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, 1 insertions, 1 deletions

diff --git a/src/arch/x86/tlb.cc b/src/arch/x86/tlb.cc
index df7a33ad2..fb7dac02e 100644
--- a/src/arch/x86/tlb.cc
+++ b/src/arch/x86/tlb.cc
@@ -435,7 +435,7 @@ TLB::unserialize(Checkpoint *cp, const std::string &section)
 {
 }
 
-MasterPort *
+BaseMasterPort *
 TLB::getMasterPort()
 {
     return &walker->getMasterPort("port");