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# Authors: Andreas Hansson
from m5.SimObject import SimObject
from m5.params import *
from m5.proxy import *
# Enumerate set of allowed power states that can be used by a clocked object.
# The list is kept generic to express a base minimal set.
# State definition :-
# Undefined: Invalid state, no power state derived information is available.
# On: The logic block is actively running and consuming dynamic and leakage
# energy depending on the amount of processing required.
# Clk_gated: The clock circuity within the block is gated to save dynamic
# energy, the power supply to the block is still on and leakage
# energy is being consumed by the block.
# Sram_retention: The SRAMs within the logic blocks are pulled into retention
# state to reduce leakage energy further.
# Off: The logic block is power gated and is not consuming any energy.
class PwrState(Enum): vals = ['UNDEFINED',
'ON',
'CLK_GATED',
'SRAM_RETENTION',
'OFF']
class ClockedObject(SimObject):
type = 'ClockedObject'
abstract = True
cxx_header = "sim/clocked_object.hh"
# The clock domain this clocked object belongs to, inheriting the
# parent's clock domain by default
clk_domain = Param.ClockDomain(Parent.clk_domain, "Clock domain")
# Power model for this ClockedObject
power_model = VectorParam.PowerModel([], "Power models")
# Provide initial power state, should ideally get redefined in startup
# routine
default_p_state = Param.PwrState("UNDEFINED", "Default Power State")
p_state_clk_gate_min = Param.Latency('1ns',"Min value of the distribution")
p_state_clk_gate_max = Param.Latency('1s',"Max value of the distribution")
p_state_clk_gate_bins = Param.Unsigned('20',
"# bins in clk gated distribution")