config: Add a system clock command-line option

This patch adds a 'sys_clock' command-line option and use it to assign
clocks to the system during instantiation.

As part of this change, the default clock in the System class is
removed and whenever a system is instantiated a system clock value
must be set. A default value is provided for the command-line option.

The configs and tests are updated accordingly.

1 files changed, 0 insertions, 6 deletions

diff --git a/src/sim/System.py b/src/sim/System.py
index 031331375..2cc171881 100644
--- a/src/sim/System.py
+++ b/src/sim/System.py
@@ -43,12 +43,6 @@ class System(MemObject):
     cxx_header = "sim/system.hh"
     system_port = MasterPort("System port")
 
-    # Override the clock from the ClockedObject which looks at the
-    # parent clock by default. The 1 GHz default system clock serves
-    # as a start for the modules that rely on the parent to provide
-    # the clock.
-    clock = '1GHz'
-
     @classmethod
     def export_method_cxx_predecls(cls, code):
         code('#include "sim/system.hh"')