65 lines
2.0 KiB
Python
65 lines
2.0 KiB
Python
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from migen.fhdl.std import *
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from migen.bus import dfi, lasmibus
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from milkymist.lasmicon.refresher import *
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from milkymist.lasmicon.bankmachine import *
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from milkymist.lasmicon.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, tWTR, tREFI, tRFC, CL, read_latency, write_latency, 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.tWTR = tWTR
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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.read_latency = read_latency
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self.write_latency = write_latency
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self.read_time = read_time
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self.write_time = write_time
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class LASMIcon(Module):
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def __init__(self, phy_settings, geom_settings, timing_settings):
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burst_length = phy_settings.nphases*2 # command multiplication*DDR
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address_align = log2_int(burst_length)
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self.dfi = dfi.Interface(geom_settings.mux_a,
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geom_settings.bank_a,
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phy_settings.dfi_d,
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phy_settings.nphases)
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self.lasmic = lasmibus.Interface(
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aw=geom_settings.row_a + geom_settings.col_a - address_align,
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dw=phy_settings.dfi_d*phy_settings.nphases,
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nbanks=2**geom_settings.bank_a,
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read_latency=timing_settings.read_latency,
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write_latency=timing_settings.write_latency)
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self.nrowbits = geom_settings.col_a - address_align
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###
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self.submodules.refresher = Refresher(geom_settings.mux_a, geom_settings.bank_a,
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timing_settings.tRP, timing_settings.tREFI, timing_settings.tRFC)
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self.submodules.bank_machines = [BankMachine(geom_settings, timing_settings, address_align, i,
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getattr(self.lasmic, "bank"+str(i)))
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for i in range(2**geom_settings.bank_a)]
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self.submodules.multiplexer = Multiplexer(phy_settings, geom_settings, timing_settings,
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self.bank_machines, self.refresher,
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self.dfi, self.lasmic)
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