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Diffstat (limited to 'configs/topologies/MeshDirCorners.py')
| -rw-r--r-- | configs/topologies/MeshDirCorners.py | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/configs/topologies/MeshDirCorners.py b/configs/topologies/MeshDirCorners.py new file mode 100644 index 000000000..23bcde5a6 --- /dev/null +++ b/configs/topologies/MeshDirCorners.py @@ -0,0 +1,134 @@ +# Copyright (c) 2010 Advanced Micro Devices, Inc. +# All rights reserved. +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions are +# met: redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer; +# redistributions in binary form must reproduce the above copyright +# notice, this list of conditions and the following disclaimer in the +# documentation and/or other materials provided with the distribution; +# neither the name of the copyright holders nor the names of its +# contributors may be used to endorse or promote products derived from +# this software without specific prior written permission. +# +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +# +# Authors: Brad Beckmann + +from m5.params import * +from m5.objects import * + +from BaseTopology import BaseTopology + +class MeshDirCorners(BaseTopology): + description='MeshDirCorners' + + def __init__(self, controllers): + self.nodes = controllers + + # This file contains a special network creation function. This + # networks is not general and will only work with specific system + # configurations. The network specified is similar to GEMS old file + # specified network. + + def makeTopology(self, options, IntLink, ExtLink, Router): + nodes = self.nodes + + num_routers = options.num_cpus + num_rows = options.mesh_rows + + # First determine which nodes are cache cntrls vs. dirs vs. dma + cache_nodes = [] + dir_nodes = [] + dma_nodes = [] + for node in nodes: + if node.type == 'L1Cache_Controller' or \ + node.type == 'L2Cache_Controller': + cache_nodes.append(node) + elif node.type == 'Directory_Controller': + dir_nodes.append(node) + elif node.type == 'DMA_Controller': + dma_nodes.append(node) + + # Obviously the number or rows must be <= the number of routers + # and evenly divisible. Also the number of caches must be a + # multiple of the number of routers and the number of directories + # must be four. + assert(num_rows <= num_routers) + num_columns = int(num_routers / num_rows) + assert(num_columns * num_rows == num_routers) + caches_per_router, remainder = divmod(len(cache_nodes), num_routers) + assert(remainder == 0) + assert(len(dir_nodes) == 4) + + # Create the routers in the mesh + routers = [Router(router_id=i) for i in range(num_routers)] + + # link counter to set unique link ids + link_count = 0 + + # Connect each cache controller to the appropriate router + ext_links = [] + for (i, n) in enumerate(cache_nodes): + cntrl_level, router_id = divmod(i, num_routers) + assert(cntrl_level < caches_per_router) + ext_links.append(ExtLink(link_id=link_count, ext_node=n, + int_node=routers[router_id])) + link_count += 1 + + # Connect the dir nodes to the corners. + ext_links.append(ExtLink(link_id=link_count, ext_node=dir_nodes[0], + int_node=routers[0])) + link_count += 1 + ext_links.append(ExtLink(link_id=link_count, ext_node=dir_nodes[1], + int_node=routers[num_columns - 1])) + link_count += 1 + ext_links.append(ExtLink(link_id=link_count, ext_node=dir_nodes[2], + int_node=routers[num_routers - num_columns])) + link_count += 1 + ext_links.append(ExtLink(link_id=link_count, ext_node=dir_nodes[3], + int_node=routers[num_routers - 1])) + link_count += 1 + + # Connect the dma nodes to router 0. These should only be DMA nodes. + for (i, node) in enumerate(dma_nodes): + assert(node.type == 'DMA_Controller') + ext_links.append(ExtLink(link_id=link_count, ext_node=node, int_node=routers[0])) + + # Create the mesh links. First row (east-west) links then column + # (north-south) links + int_links = [] + for row in xrange(num_rows): + for col in xrange(num_columns): + if (col + 1 < num_columns): + east_id = col + (row * num_columns) + west_id = (col + 1) + (row * num_columns) + int_links.append(IntLink(link_id=link_count, + node_a=routers[east_id], + node_b=routers[west_id], + weight=1)) + link_count += 1 + + for col in xrange(num_columns): + for row in xrange(num_rows): + if (row + 1 < num_rows): + north_id = col + (row * num_columns) + south_id = col + ((row + 1) * num_columns) + int_links.append(IntLink(link_id=link_count, + node_a=routers[north_id], + node_b=routers[south_id], + weight=2)) + link_count += 1 + + return routers, int_links, ext_links |