2 files changed, 14 insertions, 0 deletions
diff --git a/src/sim/full_system.hh b/src/sim/full_system.hh
index e67fc11a9..18cf34d09 100644
--- a/src/sim/full_system.hh
+++ b/src/sim/full_system.hh
@@ -31,6 +31,18 @@
 #ifndef __SIM_FULL_SYSTEM_HH__
 #define __SIM_FULL_SYSTEM_HH__
 
+/**
+ * The FullSystem variable can be used to determine the current mode
+ * of simulation.
+ */
 extern bool FullSystem;
 
+/**
+ * In addition to the boolean flag we make use of an unsigned int
+ * since the CPU instruction decoder makes use of the variable in
+ * switch statements. A value of 0 signifies syscall emulation, and
+ * any other value full system.
+ */
+extern unsigned int FullSystemInt;
+
 #endif // __SIM_FULL_SYSTEM_HH__
diff --git a/src/sim/root.cc b/src/sim/root.cc
index c47ada30e..2d28499a7 100644
--- a/src/sim/root.cc
+++ b/src/sim/root.cc
@@ -125,6 +125,7 @@ Root::loadState(Checkpoint *cp)
 }
 
 bool FullSystem;
+unsigned int FullSystemInt;
 
 Root *
 RootParams::create()
@@ -136,6 +137,7 @@ RootParams::create()
     created = true;
 
     FullSystem = full_system;
+    FullSystemInt = full_system ? 1 : 0;
 
     return new Root(this);
 }