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# Copyright (c) 2018 ARM Limited
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# Authors: Matteo Andreozzi
from m5.params import *
from m5.objects.AbstractMemory import AbstractMemory
from m5.objects.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")