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. --- src/cpu/testers/rubytest/RubyTester.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'src/cpu/testers/rubytest') diff --git a/src/cpu/testers/rubytest/RubyTester.py b/src/cpu/testers/rubytest/RubyTester.py index fc0a60e11..6518862e9 100644 --- a/src/cpu/testers/rubytest/RubyTester.py +++ b/src/cpu/testers/rubytest/RubyTester.py @@ -32,7 +32,7 @@ from m5.proxy import * class RubyTester(MemObject): type = 'RubyTester' - cpuPort = VectorPort("the cpu ports") + cpuPort = VectorMasterPort("the cpu ports") checks_to_complete = Param.Int(100, "checks to complete") deadlock_threshold = Param.Int(50000, "how often to check for deadlock") wakeup_frequency = Param.Int(10, "number of cycles between wakeups") -- cgit v1.2.3