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authorAndreas Hansson <andreas.hansson@arm.com>2012-02-13 06:43:09 -0500
committerAndreas Hansson <andreas.hansson@arm.com>2012-02-13 06:43:09 -0500
commit5a9a743cfc4517f93e5c94533efa767b92272c59 (patch)
treef3dbc078a51e5759b26b1a5f16263ddb1cf55a7b /tests/configs/simple-timing-mp.py
parent8cb4a2208d568eb86ad3f6c6bb250bcbe2952302 (diff)
downloadgem5-5a9a743cfc4517f93e5c94533efa767b92272c59.tar.xz
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.
Diffstat (limited to 'tests/configs/simple-timing-mp.py')
-rw-r--r--tests/configs/simple-timing-mp.py8
1 files changed, 4 insertions, 4 deletions
diff --git a/tests/configs/simple-timing-mp.py b/tests/configs/simple-timing-mp.py
index 06d535154..5ec7a6067 100644
--- a/tests/configs/simple-timing-mp.py
+++ b/tests/configs/simple-timing-mp.py
@@ -61,10 +61,10 @@ Bus())
# l2cache & bus
system.toL2Bus = Bus()
system.l2c = L2(size='4MB', assoc=8)
-system.l2c.cpu_side = system.toL2Bus.port
+system.l2c.cpu_side = system.toL2Bus.master
# connect l2c to membus
-system.l2c.mem_side = system.membus.port
+system.l2c.mem_side = system.membus.slave
# add L1 caches
for cpu in cpus:
@@ -74,10 +74,10 @@ for cpu in cpus:
cpu.connectAllPorts(system.toL2Bus, system.membus)
cpu.clock = '2GHz'
-system.system_port = system.membus.port
+system.system_port = system.membus.slave
# connect memory to membus
-system.physmem.port = system.membus.port
+system.physmem.port = system.membus.master
# -----------------------