sim: Add a takeOverFrom method to the base Port class.
This makes it easier, safer, and less verbose to swap out ports when
a CPU takes over for another CPU, for instance.
Change-Id: Ice08e4dcb4b04dc66b1841331092a78b4f6f5a96
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/20233
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Gabe Black <gabeblack@google.com>
diff --git a/src/sim/port.hh b/src/sim/port.hh
index ee4b548..1114172 100644
--- a/src/sim/port.hh
+++ b/src/sim/port.hh
@@ -126,6 +126,25 @@
/** Is this port currently connected to a peer? */
bool isConnected() const { return _connected; }
+
+ /** A utility function to make it easier to swap out ports. */
+ void
+ takeOverFrom(Port *old)
+ {
+ assert(old);
+ assert(old->isConnected());
+ assert(!isConnected());
+ Port &peer = old->getPeer();
+ assert(peer.isConnected());
+
+ // Disconnect the original binding.
+ old->unbind();
+ peer.unbind();
+
+ // Connect the new binding.
+ peer.bind(*this);
+ bind(peer);
+ }
};
#endif //__SIM_PORT_HH__
