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# Copyright (c) 2018-2020 ARM Limited
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from m5.params import *
from m5.proxy import *
from m5.objects.ClockedObject import ClockedObject
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(ClockedObject):
type = "QoSMemCtrl"
cxx_header = "mem/qos/mem_ctrl.hh"
cxx_class = "gem5::memory::qos::MemCtrl"
abstract = True
system = Param.System(Parent.any, "System that the controller belongs to.")
##### 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 requestors 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"
)
# Requestor ID to be mapped to service parameters in QoS schedulers
qos_requestors = VectorParam.String(
[""] * 16,
"Requestor Names to be mapped to service parameters in QoS scheduler",
)
qos_masters = DeprecatedParam(
qos_requestors, "`qos_master` is now called `qos_requestors`"
)