cpu: implement a bi-mode branch predictor

[gem5.git] / src / cpu / thread_state.cc

diff --git a/src/cpu/thread_state.cc b/src/cpu/thread_state.cc
index 9525861e5518134f846fd9a8263ae84be22847da..7953b53c85e861d9fbb67ef893f01bd6463d61e5 100644 (file)
--- a/src/cpu/thread_state.cc
+++ b/src/cpu/thread_state.cc
@@ -28,26 +28,124 @@
  * Authors: Kevin Lim
  */
 
+#include "arch/kernel_stats.hh"
 #include "base/output.hh"
+#include "cpu/base.hh"
 #include "cpu/profile.hh"
+#include "cpu/quiesce_event.hh"
 #include "cpu/thread_state.hh"
+#include "mem/fs_translating_port_proxy.hh"
+#include "mem/port.hh"
+#include "mem/port_proxy.hh"
+#include "mem/se_translating_port_proxy.hh"
+#include "sim/full_system.hh"
+#include "sim/serialize.hh"
+#include "sim/system.hh"
 
-#if FULL_SYSTEM
-ThreadState::ThreadState(int _cpuId, int _tid)
-    : cpuId(_cpuId), tid(_tid), lastActivate(0), lastSuspend(0),
+ThreadState::ThreadState(BaseCPU *cpu, ThreadID _tid, Process *_process)
+    : numInst(0), numOp(0), numLoad(0), _status(ThreadContext::Halted),
+      baseCpu(cpu), _threadId(_tid), lastActivate(0), lastSuspend(0),
       profile(NULL), profileNode(NULL), profilePC(0), quiesceEvent(NULL),
-      funcExeInst(0), storeCondFailures(0)
-#else
-ThreadState::ThreadState(int _cpuId, int _tid, MemObject *mem,
-                         Process *_process, short _asid)
-    : cpuId(_cpuId), tid(_tid), lastActivate(0), lastSuspend(0),
-      process(_process), asid(_asid),
-      funcExeInst(0), storeCondFailures(0)
-#endif
+      kernelStats(NULL), process(_process), physProxy(NULL), virtProxy(NULL),
+      proxy(NULL), funcExeInst(0), storeCondFailures(0)
 {
 }
 
-#if FULL_SYSTEM
+ThreadState::~ThreadState()
+{
+    if (physProxy != NULL)
+        delete physProxy;
+    if (virtProxy != NULL)
+        delete virtProxy;
+    if (proxy != NULL)
+        delete proxy;
+}
+
+void
+ThreadState::serialize(std::ostream &os)
+{
+    SERIALIZE_ENUM(_status);
+    // thread_num and cpu_id are deterministic from the config
+    SERIALIZE_SCALAR(funcExeInst);
+
+    if (!FullSystem)
+        return;
+
+    Tick quiesceEndTick = 0;
+    if (quiesceEvent->scheduled())
+        quiesceEndTick = quiesceEvent->when();
+    SERIALIZE_SCALAR(quiesceEndTick);
+    if (kernelStats)
+        kernelStats->serialize(os);
+}
+
+void
+ThreadState::unserialize(Checkpoint *cp, const std::string &section)
+{
+
+    UNSERIALIZE_ENUM(_status);
+    // thread_num and cpu_id are deterministic from the config
+    UNSERIALIZE_SCALAR(funcExeInst);
+
+    if (!FullSystem)
+        return;
+
+    Tick quiesceEndTick;
+    UNSERIALIZE_SCALAR(quiesceEndTick);
+    if (quiesceEndTick)
+        baseCpu->schedule(quiesceEvent, quiesceEndTick);
+    if (kernelStats)
+        kernelStats->unserialize(cp, section);
+}
+
+void
+ThreadState::initMemProxies(ThreadContext *tc)
+{
+    // The port proxies only refer to the data port on the CPU side
+    // and can safely be done at init() time even if the CPU is not
+    // connected, i.e. when restoring from a checkpoint and later
+    // switching the CPU in.
+    if (FullSystem) {
+        assert(physProxy == NULL);
+        // This cannot be done in the constructor as the thread state
+        // itself is created in the base cpu constructor and the
+        // getDataPort is a virtual function
+        physProxy = new PortProxy(baseCpu->getDataPort(),
+                                  baseCpu->cacheLineSize());
+
+        assert(virtProxy == NULL);
+        virtProxy = new FSTranslatingPortProxy(tc);
+    } else {
+        assert(proxy == NULL);
+        proxy = new SETranslatingPortProxy(baseCpu->getDataPort(),
+                                           process,
+                                           SETranslatingPortProxy::NextPage);
+    }
+}
+
+PortProxy &
+ThreadState::getPhysProxy()
+{
+    assert(FullSystem);
+    assert(physProxy != NULL);
+    return *physProxy;
+}
+
+FSTranslatingPortProxy &
+ThreadState::getVirtProxy()
+{
+    assert(FullSystem);
+    assert(virtProxy != NULL);
+    return *virtProxy;
+}
+
+SETranslatingPortProxy &
+ThreadState::getMemProxy()
+{
+    assert(!FullSystem);
+    assert(proxy != NULL);
+    return *proxy;
+}
 
 void
 ThreadState::profileClear()
@@ -62,5 +160,3 @@ ThreadState::profileSample()
     if (profile)
         profile->sample(profileNode, profilePC);
 }
-
-#endif