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, 10 insertions, 4 deletions

diff --git a/src/cpu/o3/iew_impl.hh b/src/cpu/o3/iew_impl.hh
index 118038b65..c3aa748ae 100644
--- a/src/cpu/o3/iew_impl.hh
+++ b/src/cpu/o3/iew_impl.hh
@@ -355,15 +355,21 @@ DefaultIEW<Impl>::setScoreboard(Scoreboard *sb_ptr)
 
 template <class Impl>
 void
-DefaultIEW<Impl>::switchOut()
+DefaultIEW<Impl>::drain()
 {
-    // IEW is ready to switch out at any time.
-    cpu->signalSwitched();
+    // IEW is ready to drain at any time.
+    cpu->signalDrained();
 }
 
 template <class Impl>
 void
-DefaultIEW<Impl>::doSwitchOut()
+DefaultIEW<Impl>::resume()
+{
+}
+
+template <class Impl>
+void
+DefaultIEW<Impl>::switchOut()
 {
     // Clear any state.
     switchedOut = true;