misc: Reorder sources in util/tlm and rewrite build scripts

* Use one SConstruct to build everything instead of one SConstruct for
  each example.
* Introduce SConscripts for sub-directories.
* Build in 'build' instead of the source tree.
* Build and link to SystemC from the ext/systemc directory. This
  ensures that SystemC does not need to be installed on the host and
  avoids possible issues caused by an incompatible SystemC build.
* Update the README and add some minor fixes

Change-Id: I641ed94f542626864fb7af499ad1be8fd4ad929f
Reviewed-on: https://gem5-review.googlesource.com/3480
Reviewed-by: Matthias Jung <jungma@eit.uni-kl.de>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Jason Lowe-Power <jason@lowepower.com>

1 files changed, 79 insertions, 0 deletions

diff --git a/util/tlm/src/sc_mm.cc b/util/tlm/src/sc_mm.cc
new file mode 100644
index 000000000..f5c07392c
--- /dev/null
+++ b/util/tlm/src/sc_mm.cc
@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2015, University of Kaiserslautern
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *
+ * 2. 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.
+ *
+ * 3. Neither the name of the copyright holder 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 HOLDER
+ * 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:
+ *    Robert Gernhardt
+ *    Matthias Jung
+ */
+
+#include <iostream>
+
+#include "sc_mm.hh"
+
+using namespace std;
+
+namespace Gem5SystemC
+{
+
+MemoryManager::MemoryManager(): numberOfAllocations(0), numberOfFrees(0)
+{
+
+}
+
+MemoryManager::~MemoryManager()
+{
+    for (gp* payload: freePayloads) {
+        delete payload;
+        numberOfFrees++;
+    }
+}
+
+gp*
+MemoryManager::allocate()
+{
+    if (freePayloads.empty()) {
+        numberOfAllocations++;
+        return new gp(this);
+    } else {
+        gp* result = freePayloads.back();
+        freePayloads.pop_back();
+        return result;
+    }
+}
+
+void
+MemoryManager::free(gp* payload)
+{
+    payload->reset(); //clears all extensions
+    freePayloads.push_back(payload);
+}
+
+}