QoSMemCtrl.py revision 12966
112966SMatteo.Andreozzi@arm.com# Copyright (c) 2018 ARM Limited 212966SMatteo.Andreozzi@arm.com# All rights reserved. 312966SMatteo.Andreozzi@arm.com# 412966SMatteo.Andreozzi@arm.com# The license below extends only to copyright in the software and shall 512966SMatteo.Andreozzi@arm.com# not be construed as granting a license to any other intellectual 612966SMatteo.Andreozzi@arm.com# property including but not limited to intellectual property relating 712966SMatteo.Andreozzi@arm.com# to a hardware implementation of the functionality of the software 812966SMatteo.Andreozzi@arm.com# licensed hereunder. You may use the software subject to the license 912966SMatteo.Andreozzi@arm.com# terms below provided that you ensure that this notice is replicated 1012966SMatteo.Andreozzi@arm.com# unmodified and in its entirety in all distributions of the software, 1112966SMatteo.Andreozzi@arm.com# modified or unmodified, in source code or in binary form. 1212966SMatteo.Andreozzi@arm.com# 1312966SMatteo.Andreozzi@arm.com# Redistribution and use in source and binary forms, with or without 1412966SMatteo.Andreozzi@arm.com# modification, are permitted provided that the following conditions are 1512966SMatteo.Andreozzi@arm.com# met: redistributions of source code must retain the above copyright 1612966SMatteo.Andreozzi@arm.com# notice, this list of conditions and the following disclaimer; 1712966SMatteo.Andreozzi@arm.com# redistributions in binary form must reproduce the above copyright 1812966SMatteo.Andreozzi@arm.com# notice, this list of conditions and the following disclaimer in the 1912966SMatteo.Andreozzi@arm.com# documentation and/or other materials provided with the distribution; 2012966SMatteo.Andreozzi@arm.com# neither the name of the copyright holders nor the names of its 2112966SMatteo.Andreozzi@arm.com# contributors may be used to endorse or promote products derived from 2212966SMatteo.Andreozzi@arm.com# this software without specific prior written permission. 2312966SMatteo.Andreozzi@arm.com# 2412966SMatteo.Andreozzi@arm.com# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 2512966SMatteo.Andreozzi@arm.com# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 2612966SMatteo.Andreozzi@arm.com# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 2712966SMatteo.Andreozzi@arm.com# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 2812966SMatteo.Andreozzi@arm.com# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 2912966SMatteo.Andreozzi@arm.com# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 3012966SMatteo.Andreozzi@arm.com# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 3112966SMatteo.Andreozzi@arm.com# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 3212966SMatteo.Andreozzi@arm.com# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 3312966SMatteo.Andreozzi@arm.com# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 3412966SMatteo.Andreozzi@arm.com# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 3512966SMatteo.Andreozzi@arm.com# 3612966SMatteo.Andreozzi@arm.com# Authors: Matteo Andreozzi 3712966SMatteo.Andreozzi@arm.com 3812966SMatteo.Andreozzi@arm.comfrom m5.params import * 3912966SMatteo.Andreozzi@arm.comfrom AbstractMemory import AbstractMemory 4012966SMatteo.Andreozzi@arm.comfrom QoSTurnaround import * 4112966SMatteo.Andreozzi@arm.com 4212966SMatteo.Andreozzi@arm.com# QoS Queue Selection policy used to select packets among same-QoS queues 4312966SMatteo.Andreozzi@arm.comclass QoSQPolicy(Enum): vals = ["fifo", "lifo", "lrg"] 4412966SMatteo.Andreozzi@arm.com 4512966SMatteo.Andreozzi@arm.comclass QoSMemCtrl(AbstractMemory): 4612966SMatteo.Andreozzi@arm.com type = 'QoSMemCtrl' 4712966SMatteo.Andreozzi@arm.com cxx_header = "mem/qos/mem_ctrl.hh" 4812966SMatteo.Andreozzi@arm.com cxx_class = 'QoS::MemCtrl' 4912966SMatteo.Andreozzi@arm.com abstract = True 5012966SMatteo.Andreozzi@arm.com 5112966SMatteo.Andreozzi@arm.com ##### QoS support parameters #### 5212966SMatteo.Andreozzi@arm.com 5312966SMatteo.Andreozzi@arm.com # Number of priorities in the system 5412966SMatteo.Andreozzi@arm.com qos_priorities = Param.Unsigned(1, "QoS priorities") 5512966SMatteo.Andreozzi@arm.com 5612966SMatteo.Andreozzi@arm.com # QoS scheduler policy: tags request with QoS priority value 5712966SMatteo.Andreozzi@arm.com qos_policy = Param.QoSPolicy(NULL, 5812966SMatteo.Andreozzi@arm.com "Memory Controller Requests QoS arbitration policy") 5912966SMatteo.Andreozzi@arm.com 6012966SMatteo.Andreozzi@arm.com # Select QoS driven turnaround policy 6112966SMatteo.Andreozzi@arm.com # (direction switch triggered by highest priority buffer content) 6212966SMatteo.Andreozzi@arm.com qos_turnaround_policy = Param.QoSTurnaroundPolicy(NULL, 6312966SMatteo.Andreozzi@arm.com "Selects QoS driven turnaround policy") 6412966SMatteo.Andreozzi@arm.com 6512966SMatteo.Andreozzi@arm.com # QoS Queue Select policy: selects packets among same priority level 6612966SMatteo.Andreozzi@arm.com # (only supported in QoSMemSinkCtrl) 6712966SMatteo.Andreozzi@arm.com qos_q_policy = Param.QoSQPolicy('fifo', 6812966SMatteo.Andreozzi@arm.com "Memory Controller Requests same-QoS selection policy") 6912966SMatteo.Andreozzi@arm.com 7012966SMatteo.Andreozzi@arm.com # flag to select QoS syncronised scheduling 7112966SMatteo.Andreozzi@arm.com # (calls the scheduler on all masters at every packet arrival) 7212966SMatteo.Andreozzi@arm.com qos_syncro_scheduler = Param.Bool(False, 7312966SMatteo.Andreozzi@arm.com "Enables QoS syncronized scheduling") 7412966SMatteo.Andreozzi@arm.com 7512966SMatteo.Andreozzi@arm.com # flag to enable QoS priority escalation 7612966SMatteo.Andreozzi@arm.com qos_priority_escalation = Param.Bool(False, 7712966SMatteo.Andreozzi@arm.com "Enables QoS priority escalation") 7812966SMatteo.Andreozzi@arm.com 7912966SMatteo.Andreozzi@arm.com # Master ID to be mapped to service parameters in QoS schedulers 8012966SMatteo.Andreozzi@arm.com qos_masters = VectorParam.String(['']* 16, 8112966SMatteo.Andreozzi@arm.com "Master Names to be mapped to service parameters in QoS scheduler") 82