended Processor awoke\n");
         thread->activate();
     }
 }

src/dev/sparc/iob.cc

@@ -192,6 +192,8 @@ Iob::writeIob(PacketPtr pkt)
             data = pkt->get<uint64_t>();
             intMan[index].cpu = bits(data,12,8);
             intMan[index].vector = bits(data,5,0);
+            DPRINTF(Iob, "Wrote IntMan %d cpu %d, vec %d\n", index,
+                    intMan[index].cpu, intMan[index].vector);
             return;
         }
 
@@ -201,11 +203,14 @@ Iob::writeIob(PacketPtr pkt)
             intCtl[index].mask = bits(data,2,2);
             if (bits(data,1,1))
                 intCtl[index].pend = false;
+            DPRINTF(Iob, "Wrote IntCtl %d pend %d cleared %d\n", index,
+                    intCtl[index].pend, bits(data,2,2));
             return;
         }
 
         if (accessAddr == JIntVecAddr) {
             jIntVec = bits(pkt->get<uint64_t>(), 5,0);
+            DPRINTF(Iob, "Wrote jIntVec %d\n", jIntVec);
             return;
         }
 
@@ -237,11 +242,15 @@ Iob::writeJBus(PacketPtr pkt)
             index = (accessAddr - JIntBusyAddr) >> 3;
             data = pkt->get<uint64_t>();
             jIntBusy[index].busy = bits(data,5,5);
+            DPRINTF(Iob, "Wrote jIntBusy index %d busy: %d\n", index,
+                    jIntBusy[index].busy);
             return;
         }
         if (accessAddr == JIntABusyAddr) {
             data = pkt->get<uint64_t>();
             jIntBusy[cpuid].busy = bits(data,5,5);
+            DPRINTF(Iob, "Wrote jIntBusy index %d busy: %d\n", cpuid,
+                    jIntBusy[cpuid].busy);
             return;
         };
 
@@ -256,6 +265,8 @@ Iob::receiveDeviceInterrupt(DeviceId devid)
         return;
     intCtl[devid].mask = true;
     intCtl[devid].pend = true;
+    DPRINTF(Iob, "Receiving Device interrupt: %d for cpu %d vec %d\n",
+            devid, intMan[devid].cpu, intMan[devid].vector);
     ic->post(intMan[devid].cpu, SparcISA::IT_INT_VEC, intMan[devid].vector);
 }
 
@@ -269,6 +280,8 @@ Iob::generateIpi(Type type, int cpu_id, int vector)
 
     switch (type) {
       case 0: // interrupt
+        DPRINTF(Iob, "Generating interrupt because of I/O write to cpu: %d vec %d\n",
+                cpu_id, vector);
         ic->post(cpu_id, SparcISA::IT_INT_VEC, vector);
         break;
       case 1: // reset
@@ -279,9 +292,11 @@ Iob::generateIpi(Type type, int cpu_id, int vector)
         sys->threadContexts[cpu_id]->activate();
         break;
       case 2: // idle -- this means stop executing and don't wake on interrupts
+        DPRINTF(Iob, "Idling CPU because of I/O write cpu: %d\n", cpu_id);
         sys->threadContexts[cpu_id]->halt();
         break;
       case 3: // resume
+        DPRINTF(Iob, "Resuming CPU because of I/O write cpu: %d\n", cpu_id);
         sys->threadContexts[cpu_id]->activate();
         break;
       default:
@@ -297,6 +312,9 @@ Iob::receiveJBusInterrupt(int cpu_id, int source, uint64_t d0, uint64_t d1)
     if (jIntBusy[cpu_id].busy)
         return false;
 
+    DPRINTF(Iob, "Receiving jBus interrupt: %d for cpu %d vec %d\n",
+            source, cpu_id, jIntVec);
+
     jIntBusy[cpu_id].busy = true;
     jIntBusy[cpu_id].source = source;
     jBusData0[cpu_id] = d0;