Port: Add protocol-agnostic ports in the port hierarchy

This patch adds an additional level of ports in the inheritance
hierarchy, separating out the protocol-specific and protocl-agnostic
parts. All the functionality related to the binding of ports is now
confined to use BaseMaster/BaseSlavePorts, and all the
protocol-specific parts stay in the Master/SlavePort. In the future it
will be possible to add other protocol-specific implementations.

The functions used in the binding of ports, i.e. getMaster/SlavePort
now use the base classes, and the index parameter is updated to use
the PortID typedef with the symbolic InvalidPortID as the default.

1 files changed, 4 insertions, 4 deletions

diff --git a/src/mem/mem_object.cc b/src/mem/mem_object.cc
index cc05b7fc2..766eceeb7 100644
--- a/src/mem/mem_object.cc
+++ b/src/mem/mem_object.cc
@@ -48,14 +48,14 @@ MemObject::MemObject(const Params *params)
 {
 }
 
-MasterPort&
-MemObject::getMasterPort(const std::string& if_name, int idx)
+BaseMasterPort&
+MemObject::getMasterPort(const std::string& if_name, PortID idx)
 {
     fatal("%s does not have any master port named %s\n", name(), if_name);
 }
 
-SlavePort&
-MemObject::getSlavePort(const std::string& if_name, int idx)
+BaseSlavePort&
+MemObject::getSlavePort(const std::string& if_name, PortID idx)
 {
     fatal("%s does not have any slave port named %s\n", name(), if_name);
 }