systemc: When sensitive to an event finder, find on all interfaces.

When a process is sensitive to an event finder and that finder is
attached to a port which is bound to multiple interfaces, the process
is supposed to be made sensitive to the event finder function's result
when called on each interface, not just the first one.

Change-Id: I92312e04e60fab7a7ea51c1ed687edabe9768205
Reviewed-on: https://gem5-review.googlesource.com/c/12444
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Gabe Black <gabeblack@google.com>

src/systemc/core/process.hh

@@ -37,6 +37,7 @@
 #include "base/fiber.hh"
 #include "sim/eventq.hh"
 #include "systemc/core/bindinfo.hh"
+#include "systemc/core/event.hh"
 #include "systemc/core/list.hh"
 #include "systemc/core/object.hh"
 #include "systemc/core/sched_event.hh"
@@ -259,7 +260,13 @@ class PendingSensitivityFinder : public PendingSensitivity
     void
     finalize(Sensitivities &s) override
     {
-        s.push_back(new SensitivityEvent(process, &finder->find_event()));
+        const ::sc_core::sc_port_base *port = finder->port();
+        int size = port->size();
+        for (int i = 0; i < size; i++) {
+            ::sc_core::sc_interface *interface = port->_gem5Interface(i);
+            const ::sc_core::sc_event *event = &finder->find_event(interface);
+            s.push_back(new SensitivityEvent(process, event));
+        }
     }
 };
 

src/systemc/ext/core/sc_event.hh

@@ -64,6 +64,7 @@ class sc_event_finder
   public:
     // Should be "implementation defined" but used in the tests.
     virtual const sc_event &find_event(sc_interface *if_p=NULL) const = 0;
+    virtual const sc_port_base *port() const = 0;
 };
 
 template <class IF>
@@ -80,6 +81,8 @@ class sc_event_finder_t : public sc_event_finder
 
     virtual ~sc_event_finder_t() {}
 
+    const sc_port_base *port() const { return _port; }
+
     const sc_event &
     find_event(sc_interface *if_p=NULL) const override
     {

src/systemc/ext/core/sc_port.hh

@@ -42,6 +42,7 @@ namespace sc_gem5
 class BindInfo;
 class Module;
 class PendingSensitivityPort;
+class PendingSensitivityFinder;
 
 };
 
@@ -85,6 +86,7 @@ class sc_port_base : public sc_object
 
   private:
     friend class ::sc_gem5::PendingSensitivityPort;
+    friend class ::sc_gem5::PendingSensitivityFinder;
     friend class ::sc_gem5::Kernel;
 
     void _gem5Finalize();