111663Stushar@ece.gatech.edu# Copyright (c) 2010 Advanced Micro Devices, Inc. 211663Stushar@ece.gatech.edu# 2016 Georgia Institute of Technology 311663Stushar@ece.gatech.edu# All rights reserved. 411663Stushar@ece.gatech.edu# 511663Stushar@ece.gatech.edu# Redistribution and use in source and binary forms, with or without 611663Stushar@ece.gatech.edu# modification, are permitted provided that the following conditions are 711663Stushar@ece.gatech.edu# met: redistributions of source code must retain the above copyright 811663Stushar@ece.gatech.edu# notice, this list of conditions and the following disclaimer; 911663Stushar@ece.gatech.edu# redistributions in binary form must reproduce the above copyright 1011663Stushar@ece.gatech.edu# notice, this list of conditions and the following disclaimer in the 1111663Stushar@ece.gatech.edu# documentation and/or other materials provided with the distribution; 1211663Stushar@ece.gatech.edu# neither the name of the copyright holders nor the names of its 1311663Stushar@ece.gatech.edu# contributors may be used to endorse or promote products derived from 1411663Stushar@ece.gatech.edu# this software without specific prior written permission. 1511663Stushar@ece.gatech.edu# 1611663Stushar@ece.gatech.edu# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 1711663Stushar@ece.gatech.edu# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 1811663Stushar@ece.gatech.edu# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 1911663Stushar@ece.gatech.edu# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 2011663Stushar@ece.gatech.edu# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 2111663Stushar@ece.gatech.edu# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 2211663Stushar@ece.gatech.edu# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2311663Stushar@ece.gatech.edu# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2411663Stushar@ece.gatech.edu# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2511663Stushar@ece.gatech.edu# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 2611663Stushar@ece.gatech.edu# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2711663Stushar@ece.gatech.edu# 2811663Stushar@ece.gatech.edu# Authors: Brad Beckmann 2911663Stushar@ece.gatech.edu# Tushar Krishna 3013774Sandreas.sandberg@arm.comfrom __future__ import print_function 3113774Sandreas.sandberg@arm.comfrom __future__ import absolute_import 3211663Stushar@ece.gatech.edu 3311663Stushar@ece.gatech.edufrom m5.params import * 3411663Stushar@ece.gatech.edufrom m5.objects import * 3511663Stushar@ece.gatech.edu 3613774Sandreas.sandberg@arm.comfrom .BaseTopology import SimpleTopology 3711663Stushar@ece.gatech.edu 3811663Stushar@ece.gatech.edu# Creates a generic Mesh assuming an equal number of cache 3911663Stushar@ece.gatech.edu# and directory controllers. 4011663Stushar@ece.gatech.edu# West-first routing is enforced (using link weights) 4111663Stushar@ece.gatech.edu# to guarantee deadlock freedom. 4211663Stushar@ece.gatech.edu# The network randomly chooses between links with the same 4311663Stushar@ece.gatech.edu# weight for messages within unordered virtual networks. 4411663Stushar@ece.gatech.edu# Within ordered virtual networks, a fixed link direction 4511663Stushar@ece.gatech.edu# is always chosen based on which appears first inside the 4611663Stushar@ece.gatech.edu# routing table. 