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author | Erfan Azarkhish <erfan.azarkhish@unibo.it> | 2015-11-03 12:17:57 -0600 |
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committer | Erfan Azarkhish <erfan.azarkhish@unibo.it> | 2015-11-03 12:17:57 -0600 |
commit | 7e3f670457d2705c97078d6a20ee263fabd21ef4 (patch) | |
tree | 48e63ee4bd5e06b03f2b03017979ce48a52312be /src/mem/SerialLink.py | |
parent | 1530e1a690a7d3c1b028e59d2fa37c88df8e47df (diff) | |
download | gem5-7e3f670457d2705c97078d6a20ee263fabd21ef4.tar.xz |
mem: hmc: serial link model
This changeset adds a serial link model for the Hybrid Memory Cube (HMC).
SerialLink is a simple variation of the Bridge class, with the ability to
account for the latency of packet serialization. Also trySendTiming has been
modified to correctly model bandwidth.
Committed by: Nilay Vaish <nilay@cs.wisc.edu>
Diffstat (limited to 'src/mem/SerialLink.py')
-rw-r--r-- | src/mem/SerialLink.py | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/src/mem/SerialLink.py b/src/mem/SerialLink.py new file mode 100644 index 000000000..f05f2872d --- /dev/null +++ b/src/mem/SerialLink.py @@ -0,0 +1,63 @@ +# 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. +# +# 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: Ali Saidi +# Andreas Hansson +# Erfan Azarkhish + +from m5.params import * +from MemObject import MemObject + +# SerialLink is a simple variation of the Bridge class, with the ability to +# account for the latency of packet serialization. + +class SerialLink(MemObject): + type = 'SerialLink' + cxx_header = "mem/serial_link.hh" + slave = SlavePort('Slave port') + master = MasterPort('Master 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)") |