config: make internal links in network topology unidirectional.

This patch makes the internal links within the network topology
unidirectional, thus allowing any deadlock-free routing algorithms to
be specified from the topology itself using weights.
This patch also renames Mesh.py and MeshDirCorners.py to
Mesh_XY.py and MeshDirCorners_XY.py (Mesh with XY routing).
It also adds a Mesh_westfirst.py and CrossbarGarnet.py topologies.

2 files changed, 10 insertions, 16 deletions

diff --git a/src/mem/ruby/network/garnet/fixed-pipeline/GarnetNetwork_d.cc b/src/mem/ruby/network/garnet/fixed-pipeline/GarnetNetwork_d.cc
index ce919335e..1e36a4cf0 100644
--- a/src/mem/ruby/network/garnet/fixed-pipeline/GarnetNetwork_d.cc
+++ b/src/mem/ruby/network/garnet/fixed-pipeline/GarnetNetwork_d.cc
@@ -127,15 +127,14 @@ GarnetNetwork_d::~GarnetNetwork_d()
 */
 
 void
-GarnetNetwork_d::makeInLink(NodeID src, SwitchID dest, BasicLink* link,
-                            LinkDirection direction,
+GarnetNetwork_d::makeExtInLink(NodeID src, SwitchID dest, BasicLink* link,
                             const NetDest& routing_table_entry)
 {
     assert(src < m_nodes);
 
     GarnetExtLink_d* garnet_link = safe_cast<GarnetExtLink_d*>(link);
-    NetworkLink_d* net_link = garnet_link->m_network_links[direction];
-    CreditLink_d* credit_link = garnet_link->m_credit_links[direction];
+    NetworkLink_d* net_link = garnet_link->m_network_links[0];
+    CreditLink_d* credit_link = garnet_link->m_credit_links[0];
 
     m_links.push_back(net_link);
     m_creditlinks.push_back(credit_link);
@@ -151,8 +150,7 @@ GarnetNetwork_d::makeInLink(NodeID src, SwitchID dest, BasicLink* link,
 */
 
 void
-GarnetNetwork_d::makeOutLink(SwitchID src, NodeID dest, BasicLink* link,
-                             LinkDirection direction,
+GarnetNetwork_d::makeExtOutLink(SwitchID src, NodeID dest, BasicLink* link,
                              const NetDest& routing_table_entry)
 {
     assert(dest < m_nodes);
@@ -160,8 +158,8 @@ GarnetNetwork_d::makeOutLink(SwitchID src, NodeID dest, BasicLink* link,
     assert(m_routers[src] != NULL);
 
     GarnetExtLink_d* garnet_link = safe_cast<GarnetExtLink_d*>(link);
-    NetworkLink_d* net_link = garnet_link->m_network_links[direction];
-    CreditLink_d* credit_link = garnet_link->m_credit_links[direction];
+    NetworkLink_d* net_link = garnet_link->m_network_links[1];
+    CreditLink_d* credit_link = garnet_link->m_credit_links[1];
 
     m_links.push_back(net_link);
     m_creditlinks.push_back(credit_link);
@@ -177,12 +175,11 @@ GarnetNetwork_d::makeOutLink(SwitchID src, NodeID dest, BasicLink* link,
 
 void
 GarnetNetwork_d::makeInternalLink(SwitchID src, SwitchID dest, BasicLink* link,
-                                  LinkDirection direction,
                                   const NetDest& routing_table_entry)
 {
     GarnetIntLink_d* garnet_link = safe_cast<GarnetIntLink_d*>(link);
-    NetworkLink_d* net_link = garnet_link->m_network_links[direction];
-    CreditLink_d* credit_link = garnet_link->m_credit_links[direction];
+    NetworkLink_d* net_link = garnet_link->m_network_links[0];
+    CreditLink_d* credit_link = garnet_link->m_credit_links[0];
 
     m_links.push_back(net_link);
     m_creditlinks.push_back(credit_link);
diff --git a/src/mem/ruby/network/garnet/fixed-pipeline/GarnetNetwork_d.hh b/src/mem/ruby/network/garnet/fixed-pipeline/GarnetNetwork_d.hh
index 99ecc02da..a11f3ea50 100644
--- a/src/mem/ruby/network/garnet/fixed-pipeline/GarnetNetwork_d.hh
+++ b/src/mem/ruby/network/garnet/fixed-pipeline/GarnetNetwork_d.hh
@@ -69,14 +69,11 @@ class GarnetNetwork_d : public BaseGarnetNetwork
     }
 
     // Methods used by Topology to setup the network
-    void makeOutLink(SwitchID src, NodeID dest, BasicLink* link,
-                     LinkDirection direction,
+    void makeExtOutLink(SwitchID src, NodeID dest, BasicLink* link,
                      const NetDest& routing_table_entry);
-    void makeInLink(NodeID src, SwitchID dest, BasicLink* link,
-                    LinkDirection direction,
+    void makeExtInLink(NodeID src, SwitchID dest, BasicLink* link,
                     const NetDest& routing_table_entry);
     void makeInternalLink(SwitchID src, SwitchID dest, BasicLink* link,
-                          LinkDirection direction,
                           const NetDest& routing_table_entry);
 
     //! Function for performing a functional write. The return value