Make FullCPU schedule its TickEvent when one of its contexts becomes active.

This fixes detailed-mpboot, which was broken as of my last change.
Also clean up some of the ExecContext status initialization.

cpu/base_cpu.hh:
    CPU::execCtxStatusChg() now takes thread_num as an arg so the CPU knows
    which execContext had the status change.
    BaseCPU::registerExecContexts() no longer needs to be virtual.
cpu/exec_context.cc:
    Initialize _status directly... don't use setStatus() as this will notify the CPU
    of the change before it is ready.
    CPU::execCtxStatusChg() now takes thread_num as an arg so the CPU knows
    which execContext had the status change.
cpu/exec_context.hh:
    Don't need initStatus() any more.
cpu/simple_cpu/simple_cpu.cc:
    Move execCtxStatusChg() from header to .cc file.
    No longer need specialized version of registerExecContexts to schedule TickEvent.
cpu/simple_cpu/simple_cpu.hh:
    Move execCtxStatusChg() from header to .cc file.
    CPU::execCtxStatusChg() now takes thread_num as arg (must be 0 for SimpleCPU).
    No longer need specialized version of registerExecContexts to schedule TickEvent.
kern/tru64/tru64_system.cc:
    Don't need initRegs; the PC etc. get initialized in the CPU constructor.
    ExecContexts start out as Unallocated, so no need to set them to Unallocated here.
kern/tru64/tru64_system.hh:
    Don't need initRegs; the PC etc. get initialized in the CPU constructor.
sim/prog.cc:
    ExecContexts start out as Unallocated, so no need to set them to Unallocated here.

--HG--
extra : convert_revision : e960ebbeb845960344633798e251b6c8bf1c0378

2 files changed, 13 insertions, 29 deletions

diff --git a/cpu/simple_cpu/simple_cpu.cc b/cpu/simple_cpu/simple_cpu.cc
index 41e3de24e..891e6cdb3 100644
--- a/cpu/simple_cpu/simple_cpu.cc
+++ b/cpu/simple_cpu/simple_cpu.cc
@@ -164,25 +164,6 @@ SimpleCPU::~SimpleCPU()
 
 
 void
-SimpleCPU::registerExecContexts()
-{
-    BaseCPU::registerExecContexts();
-
-    // if any of this CPU's ExecContexts are active, mark the CPU as
-    // running and schedule its tick event.
-    for (int i = 0; i < execContexts.size(); ++i) {
-        ExecContext *xc = execContexts[i];
-        if (xc->status() == ExecContext::Active && _status != Running) {
-            _status = Running;
-            // this should only happen at initialization time
-            assert(curTick == 0);
-            tickEvent.schedule(0);
-        }
-    }
-}
-
-
-void
 SimpleCPU::switchOut()
 {
     _status = SwitchedOut;
@@ -213,6 +194,18 @@ SimpleCPU::takeOverFrom(BaseCPU *oldCPU)
 
 
 void
+SimpleCPU::execCtxStatusChg(int thread_num) {
+    assert(thread_num == 0);
+    assert(xc);
+
+    if (xc->status() == ExecContext::Active)
+        setStatus(Running);
+    else
+        setStatus(Idle);
+}
+
+
+void
 SimpleCPU::regStats()
 {
     BaseCPU::regStats();
diff --git a/cpu/simple_cpu/simple_cpu.hh b/cpu/simple_cpu/simple_cpu.hh
index e1b351cab..60c038163 100644
--- a/cpu/simple_cpu/simple_cpu.hh
+++ b/cpu/simple_cpu/simple_cpu.hh
@@ -136,8 +136,6 @@ class SimpleCPU : public BaseCPU
     // execution context
     ExecContext *xc;
 
-    void registerExecContexts();
-
     void switchOut();
     void takeOverFrom(BaseCPU *oldCPU);
 
@@ -178,14 +176,7 @@ class SimpleCPU : public BaseCPU
 
     Status status() const { return _status; }
 
-    virtual void execCtxStatusChg() {
-        if (xc) {
-            if (xc->status() == ExecContext::Active)
-                setStatus(Running);
-            else
-                setStatus(Idle);
-        }
-    }
+    virtual void execCtxStatusChg(int thread_num);
 
     void setStatus(Status new_status) {
         Status old_status = status();