4711663Stushar@ece.gatech.edu 4811663Stushar@ece.gatech.educlass Mesh_westfirst(SimpleTopology): 4911663Stushar@ece.gatech.edu description='Mesh_westfirst' 5011663Stushar@ece.gatech.edu 5111663Stushar@ece.gatech.edu def __init__(self, controllers): 5211663Stushar@ece.gatech.edu self.nodes = controllers 5311663Stushar@ece.gatech.edu 5411663Stushar@ece.gatech.edu # Makes a generic mesh 5511663Stushar@ece.gatech.edu # assuming an equal number of cache and directory cntrls 5611663Stushar@ece.gatech.edu 5711663Stushar@ece.gatech.edu def makeTopology(self, options, network, IntLink, ExtLink, Router): 5811663Stushar@ece.gatech.edu nodes = self.nodes 5911663Stushar@ece.gatech.edu 6011663Stushar@ece.gatech.edu num_routers = options.num_cpus 6111663Stushar@ece.gatech.edu num_rows = options.mesh_rows 6211663Stushar@ece.gatech.edu 6311666Stushar@ece.gatech.edu # default values for link latency and router latency. 6411666Stushar@ece.gatech.edu # Can be over-ridden on a per link/router basis 6511666Stushar@ece.gatech.edu link_latency = options.link_latency # used by simple and garnet 6611666Stushar@ece.gatech.edu router_latency = options.router_latency # only used by garnet 6711666Stushar@ece.gatech.edu 6811663Stushar@ece.gatech.edu # There must be an evenly divisible number of cntrls to routers 6911663Stushar@ece.gatech.edu # Also, obviously the number or rows must be <= the number of routers 7011663Stushar@ece.gatech.edu cntrls_per_router, remainder = divmod(len(nodes), num_routers) 7111666Stushar@ece.gatech.edu assert(num_rows > 0 and num_rows <= num_routers) 7211663Stushar@ece.gatech.edu num_columns = int(num_routers / num_rows) 7311663Stushar@ece.gatech.edu assert(num_columns * num_rows == num_routers) 7411663Stushar@ece.gatech.edu 7511663Stushar@ece.gatech.edu # Create the routers in the mesh 7611666Stushar@ece.gatech.edu routers = [Router(router_id=i, latency=router_latency) \ 7711666Stushar@ece.gatech.edu for i in range(num_routers)] 7811663Stushar@ece.gatech.edu network.routers = routers 7911663Stushar@ece.gatech.edu 8011663Stushar@ece.gatech.edu # link counter to set unique link ids 8111663Stushar@ece.gatech.edu link_count = 0 8211663Stushar@ece.gatech.edu 8311663Stushar@ece.gatech.edu # Add all but the remainder nodes to the list of nodes to be uniformly 8411663Stushar@ece.gatech.edu # distributed across the network. 8511663Stushar@ece.gatech.edu network_nodes = [] 8611663Stushar@ece.gatech.edu remainder_nodes = [] 8713731Sandreas.sandberg@arm.com for node_index in range(len(nodes)): 8811663Stushar@ece.gatech.edu if node_index < (len(nodes) - remainder): 8911663Stushar@ece.gatech.edu network_nodes.append(nodes[node_index]) 9011663Stushar@ece.gatech.edu else: 9111663Stushar@ece.gatech.edu remainder_nodes.append(nodes[node_index]) 9211663Stushar@ece.gatech.edu 9311663Stushar@ece.gatech.edu # Connect each node to the appropriate router 9411663Stushar@ece.gatech.edu ext_links = [] 9511663Stushar@ece.gatech.edu for (i, n) in enumerate(network_nodes): 9611663Stushar@ece.gatech.edu cntrl_level, router_id = divmod(i, num_routers) 9711663Stushar@ece.gatech.edu assert(cntrl_level < cntrls_per_router) 9811663Stushar@ece.gatech.edu ext_links.append(ExtLink(link_id=link_count, ext_node=n, 9911666Stushar@ece.gatech.edu int_node=routers[router_id], 10011666Stushar@ece.gatech.edu latency = link_latency)) 10111663Stushar@ece.gatech.edu link_count += 1 10211663Stushar@ece.gatech.edu 10311663Stushar@ece.gatech.edu # Connect the remainding nodes to router 0. These should only be 10411663Stushar@ece.gatech.edu # DMA nodes. 