XBar.py revision 5354
112855Sgabeblack@google.com# Copyright (c) 2005-2008 The Regents of The University of Michigan 212855Sgabeblack@google.com# All rights reserved. 312855Sgabeblack@google.com# 412855Sgabeblack@google.com# Redistribution and use in source and binary forms, with or without 512855Sgabeblack@google.com# modification, are permitted provided that the following conditions are 612855Sgabeblack@google.com# met: redistributions of source code must retain the above copyright 712855Sgabeblack@google.com# notice, this list of conditions and the following disclaimer; 812855Sgabeblack@google.com# redistributions in binary form must reproduce the above copyright 912855Sgabeblack@google.com# notice, this list of conditions and the following disclaimer in the 1012855Sgabeblack@google.com# documentation and/or other materials provided with the distribution; 1112855Sgabeblack@google.com# neither the name of the copyright holders nor the names of its 1212855Sgabeblack@google.com# contributors may be used to endorse or promote products derived from 1312855Sgabeblack@google.com# this software without specific prior written permission. 1412855Sgabeblack@google.com# 1512855Sgabeblack@google.com# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 1612855Sgabeblack@google.com# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 1712855Sgabeblack@google.com# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 1812855Sgabeblack@google.com# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 1912855Sgabeblack@google.com# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 2012855Sgabeblack@google.com# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 2112855Sgabeblack@google.com# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2212855Sgabeblack@google.com# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2312855Sgabeblack@google.com# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2412855Sgabeblack@google.com# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 2512855Sgabeblack@google.com# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2612855Sgabeblack@google.com# 2712855Sgabeblack@google.com# Authors: Nathan Binkert 2812855Sgabeblack@google.com 2912855Sgabeblack@google.comfrom m5 import build_env 3012855Sgabeblack@google.comfrom m5.params import * 3112855Sgabeblack@google.comfrom m5.proxy import * 3212855Sgabeblack@google.comfrom MemObject import MemObject 3312855Sgabeblack@google.com 3412855Sgabeblack@google.comif build_env['FULL_SYSTEM']: 3512855Sgabeblack@google.com from Device import BadAddr 3612855Sgabeblack@google.com 3712855Sgabeblack@google.comclass Bus(MemObject): 3812855Sgabeblack@google.com type = 'Bus' 3912855Sgabeblack@google.com port = VectorPort("vector port for connecting devices") 4012855Sgabeblack@google.com bus_id = Param.Int(0, "blah") 4112855Sgabeblack@google.com clock = Param.Clock("1GHz", "bus clock speed") 4212855Sgabeblack@google.com header_cycles = Param.Int(1, "cycles of overhead per transaction") 4312855Sgabeblack@google.com width = Param.Int(64, "bus width (bytes)") 4412855Sgabeblack@google.com responder_set = Param.Bool(False, "Did the user specify a default responder.") 4512855Sgabeblack@google.com block_size = Param.Int(64, "The default block size if one isn't set by a device attached to the bus.") 4612855Sgabeblack@google.com if build_env['FULL_SYSTEM']: 4712855Sgabeblack@google.com responder = BadAddr(pio_addr=0x0, pio_latency="1ps") 4812855Sgabeblack@google.com default = Port(Self.responder.pio, "Default port for requests that aren't handled by a device.") 4912855Sgabeblack@google.com else: 5012855Sgabeblack@google.com default = Port("Default port for requests that aren't handled by a device.") 5112855Sgabeblack@google.com