# Copyright (c) 2011 Advanced Micro Devices, Inc.
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#
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# redistributions in binary form must reproduce the above copyright
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# this software without specific prior written permission.
#
# 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,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# Authors: Steve Reinhardt
#          Brad Beckmann

from m5.params import *
from m5.SimObject import SimObject

class BasicLink(SimObject):
    type = 'BasicLink'
    cxx_header = "mem/ruby/network/BasicLink.hh"
    link_id = Param.Int("ID in relation to other links")
    latency = Param.Cycles(1, "latency")
    # Width of the link in bytes
    # Only used by simple network.
    # Garnet models this by flit size
    bandwidth_factor = Param.Int("generic bandwidth factor, usually in bytes")
    weight = Param.Int(1, "used to restrict routing in shortest path analysis")

class BasicExtLink(BasicLink):
    type = 'BasicExtLink'
    cxx_header = "mem/ruby/network/BasicLink.hh"
    ext_node = Param.RubyController("External node")
    int_node = Param.BasicRouter("ID of internal node")
    bandwidth_factor = 16 # only used by simple network

class BasicIntLink(BasicLink):
    type = 'BasicIntLink'
    cxx_header = "mem/ruby/network/BasicLink.hh"
    src_node = Param.BasicRouter("Router on src end")
    dst_node = Param.BasicRouter("Router on dst end")

    # only used by Garnet.
    src_outport = Param.String("", "Outport direction at src router")
    dst_inport = Param.String("", "Inport direction at dst router")

    # only used by simple network
    bandwidth_factor = 16