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# Copyright (c) 2018 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.
#
# 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: Matteo Andreozzi
from m5.params import *
from AbstractMemory import AbstractMemory
from QoSTurnaround import *
# QoS Queue Selection policy used to select packets among same-QoS queues
class QoSQPolicy(Enum): vals = ["fifo", "lifo", "lrg"]
class QoSMemCtrl(AbstractMemory):
type = 'QoSMemCtrl'
cxx_header = "mem/qos/mem_ctrl.hh"
cxx_class = 'QoS::MemCtrl'
abstract = True
##### QoS support parameters ####
# Number of priorities in the system
qos_priorities = Param.Unsigned(1, "QoS priorities")
# QoS scheduler policy: tags request with QoS priority value
qos_policy = Param.QoSPolicy(NULL,
"Memory Controller Requests QoS arbitration policy")
# Select QoS driven turnaround policy
# (direction switch triggered by highest priority buffer content)
qos_turnaround_policy = Param.QoSTurnaroundPolicy(NULL,
"Selects QoS driven turnaround policy")
# QoS Queue Select policy: selects packets among same priority level
# (only supported in QoSMemSinkCtrl)
qos_q_policy = Param.QoSQPolicy('fifo',
"Memory Controller Requests same-QoS selection policy")
# flag to select QoS syncronised scheduling
# (calls the scheduler on all masters at every packet arrival)
qos_syncro_scheduler = Param.Bool(False,
"Enables QoS syncronized scheduling")
# flag to enable QoS priority escalation
qos_priority_escalation = Param.Bool(False,
"Enables QoS priority escalation")
# Master ID to be mapped to service parameters in QoS schedulers
qos_masters = VectorParam.String(['']* 16,
"Master Names to be mapped to service parameters in QoS scheduler")
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