Get rid of the Unallocated thread context state.

Basically merge it in with Halted.
Also had to get rid of a few other functions that
called ThreadContext::deallocate(), including:
 - InOrderCPU's setThreadRescheduleCondition.
 - ThreadContext::exit().  This function was there to avoid terminating
   simulation when one thread out of a multi-thread workload exits, but we
   need to find a better (non-cpu-centric) way.

2 files changed, 1 insertions, 39 deletions

diff --git a/src/cpu/o3/thread_context.hh b/src/cpu/o3/thread_context.hh
index c402e8fd9..e7c9c3b8f 100755
--- a/src/cpu/o3/thread_context.hh
+++ b/src/cpu/o3/thread_context.hh
@@ -122,9 +122,6 @@ class O3ThreadContext : public ThreadContext
     /** Set the status to Suspended. */
     virtual void suspend(int delay = 0);
 
-    /** Set the status to Unallocated. */
-    virtual void deallocate(int delay = 0);
-
     /** Set the status to Halted. */
     virtual void halt(int delay = 0);
 
@@ -273,22 +270,6 @@ class O3ThreadContext : public ThreadContext
 #endif
         this->cpu->setNextNPC(val, this->thread->threadId());
     }
-
-    /** This function exits the thread context in the CPU and returns
-     * 1 if the CPU has no more active threads (meaning it's OK to exit);
-     * Used in syscall-emulation mode when a thread executes the 'exit'
-     * syscall.
-     */
-    virtual int exit()
-    {
-        this->deallocate();
-
-        // If there are still threads executing in the system
-        if (this->cpu->numActiveThreads())
-            return 0; // don't exit simulation
-        else
-            return 1; // exit simulation
-    }
 };
 
 #endif
diff --git a/src/cpu/o3/thread_context_impl.hh b/src/cpu/o3/thread_context_impl.hh
index fc8b66b83..07140a19f 100755
--- a/src/cpu/o3/thread_context_impl.hh
+++ b/src/cpu/o3/thread_context_impl.hh
@@ -84,7 +84,7 @@ O3ThreadContext<Impl>::takeOverFrom(ThreadContext *old_context)
     cpu->lockFlag = false;
 #endif
 
-    old_context->setStatus(ThreadContext::Unallocated);
+    old_context->setStatus(ThreadContext::Halted);
 
     thread->inSyscall = false;
     thread->trapPending = false;
@@ -104,11 +104,6 @@ O3ThreadContext<Impl>::activate(int delay)
     thread->lastActivate = curTick;
 #endif
 
-    if (thread->status() == ThreadContext::Unallocated) {
-        cpu->activateWhenReady(thread->threadId());
-        return;
-    }
-
     thread->setStatus(ThreadContext::Active);
 
     // status() == Suspended
@@ -144,20 +139,6 @@ O3ThreadContext<Impl>::suspend(int delay)
 
 template <class Impl>
 void
-O3ThreadContext<Impl>::deallocate(int delay)
-{
-    DPRINTF(O3CPU, "Calling deallocate on Thread Context %d delay %d\n",
-            threadId(), delay);
-
-    if (thread->status() == ThreadContext::Unallocated)
-        return;
-
-    thread->setStatus(ThreadContext::Unallocated);
-    cpu->deallocateContext(thread->threadId(), true, delay);
-}
-
-template <class Impl>
-void
 O3ThreadContext<Impl>::halt(int delay)
 {
     DPRINTF(O3CPU, "Calling halt on Thread Context %d\n",