10511663Stushar@ece.gatech.edu for (i, node) in enumerate(remainder_nodes): 10611663Stushar@ece.gatech.edu assert(node.type == 'DMA_Controller') 10711663Stushar@ece.gatech.edu assert(i < remainder) 10811663Stushar@ece.gatech.edu ext_links.append(ExtLink(link_id=link_count, ext_node=node, 10911666Stushar@ece.gatech.edu int_node=routers[0], 11011666Stushar@ece.gatech.edu latency = link_latency)) 11111663Stushar@ece.gatech.edu link_count += 1 11211663Stushar@ece.gatech.edu 11311663Stushar@ece.gatech.edu network.ext_links = ext_links 11411663Stushar@ece.gatech.edu 11511663Stushar@ece.gatech.edu # Create the mesh links. 11611663Stushar@ece.gatech.edu int_links = [] 11711663Stushar@ece.gatech.edu 11811663Stushar@ece.gatech.edu # East output to West input links (weight = 2) 11913731Sandreas.sandberg@arm.com for row in range(num_rows): 12013731Sandreas.sandberg@arm.com for col in range(num_columns): 12111663Stushar@ece.gatech.edu if (col + 1 < num_columns): 12211663Stushar@ece.gatech.edu east_out = col + (row * num_columns) 12311663Stushar@ece.gatech.edu west_in = (col + 1) + (row * num_columns) 12411663Stushar@ece.gatech.edu int_links.append(IntLink(link_id=link_count, 12511663Stushar@ece.gatech.edu src_node=routers[east_out], 12611663Stushar@ece.gatech.edu dst_node=routers[west_in], 12711666Stushar@ece.gatech.edu latency = link_latency, 12811663Stushar@ece.gatech.edu weight=2)) 12911663Stushar@ece.gatech.edu link_count += 1 13011663Stushar@ece.gatech.edu 13111663Stushar@ece.gatech.edu # West output to East input links (weight = 1) 13213731Sandreas.sandberg@arm.com for row in range(num_rows): 13313731Sandreas.sandberg@arm.com for col in range(num_columns): 13411663Stushar@ece.gatech.edu if (col + 1 < num_columns): 13511663Stushar@ece.gatech.edu east_in = col + (row * num_columns) 13611663Stushar@ece.gatech.edu west_out = (col + 1) + (row * num_columns) 13711663Stushar@ece.gatech.edu int_links.append(IntLink(link_id=link_count, 13811663Stushar@ece.gatech.edu src_node=routers[west_out], 13911663Stushar@ece.gatech.edu dst_node=routers[east_in], 14011666Stushar@ece.gatech.edu latency = link_latency, 14111663Stushar@ece.gatech.edu weight=1)) 14211663Stushar@ece.gatech.edu link_count += 1 14311663Stushar@ece.gatech.edu 14411663Stushar@ece.gatech.edu 14511663Stushar@ece.gatech.edu # North output to South input links (weight = 2) 14613731Sandreas.sandberg@arm.com for col in range(num_columns): 14713731Sandreas.sandberg@arm.com for row in range(num_rows): 14811663Stushar@ece.gatech.edu if (row + 1 < num_rows): 14911663Stushar@ece.gatech.edu north_out = col + (row * num_columns) 15011663Stushar@ece.gatech.edu south_in = col + ((row + 1) * num_columns) 15111663Stushar@ece.gatech.edu int_links.append(IntLink(link_id=link_count, 15211663Stushar@ece.gatech.edu src_node=routers[north_out], 15311663Stushar@ece.gatech.edu dst_node=routers[south_in], 15411666Stushar@ece.gatech.edu latency = link_latency, 15511663Stushar@ece.gatech.edu weight=2)) 15611663Stushar@ece.gatech.edu link_count += 1 15711663Stushar@ece.gatech.edu 15811663Stushar@ece.gatech.edu # South output to North input links (weight = 2) 15913731Sandreas.sandberg@arm.com for col in range(num_columns): 16013731Sandreas.sandberg@arm.com for row in range(num_rows): 16111663Stushar@ece.gatech.edu if (row + 1 < num_rows): 16211663Stushar@ece.gatech.edu north_in = col + (row * num_columns) 16311663Stushar@ece.gatech.edu south_out = col + ((row + 1) * num_columns) 16411663Stushar@ece.gatech.edu int_links.append(IntLink(link_id=link_count, 16511663Stushar@ece.gatech.edu src_node=routers[south_out], 16611663Stushar@ece.gatech.edu dst_node=routers[north_in], 16711666Stushar@ece.gatech.edu latency = link_latency, 16811663Stushar@ece.gatech.edu weight=2)) 16911663Stushar@ece.gatech.edu link_count += 1 17011663Stushar@ece.gatech.edu 17111663Stushar@ece.gatech.edu 17211663Stushar@ece.gatech.edu network.int_links = int_links 173