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# Copyright (c) 2012-2013 ARM Limited
# All rights reserved.
#
# The license below extends only to copyright in the software and shall
# not be construed as granting a license to any other intellectual
# property including but not limited to intellectual property relating
# to a hardware implementation of the functionality of the software
# licensed hereunder. You may use the software subject to the license
# terms below provided that you ensure that this notice is replicated
# unmodified and in its entirety in all distributions of the software,
# modified or unmodified, in source code or in binary form.
#
# Copyright (c) 2006-2007 The Regents of The University of Michigan
# Copyright (c) 2015 The University of Bologna
# All rights reserved.
#
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# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
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# redistributions in binary form must reproduce the above copyright
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# neither the name of the copyright holders nor the names of its
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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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from m5.params import *
from m5.objects.ClockedObject import ClockedObject
# SerialLink is a simple variation of the Bridge class, with the ability to
# account for the latency of packet serialization.
class SerialLink(ClockedObject):
type = 'SerialLink'
cxx_header = "mem/serial_link.hh"
mem_side_port = RequestPort("This port sends requests and "
"receives responses")
master = DeprecatedParam(mem_side_port,
'`master` is now called `mem_side_port`')
cpu_side_port = ResponsePort("This port receives requests and "
"sends responses")
slave = DeprecatedParam(cpu_side_port,
'`slave` is now called `cpu_side_port`')
req_size = Param.Unsigned(16, "The number of requests to buffer")
resp_size = Param.Unsigned(16, "The number of responses to buffer")
delay = Param.Latency('0ns', "The latency of this serial_link")
ranges = VectorParam.AddrRange([AllMemory],
"Address ranges to pass through the serial_link")
# Bandwidth of the serial link is determined by the clock domain which the
# link belongs to and the number of lanes:
num_lanes = Param.Unsigned(1, "Number of parallel lanes inside the serial"
"link. (aka. lane width)")
link_speed = Param.UInt64(1, "Gb/s Speed of each parallel lane inside the"
"serial link. (aka. lane speed)")