# Copyright (c) 2011 Advanced Micro Devices, Inc.
#               2011 Massachusetts Institute of Technology
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#
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# this software without specific prior written permission.
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# Authors: Brad Beckmann
#          Tushar Krishna

from m5.params import *
from m5.objects import *

from BaseTopology import SimpleTopology

class Pt2Pt(SimpleTopology):
    description='Pt2Pt'

    def __init__(self, controllers):
        self.nodes = controllers

    def makeTopology(self, options, IntLink, ExtLink, Router):
        nodes = self.nodes
        # Create an individual router for each controller, and connect all to all.

        routers = [Router(router_id=i) for i in range(len(nodes))]
        ext_links = [ExtLink(link_id=i, ext_node=n, int_node=routers[i])
                    for (i, n) in enumerate(nodes)]
        link_count = len(nodes)

        int_links = []
        for i in xrange(len(nodes)):
            for j in xrange(len(nodes)):
                if (i != j):
                    link_count += 1
                    int_links.append(IntLink(link_id=link_count,
                                            node_a=routers[i],
                                            node_b=routers[j]))

        return routers, int_links, ext_links
