systemc: Seperate out the sc_main fiber and its bookkeeping.

By pulling out the sc_main fiber (scMainFiber), we can make it
available to different entities in the simulator and avoid having to
have parallel bookkeeping.

Also this will make it possible to hook into sc_main without putting
the code in sc_main.cc.

Change-Id: I7689441424238e9b2e4d2b48e945dea35fd8cc5d
Reviewed-on: https://gem5-review.googlesource.com/c/13977
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Gabe Black <gabeblack@google.com>

1 files changed, 70 insertions, 0 deletions

diff --git a/src/systemc/core/sc_main_fiber.hh b/src/systemc/core/sc_main_fiber.hh
new file mode 100644
index 000000000..2e89f11df
--- /dev/null
+++ b/src/systemc/core/sc_main_fiber.hh
@@ -0,0 +1,70 @@
+/*
+ * Copyright 2018 Google, Inc.
+ *
+ * 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: Gabe Black
+ */
+
+#ifndef __SYSTEMC_CORE_SC_MAIN_FIBER_HH__
+#define __SYSTEMC_CORE_SC_MAIN_FIBER_HH__
+
+#include "base/fiber.hh"
+#include "base/logging.hh"
+
+namespace sc_gem5
+{
+
+class ScMainFiber : public Fiber
+{
+  private:
+    int _argc = 0;
+    char **_argv = NULL;
+    std::string _resultStr;
+    int _resultInt = 1;
+
+    bool _called = false;
+
+  public:
+    int argc() { return _argc; }
+    const char *const *argv() { return _argv; }
+    std::string resultStr() { return _resultStr; }
+    int resultInt() { return _resultInt; }
+    bool called() { return _called; }
+
+    void
+    setArgs(int new_argc, char **new_argv)
+    {
+        _argc = new_argc;
+        _argv = new_argv;
+    }
+
+    void main() override;
+};
+
+extern ScMainFiber scMainFiber;
+
+} // namespace sc_gem5
+
+#endif // __SYSTEMC_CORE_SC_MAIN_FIBER_HH__