systemc: Handle suspended processes and handle sensitivity overload.

This change keeps track of whether a process would have become ready
but was suspended so that it can become ready when the process is
resumed.

Also, this makes a process ignore its static sensitivity while a
dynamic sensitivity is in place.

Change-Id: If3f6c62f370051e574f81bf227746db8c43527e2
Reviewed-on: https://gem5-review.googlesource.com/11715
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Gabe Black <gabeblack@google.com>

1 files changed, 12 insertions, 2 deletions

diff --git a/src/systemc/core/process.hh b/src/systemc/core/process.hh
index cd92992eb..579ea602f 100644
--- a/src/systemc/core/process.hh
+++ b/src/systemc/core/process.hh
@@ -51,13 +51,12 @@ class Sensitivity
 {
   protected:
     Process *process;
-    void satisfy();
 
   public:
     Sensitivity(Process *p) : process(p) {}
     virtual ~Sensitivity() {}
 
-    virtual void notifyWork(Event *e) { satisfy(); }
+    virtual void notifyWork(Event *e);
     void notify(Event *e);
     void notify() { notify(nullptr); }
 
@@ -290,6 +289,10 @@ class Process : public ::sc_core::sc_object, public ListNode
     void addStatic(PendingSensitivity *);
     void setDynamic(Sensitivity *);
 
+    void satisfySensitivity(Sensitivity *);
+
+    void ready();
+
     virtual Fiber *fiber() { return Fiber::primaryFiber(); }
 
     static Process *newest() { return _newest; }
@@ -317,6 +320,7 @@ class Process : public ::sc_core::sc_object, public ListNode
     bool _terminated;
 
     bool _suspended;
+    bool _suspendedReady;
     bool _disabled;
 
     bool _syncReset;
@@ -332,6 +336,12 @@ class Process : public ::sc_core::sc_object, public ListNode
 };
 
 inline void
+Sensitivity::notifyWork(Event *e)
+{
+    process->satisfySensitivity(this);
+}
+
+inline void
 Sensitivity::notify(Event *e)
 {
     if (!process->disabled())