InOrder: Import new inorder CPU model from MIPS.

This model currently only works in MIPS_SE mode, so it will take some effort
to clean it up and make it generally useful. Hopefully people are willing to
help make that happen!

1 files changed, 98 insertions, 0 deletions

diff --git a/src/cpu/inorder/resources/agen_unit.cc b/src/cpu/inorder/resources/agen_unit.cc
new file mode 100644
index 000000000..8e3d25656
--- /dev/null
+++ b/src/cpu/inorder/resources/agen_unit.cc
@@ -0,0 +1,98 @@
+/*
+ * Copyright (c) 2007 MIPS Technologies, Inc.
+ * 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
+ *
+ */
+
+#include "cpu/inorder/resources/agen_unit.hh"
+
+AGENUnit::AGENUnit(std::string res_name, int res_id, int res_width,
+                   int res_latency, InOrderCPU *_cpu, ThePipeline::Params *params)
+    : Resource(res_name, res_id, res_width, res_latency, _cpu)
+{ }
+
+void
+AGENUnit::execute(int slot_num)
+{
+    ResourceRequest* agen_req = reqMap[slot_num];
+    DynInstPtr inst = reqMap[slot_num]->inst;
+    Fault fault = reqMap[slot_num]->fault;
+    int tid;
+    int seq_num = inst->seqNum;
+
+    tid = inst->readTid();
+    agen_req->fault = NoFault;
+
+    switch (agen_req->cmd)
+    {
+      case GenerateAddr:
+        {
+            // Load/Store Instruction
+            if (inst->isMemRef()) {
+                DPRINTF(Resource, "[tid:%i] Generating Address for [sn:%i] (%s).\n",
+                    tid, inst->seqNum, inst->staticInst->getName());
+
+
+                // We are not handdling Prefetches quite yet
+                if (inst->isDataPrefetch() || inst->isInstPrefetch()) {
+                    panic("Prefetches arent handled yet.\n");
+                } else {
+                    if (inst->isLoad()) {
+                        fault = inst->calcEA();
+                        inst->setMemAddr(inst->getEA());
+                        //inst->setExecuted();
+
+                        DPRINTF(Resource, "[tid:%i] [sn:%i] Effective address calculated to be: "
+                                "%#x.\n", tid, inst->seqNum, inst->getEA());
+                    } else if (inst->isStore()) {
+                        fault = inst->calcEA();
+                        inst->setMemAddr(inst->getEA());
+
+                        DPRINTF(Resource, "[tid:%i] [sn:%i] Effective address calculated to be: "
+                                "%#x.\n", tid, inst->seqNum, inst->getEA());
+                    } else {
+                        panic("Unexpected memory type!\n");
+                    }
+
+                    if (fault == NoFault) {
+                        agen_req->done();
+                    } else {
+                        fatal("%s encountered @ [sn:%i]",fault->name(), seq_num);
+                    }
+                }
+            } else {
+                DPRINTF(Resource, "[tid:] Ignoring non-memory instruction [sn:%i].\n", tid, seq_num);
+                agen_req->done();
+            }
+        }
+        break;
+
+      default:
+        fatal("Unrecognized command to %s", resName);
+    }
+}