74 lines
2.4 KiB
Python
74 lines
2.4 KiB
Python
from migen.fhdl.structure import *
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from migen.bus import dfi, asmibus
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from milkymist.asmicon.refresher import *
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from milkymist.asmicon.bankmachine import *
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from milkymist.asmicon.multiplexer import *
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class PhySettings:
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def __init__(self, dfi_d, nphases, rdphase, wrphase):
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self.dfi_d = dfi_d
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self.nphases = nphases
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self.rdphase = rdphase
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self.wrphase = wrphase
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class GeomSettings:
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def __init__(self, bank_a, row_a, col_a):
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self.bank_a = bank_a
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self.row_a = row_a
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self.col_a = col_a
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self.mux_a = max(row_a, col_a)
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class TimingSettings:
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def __init__(self, tRP, tRCD, tWR, tREFI, tRFC, CL, rd_delay, slot_time, read_time, write_time):
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self.tRP = tRP
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self.tRCD = tRCD
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self.tWR = tWR
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self.tREFI = tREFI
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self.tRFC = tRFC
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self.CL = CL
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self.rd_delay = rd_delay
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self.slot_time = slot_time
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self.read_time = read_time
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self.write_time = write_time
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class ASMIcon:
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def __init__(self, phy_settings, geom_settings, timing_settings):
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self.phy_settings = phy_settings
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self.geom_settings = geom_settings
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self.timing_settings = timing_settings
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self.finalized = False
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self.dfi = dfi.Interface(self.geom_settings.mux_a,
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self.geom_settings.bank_a,
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self.phy_settings.dfi_d,
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self.phy_settings.nphases)
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burst_length = self.phy_settings.nphases*2
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self.address_align = log2_int(burst_length)
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aw = self.geom_settings.bank_a + self.geom_settings.row_a + self.geom_settings.col_a - self.address_align
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dw = self.phy_settings.dfi_d*self.phy_settings.nphases
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self.hub = asmibus.Hub(aw, dw, self.timing_settings.slot_time)
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def finalize(self):
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if self.finalized:
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raise FinalizeError
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self.finalized = True
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self.hub.finalize()
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slots = self.hub.get_slots()
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self.refresher = Refresher(self.geom_settings.mux_a, self.geom_settings.bank_a,
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self.timing_settings.tRP, self.timing_settings.tREFI, self.timing_settings.tRFC)
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self.bank_machines = [BankMachine(self.geom_settings, self.timing_settings, self.address_align, i, slots) for i in range(2**self.geom_settings.bank_a)]
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self.multiplexer = Multiplexer(self.phy_settings, self.geom_settings, self.timing_settings,
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self.bank_machines, self.refresher,
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self.dfi, self.hub)
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def get_fragment(self):
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if not self.finalized:
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raise FinalizeError
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return self.hub.get_fragment() + \
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self.refresher.get_fragment() + \
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sum([bm.get_fragment() for bm in self.bank_machines], Fragment()) + \
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self.multiplexer.get_fragment()
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