MeshDirCorners_XY.py revision 11663
110743Sandreas.hansson@arm.com# Copyright (c) 2010 Advanced Micro Devices, Inc. 210139Sandreas.hansson@arm.com# All rights reserved. 310139Sandreas.hansson@arm.com# 410139Sandreas.hansson@arm.com# Redistribution and use in source and binary forms, with or without 510139Sandreas.hansson@arm.com# modification, are permitted provided that the following conditions are 610139Sandreas.hansson@arm.com# met: redistributions of source code must retain the above copyright 710139Sandreas.hansson@arm.com# notice, this list of conditions and the following disclaimer; 810139Sandreas.hansson@arm.com# redistributions in binary form must reproduce the above copyright 910139Sandreas.hansson@arm.com# notice, this list of conditions and the following disclaimer in the 1010139Sandreas.hansson@arm.com# documentation and/or other materials provided with the distribution; 1110139Sandreas.hansson@arm.com# neither the name of the copyright holders nor the names of its 1210139Sandreas.hansson@arm.com# contributors may be used to endorse or promote products derived from 1310139Sandreas.hansson@arm.com# this software without specific prior written permission. 1410139Sandreas.hansson@arm.com# 1510139Sandreas.hansson@arm.com# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 1610139Sandreas.hansson@arm.com# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 1710139Sandreas.hansson@arm.com# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 1810139Sandreas.hansson@arm.com# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 1910139Sandreas.hansson@arm.com# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 2010139Sandreas.hansson@arm.com# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 2110139Sandreas.hansson@arm.com# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2210139Sandreas.hansson@arm.com# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2310139Sandreas.hansson@arm.com# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2410139Sandreas.hansson@arm.com# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 2510139Sandreas.hansson@arm.com# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2610139Sandreas.hansson@arm.com# 2710139Sandreas.hansson@arm.com# Authors: Brad Beckmann 2810139Sandreas.hansson@arm.com 2910139Sandreas.hansson@arm.comfrom m5.params import * 3010139Sandreas.hansson@arm.comfrom m5.objects import * 3110139Sandreas.hansson@arm.com 3210139Sandreas.hansson@arm.comfrom BaseTopology import SimpleTopology 3310139Sandreas.hansson@arm.com 3410139Sandreas.hansson@arm.com# Creates a Mesh topology with 4 directories, one at each corner. 3510139Sandreas.hansson@arm.com# One L1 (and L2, depending on the protocol) are connected to each router. 3610139Sandreas.hansson@arm.com# XY routing is enforced (using link weights) to guarantee deadlock freedom. 3710139Sandreas.hansson@arm.com 3810139Sandreas.hansson@arm.comclass MeshDirCorners_XY(SimpleTopology): 3910139Sandreas.hansson@arm.com description='MeshDirCorners_XY' 4010139Sandreas.hansson@arm.com 4110139Sandreas.hansson@arm.com def __init__(self, controllers): 4210139Sandreas.hansson@arm.com self.nodes = controllers 4310139Sandreas.hansson@arm.com 4410139Sandreas.hansson@arm.com def makeTopology(self, options, network, IntLink, ExtLink, Router): 4511682Sandreas.hansson@arm.com nodes = self.nodes 4610139Sandreas.hansson@arm.com 4711682Sandreas.hansson@arm.com num_routers = options.num_cpus 4810139Sandreas.hansson@arm.com num_rows = options.mesh_rows 4910139Sandreas.hansson@arm.com 5010139Sandreas.hansson@arm.com # First determine which nodes