Add the capability to read and write memory trace files. Currently is cycle accurate for a single thread FullCPU.

--HG--
extra : convert_revision : f8fe545313eb307cc6f5ff2c23894cc9870b1d5b

1 files changed, 93 insertions, 0 deletions

diff --git a/cpu/trace/reader/m5_reader.cc b/cpu/trace/reader/m5_reader.cc
new file mode 100644
index 000000000..d6ec7be50
--- /dev/null
+++ b/cpu/trace/reader/m5_reader.cc
@@ -0,0 +1,93 @@
+/*
+ * Copyright (c) 2003-2004 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.
+ */
+
+/**
+ * @file
+ * Declaration of a memory trace reader for a M5 memory trace.
+ */
+
+#include "cpu/trace/reader/m5_reader.hh"
+#include "mem/trace/m5_format.hh"
+#include "mem/mem_cmd.hh"
+#include "sim/builder.hh"
+
+using namespace std;
+
+M5Reader::M5Reader(const string &name, const string &filename)
+    : MemTraceReader(name)
+{
+    traceFile.open(filename.c_str(), ios::binary);
+}
+
+Tick
+M5Reader::getNextReq(MemReqPtr &req)
+{
+    M5Format ref;
+
+    MemReqPtr tmp_req;
+    // Need to read EOF char before eof() will return true.
+    traceFile.read((char*) &ref, sizeof(ref));
+    if (!traceFile.eof()) {
+        //traceFile.read((char*) &ref, sizeof(ref));
+        int gcount = traceFile.gcount();
+        assert(gcount != 0 || traceFile.eof());
+        assert(gcount == sizeof(ref));
+        assert(ref.cmd < 12);
+        tmp_req = new MemReq();
+        tmp_req->paddr = ref.paddr;
+        tmp_req->asid = ref.asid;
+        tmp_req->cmd = (MemCmdEnum)ref.cmd;
+        tmp_req->size = ref.size;
+        tmp_req->dest = ref.dest;
+    } else {
+        ref.cycle = 0;
+    }
+    req = tmp_req;
+    return ref.cycle;
+}
+
+BEGIN_DECLARE_SIM_OBJECT_PARAMS(M5Reader)
+
+    Param<string> filename;
+
+END_DECLARE_SIM_OBJECT_PARAMS(M5Reader)
+
+
+BEGIN_INIT_SIM_OBJECT_PARAMS(M5Reader)
+
+    INIT_PARAM(filename, "trace file")
+
+END_INIT_SIM_OBJECT_PARAMS(M5Reader)
+
+
+CREATE_SIM_OBJECT(M5Reader)
+{
+    return new M5Reader(getInstanceName(), filename);
+}
+
+REGISTER_SIM_OBJECT("M5Reader", M5Reader)