1 files changed, 109 insertions, 0 deletions
diff --git a/src/cpu/o3/scoreboard.cc b/src/cpu/o3/scoreboard.cc
new file mode 100644
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+++ b/src/cpu/o3/scoreboard.cc
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+/*
+ * Copyright (c) 2005-2006 The Regents of The University of Michigan
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Korey Sewell
+ *          Kevin Lim
+ */
+
+#include "cpu/o3/scoreboard.hh"
+
+Scoreboard::Scoreboard(unsigned activeThreads,
+                       unsigned _numLogicalIntRegs,
+                       unsigned _numPhysicalIntRegs,
+                       unsigned _numLogicalFloatRegs,
+                       unsigned _numPhysicalFloatRegs,
+                       unsigned _numMiscRegs,
+                       unsigned _zeroRegIdx)
+    : numLogicalIntRegs(_numLogicalIntRegs),
+      numPhysicalIntRegs(_numPhysicalIntRegs),
+      numLogicalFloatRegs(_numLogicalFloatRegs),
+      numPhysicalFloatRegs(_numPhysicalFloatRegs),
+      numMiscRegs(_numMiscRegs),
+      zeroRegIdx(_zeroRegIdx)
+{
+    //Get Register Sizes
+    numLogicalRegs = numLogicalIntRegs  + numLogicalFloatRegs;
+    numPhysicalRegs = numPhysicalIntRegs  + numPhysicalFloatRegs;
+
+    //Resize scoreboard appropriately
+    regScoreBoard.resize(numPhysicalRegs + (numMiscRegs * activeThreads));
+
+    //Initialize values
+    for (int i=0; i < numLogicalIntRegs * activeThreads; i++) {
+        regScoreBoard[i] = 1;
+    }
+
+    for (int i= numPhysicalIntRegs;
+         i < numPhysicalIntRegs + (numLogicalFloatRegs * activeThreads);
+         i++) {
+        regScoreBoard[i] = 1;
+    }
+
+    for (int i = numPhysicalRegs;
+         i < numPhysicalRegs + (numMiscRegs * activeThreads);
+         i++) {
+        regScoreBoard[i] = 1;
+    }
+}
+
+std::string
+Scoreboard::name() const
+{
+    return "cpu.scoreboard";
+}
+
+bool
+Scoreboard::getReg(PhysRegIndex phys_reg)
+{
+    // Always ready if int or fp zero reg.
+    if (phys_reg == zeroRegIdx ||
+        phys_reg == (zeroRegIdx + numPhysicalIntRegs)) {
+        return 1;
+    }
+
+    return regScoreBoard[phys_reg];
+}
+
+void
+Scoreboard::setReg(PhysRegIndex phys_reg)
+{
+    DPRINTF(Scoreboard, "Setting reg %i as ready\n", phys_reg);
+
+    regScoreBoard[phys_reg] = 1;
+}
+
+void
+Scoreboard::unsetReg(PhysRegIndex ready_reg)
+{
+    if (ready_reg == zeroRegIdx ||
+        ready_reg == (zeroRegIdx + numPhysicalIntRegs)) {
+        // Don't do anything if int or fp zero reg.
+        return;
+    }
+
+    regScoreBoard[ready_reg] = 0;
+}