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, 8 insertions, 5 deletions

diff --git a/src/cpu/o3/commit.hh b/src/cpu/o3/commit.hh
index 60b555269..49ff5cdad 100644
--- a/src/cpu/o3/commit.hh
+++ b/src/cpu/o3/commit.hh
@@ -187,11 +187,14 @@ class DefaultCommit
     /** Initializes stage by sending back the number of free entries. */
     void initStage();
 
-    /** Initializes the switching out of commit. */
-    void switchOut();
+    /** Initializes the draining of commit. */
+    void drain();
+
+    /** Resumes execution after draining. */
+    void resume();
 
     /** Completes the switch out of commit. */
-    void doSwitchOut();
+    void switchOut();
 
     /** Takes over from another CPU's thread. */
     void takeOverFrom();
@@ -383,8 +386,8 @@ class DefaultCommit
     /** Number of Active Threads */
     unsigned numThreads;
 
-    /** Is a switch out pending. */
-    bool switchPending;
+    /** Is a drain pending. */
+    bool drainPending;
 
     /** Is commit switched out. */
     bool switchedOut;