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, 2 insertions, 2 deletions

diff --git a/src/arch/arm/table_walker.cc b/src/arch/arm/table_walker.cc
index dbd4211d5..5f4453935 100644
--- a/src/arch/arm/table_walker.cc
+++ b/src/arch/arm/table_walker.cc
@@ -110,8 +110,8 @@ TableWalker::resume()
     }
 }
 
-MasterPort&
-TableWalker::getMasterPort(const std::string &if_name, int idx)
+BaseMasterPort&
+TableWalker::getMasterPort(const std::string &if_name, PortID idx)
 {
     if (if_name == "port") {
         return port;