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authorAndreas Hansson <andreas.hansson@arm.com>2012-02-13 06:45:11 -0500
committerAndreas Hansson <andreas.hansson@arm.com>2012-02-13 06:45:11 -0500
commit63777fb23f043012ba052fc9c5968da7bdd59221 (patch)
treefb4e31c4acfa6218a08f0fa627db390f6f22b1be /src/python/m5
parent5a9a743cfc4517f93e5c94533efa767b92272c59 (diff)
downloadgem5-63777fb23f043012ba052fc9c5968da7bdd59221.tar.xz
MEM: Pass the ports from Python to C++ using the Swig params
This patch adds basic information about the ports in the parameter classes to be passed from the Python world to the corresponding C++ object. Currently, the only information passed is the number of connected peers, which for a Port is either 0 or 1, and for a VectorPort reflects the size of the VectorPort. The default port of the bus had to be renamed to avoid using the name "default" as a field in the parameter class. It is possible to extend the Swig'ed information further and add e.g. a pair with a description and size.
Diffstat (limited to 'src/python/m5')
-rw-r--r--src/python/m5/SimObject.py23
-rw-r--r--src/python/m5/params.py21
2 files changed, 43 insertions, 1 deletions
diff --git a/src/python/m5/SimObject.py b/src/python/m5/SimObject.py
index afdd84fe3..78138b083 100644
--- a/src/python/m5/SimObject.py
+++ b/src/python/m5/SimObject.py
@@ -1,3 +1,15 @@
+# Copyright (c) 2012 ARM Limited
+# All rights reserved.
+#
+# The license below extends only to copyright in the software and shall
+# not be construed as granting a license to any other intellectual
+# property including but not limited to intellectual property relating
+# to a hardware implementation of the functionality of the software
+# licensed hereunder. You may use the software subject to the license
+# terms below provided that you ensure that this notice is replicated
+# unmodified and in its entirety in all distributions of the software,
+# modified or unmodified, in source code or in binary form.
+#
# Copyright (c) 2004-2006 The Regents of The University of Michigan
# Copyright (c) 2010 Advanced Micro Devices, Inc.
# All rights reserved.
@@ -27,6 +39,7 @@
#
# Authors: Steve Reinhardt
# Nathan Binkert
+# Andreas Hansson
import sys
from types import FunctionType, MethodType, ModuleType
@@ -386,6 +399,7 @@ class MetaSimObject(type):
# will also be inherited from the base class's param struct
# here).
params = cls._params.local.values()
+ ports = cls._ports.local
code('%module(package="m5.internal") param_$cls')
code()
@@ -441,6 +455,7 @@ class MetaSimObject(type):
# will also be inherited from the base class's param struct
# here).
params = cls._params.local.values()
+ ports = cls._ports.local
try:
ptypes = [p.ptype for p in params]
except:
@@ -481,6 +496,8 @@ class EventQueue;
''')
for param in params:
param.cxx_predecls(code)
+ for port in ports.itervalues():
+ port.cxx_predecls(code)
code()
if cls._base:
@@ -517,6 +534,9 @@ class EventQueue;
''')
for param in params:
param.cxx_decl(code)
+ for port in ports.itervalues():
+ port.cxx_decl(code)
+
code.dedent()
code('};')
@@ -960,7 +980,8 @@ class SimObject(object):
for port_name in port_names:
port = self._port_refs.get(port_name, None)
if port != None:
- setattr(cc_params, port_name, port)
+ setattr(cc_params, 'port_' + port_name + '_connection_count',
+ len(port))
self._ccParams = cc_params
return self._ccParams
diff --git a/src/python/m5/params.py b/src/python/m5/params.py
index 95958e3e6..0a369e641 100644
--- a/src/python/m5/params.py
+++ b/src/python/m5/params.py
@@ -1349,6 +1349,11 @@ class PortRef(object):
def __str__(self):
return '%s.%s' % (self.simobj, self.name)
+ def __len__(self):
+ # Return the number of connected ports, i.e. 0 is we have no
+ # peer and 1 if we do.
+ return int(self.peer != None)
+
# for config.ini, print peer's name (not ours)
def ini_str(self):
return str(self.peer)
@@ -1462,6 +1467,11 @@ class VectorPortRef(object):
def __str__(self):
return '%s.%s[:]' % (self.simobj, self.name)
+ def __len__(self):
+ # Return the number of connected peers, corresponding the the
+ # length of the elements.
+ return len(self.elements)
+
# for config.ini, print peer's name (not ours)
def ini_str(self):
return ' '.join([el.ini_str() for el in self.elements])
@@ -1525,6 +1535,17 @@ class Port(object):
def connect(self, simobj, ref):
self.makeRef(simobj).connect(ref)
+ # No need for any pre-declarations at the moment as we merely rely
+ # on an unsigned int.
+ def cxx_predecls(self, code):
+ pass
+
+ # Declare an unsigned int with the same name as the port, that
+ # will eventually hold the number of connected ports (and thus the
+ # number of elements for a VectorPort).
+ def cxx_decl(self, code):
+ code('unsigned int port_${{self.name}}_connection_count;')
+
class MasterPort(Port):
# MasterPort("description")
def __init__(self, *args):