O3 IEW: Make incrWb and decrWb clearer

[gem5.git] / src / cpu / base.hh

diff --git a/src/cpu/base.hh b/src/cpu/base.hh
index 633b7f2a70cf7eca0992a40b032e8a65d8814494..34b23cea07a7ed8eaa6ff7305ba842f8399fdd61 100644 (file)
--- a/src/cpu/base.hh
+++ b/src/cpu/base.hh
@@ -323,6 +323,17 @@ class BaseCPU : public MemObject
      */
     virtual void takeOverFrom(BaseCPU *cpu);
 
+    /**
+     * Flush all TLBs in the CPU.
+     *
+     * This method is mainly used to flush stale translations when
+     * switching CPUs. It is also exported to the Python world to
+     * allow it to request a TLB flush after draining the CPU to make
+     * it easier to compare traces when debugging
+     * handover/checkpointing.
+     */
+    void flushTLBs();
+
     /**
      * Determine if the CPU is switched out.
      *
@@ -354,17 +365,47 @@ class BaseCPU : public MemObject
 
     /**
      * Serialize this object to the given output stream.
+     *
+     * @note CPU models should normally overload the serializeThread()
+     * method instead of the serialize() method as this provides a
+     * uniform data format for all CPU models and promotes better code
+     * reuse.
+     *
      * @param os The stream to serialize to.
      */
     virtual void serialize(std::ostream &os);
 
     /**
      * Reconstruct the state of this object from a checkpoint.
+     *
+     * @note CPU models should normally overload the
+     * unserializeThread() method instead of the unserialize() method
+     * as this provides a uniform data format for all CPU models and
+     * promotes better code reuse.
+
      * @param cp The checkpoint use.
-     * @param section The section name of this object
+     * @param section The section name of this object.
      */
     virtual void unserialize(Checkpoint *cp, const std::string &section);
 
+    /**
+     * Serialize a single thread.
+     *
+     * @param os The stream to serialize to.
+     * @param tid ID of the current thread.
+     */
+    virtual void serializeThread(std::ostream &os, ThreadID tid) {};
+
+    /**
+     * Unserialize one thread.
+     *
+     * @param cp The checkpoint use.
+     * @param section The section name of this thread.
+     * @param tid ID of the current thread.
+     */
+    virtual void unserializeThread(Checkpoint *cp, const std::string &section,
+                                   ThreadID tid) {};
+
     /**
      * Return pointer to CPU's branch predictor (NULL if none).
      * @return Branch predictor pointer.