changeset 7565dcd505a4 in /z/repo/gem5
details: http://repo.gem5.org/gem5?cmd=changeset;node=7565dcd505a4
description:
config: Add port splicing capability to PortRef class
The new configuration scripts need the ability to splice
a simobject between a pair of ports that are already connected.
The primary use case is when a CommMonitor needs to be
created after the system is configured and then spliced between
the pair of ports it will monitor.
diffstat:
src/python/m5/params.py | 32 +++++++++++++++++++++++++++++++-
1 files changed, 31 insertions(+), 1 deletions(-)
diffs (46 lines):
diff -r 2d6d7a056a38 -r 7565dcd505a4 src/python/m5/params.py
--- a/src/python/m5/params.py Wed Sep 03 07:43:02 2014 -0400
+++ b/src/python/m5/params.py Wed Sep 03 07:43:03 2014 -0400
@@ -1,4 +1,4 @@
-# Copyright (c) 2012-2013 ARM Limited
+# Copyright (c) 2012-2014 ARM Limited
# All rights reserved.
#
# The license below extends only to copyright in the software and shall
@@ -1616,6 +1616,36 @@
"assigning non-port reference '%s' to port '%s'" \
% (other, self)
+ # Allow a master/slave port pair to be spliced between
+ # a port and its connected peer. Useful operation for connecting
+ # instrumentation structures into a system when it is necessary
+ # to connect the instrumentation after the full system has been
+ # constructed.
+ def splice(self, new_master_peer, new_slave_peer):
+ if self.peer and not proxy.isproxy(self.peer):
+ if isinstance(new_master_peer, PortRef) and \
+ isinstance(new_slave_peer, PortRef):
+ old_peer = self.peer
+ if self.role == 'SLAVE':
+ self.peer = new_master_peer
+ old_peer.peer = new_slave_peer
+ new_master_peer.connect(self)
+ new_slave_peer.connect(old_peer)
+ elif self.role == 'MASTER':
+ self.peer = new_slave_peer
+ old_peer.peer = new_master_peer
+ new_slave_peer.connect(self)
+ new_master_peer.connect(old_peer)
+ else:
+ panic("Port %s has unknown role, "+\
+ "cannot splice in new peers\n", self)
+ else:
+ raise TypeError, \
+ "Splicing non-port references '%s','%s' to port '%s'"\
+ % (new_peer, peers_new_peer, self)
+ else:
+ fatal("Port %s not connected, cannot splice in new peers\n", self)
+
def clone(self, simobj, memo):
if memo.has_key(self):
return memo[self]
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