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, 3 insertions, 3 deletions

diff --git a/src/dev/copy_engine.cc b/src/dev/copy_engine.cc
index 77cc735a9..799e9f96a 100644
--- a/src/dev/copy_engine.cc
+++ b/src/dev/copy_engine.cc
@@ -110,8 +110,8 @@ CopyEngine::CopyEngineChannel::~CopyEngineChannel()
     delete [] copyBuffer;
 }
 
-MasterPort &
-CopyEngine::getMasterPort(const std::string &if_name, int idx)
+BaseMasterPort &
+CopyEngine::getMasterPort(const std::string &if_name, PortID idx)
 {
     if (if_name != "dma") {
         // pass it along to our super class
@@ -126,7 +126,7 @@ CopyEngine::getMasterPort(const std::string &if_name, int idx)
 }
 
 
-MasterPort &
+BaseMasterPort &
 CopyEngine::CopyEngineChannel::getMasterPort()
 {
     return cePort;