From 5a9a743cfc4517f93e5c94533efa767b92272c59 Mon Sep 17 00:00:00 2001 From: Andreas Hansson Date: Mon, 13 Feb 2012 06:43:09 -0500 Subject: MEM: Introduce the master/slave port roles in the Python classes This patch classifies all ports in Python as either Master or Slave and enforces a binding of master to slave. Conceptually, a master (such as a CPU or DMA port) issues requests, and receives responses, and conversely, a slave (such as a memory or a PIO device) receives requests and sends back responses. Currently there is no differentiation between coherent and non-coherent masters and slaves. The classification as master/slave also involves splitting the dual role port of the bus into a master and slave port and updating all the system assembly scripts to use the appropriate port. Similarly, the interrupt devices have to have their int_port split into a master and slave port. The intdev and its children have minimal changes to facilitate the extra port. Note that this patch does not enforce any port typing in the C++ world, it merely ensures that the Python objects have a notion of the port roles and are connected in an appropriate manner. This check is carried when two ports are connected, e.g. bus.master = memory.port. The following patches will make use of the classifications and specialise the C++ ports into masters and slaves. --- tests/configs/o3-timing-mp-ruby.py | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'tests/configs/o3-timing-mp-ruby.py') diff --git a/tests/configs/o3-timing-mp-ruby.py b/tests/configs/o3-timing-mp-ruby.py index cff511bf8..3e5e34e71 100644 --- a/tests/configs/o3-timing-mp-ruby.py +++ b/tests/configs/o3-timing-mp-ruby.py @@ -44,10 +44,10 @@ for cpu in cpus: cpu.clock = '2GHz' # connect memory to membus -system.physmem.port = system.membus.port +system.physmem.port = system.membus.master # Connect the system port for loading of binaries etc -system.system_port = system.membus.port +system.system_port = system.membus.slave # ----------------------- # run simulation -- cgit v1.2.3