1 files changed, 28 insertions, 2 deletions
diff --git a/src/cpu/o3/cpu_policy.hh b/src/cpu/o3/cpu_policy.hh
index 4ea4daee6..32a0adcf1 100644
--- a/src/cpu/o3/cpu_policy.hh
+++ b/src/cpu/o3/cpu_policy.hh
@@ -50,24 +50,50 @@
 
 #include "cpu/o3/comm.hh"
 
+/**
+ * Struct that defines the key classes to be used by the CPU.  All
+ * classes use the typedefs defined here to determine what are the
+ * classes of the other stages and communication buffers.  In order to
+ * change a structure such as the IQ, simply change the typedef here
+ * to use the desired class instead, and recompile.  In order to
+ * create a different CPU to be used simultaneously with this one, see
+ * the alpha_impl.hh file for instructions.
+ */
 template<class Impl>
 struct SimpleCPUPolicy
 {
-    typedef TwobitBPredUnit<Impl> BPredUnit;
+    /** Typedef for the branch prediction unit (which includes the BP,
+     * RAS, and BTB).
+     */
+    typedef BPredUnit<Impl> BPredUnit;
+    /** Typedef for the register file.  Most classes assume a unified
+     * physical register file.
+     */
     typedef PhysRegFile<Impl> RegFile;
+    /** Typedef for the freelist of registers. */
     typedef SimpleFreeList FreeList;
+    /** Typedef for the rename map. */
     typedef SimpleRenameMap RenameMap;
+    /** Typedef for the ROB. */
     typedef ROB<Impl> ROB;
+    /** Typedef for the instruction queue/scheduler. */
     typedef InstructionQueue<Impl> IQ;
+    /** Typedef for the memory dependence unit. */
     typedef MemDepUnit<StoreSet, Impl> MemDepUnit;
+    /** Typedef for the LSQ. */
     typedef LSQ<Impl> LSQ;
+    /** Typedef for the thread-specific LSQ units. */
     typedef LSQUnit<Impl> LSQUnit;
 
-
+    /** Typedef for fetch. */
     typedef DefaultFetch<Impl> Fetch;
+    /** Typedef for decode. */
     typedef DefaultDecode<Impl> Decode;
+    /** Typedef for rename. */
     typedef DefaultRename<Impl> Rename;
+    /** Typedef for Issue/Execute/Writeback. */
     typedef DefaultIEW<Impl> IEW;
+    /** Typedef for commit. */
     typedef DefaultCommit<Impl> Commit;
 
     /** The struct for communication between fetch and decode. */