Support for draining, and the new method of switching out. Now switching out happens after the pipeline has been drained, deferring the three way handshake to the normal drain mechanism. The calls of switchOut() and takeOverFrom() both take action immediately.

src/cpu/o3/commit.hh:
src/cpu/o3/commit_impl.hh:
src/cpu/o3/cpu.cc:
src/cpu/o3/cpu.hh:
src/cpu/o3/decode.hh:
src/cpu/o3/decode_impl.hh:
src/cpu/o3/fetch.hh:
src/cpu/o3/fetch_impl.hh:
src/cpu/o3/iew.hh:
src/cpu/o3/iew_impl.hh:
src/cpu/o3/rename.hh:
src/cpu/o3/rename_impl.hh:
    Support for draining, new method of switching out.

--HG--
extra : convert_revision : 05bf8b271ec85b3e2c675c3bed6c42aeba21f465

1 files changed, 7 insertions, 1 deletions

diff --git a/src/cpu/o3/decode.hh b/src/cpu/o3/decode.hh
index 1edf3335d..1e96f1884 100644
--- a/src/cpu/o3/decode.hh
+++ b/src/cpu/o3/decode.hh
@@ -109,8 +109,14 @@ class DefaultDecode
     /** Sets pointer to list of active threads. */
     void setActiveThreads(std::list<unsigned> *at_ptr);
 
+    /** Drains the decode stage. */
+    void drain();
+
+    /** Resumes execution after a drain. */
+    void resume() { }
+
     /** Switches out the decode stage. */
-    void switchOut();
+    void switchOut() { }
 
     /** Takes over from another CPU's thread. */
     void takeOverFrom();