Create a new CpuEvent class that has a pointer to an execution context in the object and places itself on a global list so

so the events can be migrated on cpu switches.
Create a new wrapper classe called CpuEventWrapper that works like the old wrapper class but calls the function with the xc
parameter
Use new CpuEventWrapper class from tick compare events on sparc

src/arch/sparc/regfile.hh:
    Use new CpuEventWrapper class from tick compare events
src/arch/sparc/ua2005.cc:
    Move definition to to a fullsystem only file, since it is.
src/cpu/base.cc:
    On switch from one cpu to another CpuEvent::replaceExecContext() needs to be called on all (oldxc,newxc) pairs.

--HG--
extra : convert_revision : eecf4540427cc0ddf75e19a3371cf32b56cba0f5

1 files changed, 88 insertions, 0 deletions

diff --git a/src/cpu/cpuevent.hh b/src/cpu/cpuevent.hh
new file mode 100644
index 000000000..10359b121
--- /dev/null
+++ b/src/cpu/cpuevent.hh
@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2006 The Regents of The University of Michigan
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Ali Saidi
+ */
+
+#ifndef __CPU_CPUEVENT_HH__
+#define __CPU_CPUEVENT_HH__
+
+#include <vector>
+#include "sim/eventq.hh"
+
+class ExecContext;
+
+/** This class creates a global list of events than need a pointer to an
+ * execution context. When a switchover takes place the events can be migrated
+ * to the new execution context, otherwise you could have a wake timer interrupt
+ * go off on a switched out cpu or other unfortunate events. This object MUST be
+ * dynamically allocated to avoid it being deleted after a cpu switch happens.
+ * */
+class CpuEvent : public Event
+{
+  private:
+    /** type of global list of cpu events. */
+    typedef std::vector<CpuEvent *> CpuEventList;
+
+    /** Static list of cpu events that is searched every time a cpu switch
+     * happens. */
+    static CpuEventList cpuEventList;
+
+    /** The execution context that is switched to the new cpus. */
+    ExecContext *xc;
+
+  public:
+    CpuEvent(EventQueue *q, ExecContext *_xc, Priority p = Default_Pri)
+        : Event(q, p), xc(_xc)
+    { cpuEventList.push_back(this); }
+
+    /** delete the cpu event from the global list. */
+    ~CpuEvent();
+
+    /** Update all events switching old xc to new xc.
+     * @param oldXc the old exeuction context we are switching from
+     * @param newXc the new execution context we are switching to.
+     */
+    static void replaceExecContext(ExecContext *oldXc, ExecContext *newXc);
+};
+
+template <class T, void (T::* F)(ExecContext *xc)>
+class CpuEventWrapper : public CpuEvent
+{
+  private:
+    T *object;
+
+  public:
+    CpuEventWrapper(T *obj, ExecContext *_xc, EventQueue *q = &mainEventQueue,
+            Priority p = Default_Pri)
+        : CpuEvent(q, _xc, p), object(obj)
+    { }
+    void process() { (object->*F)(xc); }
+};
+
+#endif // __CPU_CPUEVENT_HH__
+