are cache cntrls vs. dirs vs. dma 5110139Sandreas.hansson@arm.com cache_nodes = [] 5210139Sandreas.hansson@arm.com dir_nodes = [] 5310139Sandreas.hansson@arm.com dma_nodes = [] 5410139Sandreas.hansson@arm.com for node in nodes: 5510139Sandreas.hansson@arm.com if node.type == 'L1Cache_Controller' or \ 5610139Sandreas.hansson@arm.com node.type == 'L2Cache_Controller': 5710789Sandreas.hansson@arm.com cache_nodes.append(node) 5810139Sandreas.hansson@arm.com elif node.type == 'Directory_Controller': 5910139Sandreas.hansson@arm.com dir_nodes.append(node) 6010139Sandreas.hansson@arm.com elif node.type == 'DMA_Controller': 6110743Sandreas.hansson@arm.com dma_nodes.append(node) 6210392Swendy.elsasser@arm.com 6310392Swendy.elsasser@arm.com # Obviously the number or rows must be <= the number of routers 6410392Swendy.elsasser@arm.com # and evenly divisible. Also the number of caches must be a 6510392Swendy.elsasser@arm.com # multiple of the number of routers and the number of directories 6610392Swendy.elsasser@arm.com # must be four. 6710392Swendy.elsasser@arm.com assert(num_rows <= num_routers) 6810392Swendy.elsasser@arm.com num_columns = int(num_routers / num_rows) 6910392Swendy.elsasser@arm.com assert(num_columns * num_rows == num_routers) 7010392Swendy.elsasser@arm.com caches_per_router, remainder = divmod(len(cache_nodes), num_routers) 7110392Swendy.elsasser@arm.com assert(remainder == 0) 7210392Swendy.elsasser@arm.com assert(len(dir_nodes) == 4) 7310392Swendy.elsasser@arm.com 7410392Swendy.elsasser@arm.com # Create the routers in the mesh 7510139Sandreas.hansson@arm.com routers = [Router(router_id=i) for i in range(num_routers)] 7610139Sandreas.hansson@arm.com network.routers = routers 7710139Sandreas.hansson@arm.com 7810139Sandreas.hansson@arm.com # link counter to set unique link ids 7910139Sandreas.hansson@arm.com link_count = 0 8010139Sandreas.hansson@arm.com 8110139Sandreas.hansson@arm.com # Connect each cache controller to the appropriate router 8210139Sandreas.hansson@arm.com ext_links = [] 8310139Sandreas.hansson@arm.com for (i, n) in enumerate(cache_nodes): 8411125Sandreas.hansson@arm.com cntrl_level, router_id = divmod(i, num_routers) 8511125Sandreas.hansson@arm.com assert(cntrl_level < caches_per_router) 8611125Sandreas.hansson@arm.com ext_links.append(ExtLink(link_id=link_count, ext_node=n, 8711125Sandreas.hansson@arm.com int_node=routers[router_id])) 8811125Sandreas.hansson@arm.com link_count += 1 8910139Sandreas.hansson@arm.com 9010139Sandreas.hansson@arm.com # Connect the dir nodes to the corners. 9110139Sandreas.hansson@arm.com ext_links.append(ExtLink(link_id=link_count, ext_node=dir_nodes[0], 9210139Sandreas.hansson@arm.com int_node=routers[0])) 9310139Sandreas.hansson@arm.com link_count += 1 9410139Sandreas.hansson@arm.com ext_links.append(ExtLink(link_id=link_count, ext_node=dir_nodes[1], 9510139Sandreas.hansson@arm.com int_node=routers[num_columns - 1])) 9610833Sandreas.hansson@arm.com link_count += 1 9711223Sandreas.hansson@arm.com ext_links.append(ExtLink(link_id=link_count, ext_node=dir_nodes[2], 9810833Sandreas.hansson@arm.com int_node=routers[num_routers - num_columns])) 9910139Sandreas.hansson@arm.com link_count += 1 10010139Sandreas.hansson@arm.com ext_links.append(ExtLink(link_id=link_count, ext_node=dir_nodes[3], 10110139Sandreas.hansson@arm.com int_node=routers[num_routers - 1])) 10210832Swendy.elsasser@arm.com link_count += 1 10311125Sandreas.hansson@arm.com 10411251Sradhika.jagtap@ARM.com # Connect the dma nodes to router 0. These should only be DMA nodes. 10510139Sandreas.hansson@arm.com for (i, node) in enumerate(dma_nodes): 10610139Sandreas.hansson@arm.com assert(node.type == 'DMA_Controller') 10710139Sandreas.hansson@arm.com ext_links.append(ExtLink(link_id=link_count, ext_node=node, 10810139Sandreas.hansson@arm.com int_node=routers[0])) 10910146Sandreas.hansson@arm.com 11010146Sandreas.hansson@arm.com network.ext_links = ext_links 11110139Sandreas.hansson@arm.com 11210833Sandreas.hansson@arm.com # Create the mesh links. 11310833Sandreas.hansson@arm.com int_links = [] 11410833Sandreas.hansson@arm.com 11510392Swendy.elsasser@arm.com # East output to West input links (weight = 1) 11610392Swendy.elsasser@arm.com for row in xrange(num_rows): 11710392Swendy.elsasser@arm.com for col in xrange(num_columns): 11810392Swendy.elsasser@arm.com if (col + 1 < num_columns): 11910392Swendy.elsasser@arm.com east_out = col + (row * num_columns) 12010392Swendy.elsasser@arm.com west_in = (col + 1) + (row * num_columns) 12110392Swendy.elsasser@arm.com int_links.append(IntLink(link_id=link_count, 12210392Swendy.elsasser@arm.com src_node=routers[east_out], 12310139Sandreas.hansson@arm.com dst_node=routers[west_in], 12410139Sandreas.hansson@arm.com weight=1)) 12510139Sandreas.hansson@arm.com link_count += 1 12610139Sandreas.hansson@arm.com 12710139Sandreas.hansson@arm.com # West output to East input links (weight = 1) 12810139Sandreas.hansson@arm.com for row in xrange(num_rows): 12910139Sandreas.hansson@arm.com for col in xrange(num_columns): 13010139Sandreas.hansson@arm.com if (col + 1 < num_columns): 13110139Sandreas.hansson@arm.com east_in = col + (row * num_columns) 13210139Sandreas.hansson@arm.com west_out = (col + 1) + (row * num_columns) 13310139Sandreas.hansson@arm.com int_links.append(IntLink(link_id=link_count, 13410139Sandreas.hansson@arm.com src_node=routers[west_out], 13510139Sandreas.hansson@arm.com dst_node=routers[east_in], 13610139Sandreas.hansson@arm.com weight=1)) 13710139Sandreas.hansson@arm.com link_count += 1 13810139Sandreas.hansson@arm.com 13910139Sandreas.hansson@arm.com # North output to South input links (weight = 2) 14010139Sandreas.hansson@arm.com for col in xrange(num_columns): 14110139Sandreas.hansson@arm.com for row in xrange(num_rows): 14210139Sandreas.hansson@arm.com if (row + 1 < num_rows): 14310139Sandreas.hansson@arm.com north_out = col + (row * num_columns) 14410139Sandreas.hansson@arm.com south_in = col + ((row + 1) * num_columns) 14510139Sandreas.hansson@arm.com int_links.append(IntLink(link_id=link_count, 14610139Sandreas.hansson@arm.com src_node=routers[north_out], 14710139Sandreas.hansson@arm.com dst_node=routers[south_in], 14810139Sandreas.hansson@arm.com weight=2)) 14911223Sandreas.hansson@arm.com link_count += 1 15011223Sandreas.hansson@arm.com 15110139Sandreas.hansson@arm.com # South output to North input links (weight = 2) 15210139Sandreas.hansson@arm.com for col in xrange(num_columns): 15310139Sandreas.hansson@arm.com for row in xrange(num_rows): 15410139Sandreas.hansson@arm.com if (row + 1 < num_rows): 15510139Sandreas.hansson@arm.com north_in = col + (row * num_columns) 15610323Sandreas.hansson@arm.com south_out = col + ((row + 1) * num_columns) 15710323Sandreas.hansson@arm.com int_links.append(IntLink(link_id=link_count, 15810323Sandreas.hansson@arm.com src_node=routers[south_out], 15910323Sandreas.hansson@arm.com dst_node=routers[north_in], 16010139Sandreas.hansson@arm.com weight=2)) 16110323Sandreas.hansson@arm.com link_count += 1 16210323Sandreas.hansson@arm.com 16310139Sandreas.hansson@arm.com 16410139Sandreas.hansson@arm.com network.int_links = int_links 16510323Sandreas.hansson@arm.com