+from fractions import Fraction
+from math import ceil
+
from migen.fhdl.structure import *
from migen.fhdl import verilog, autofragment
-from migen.bus import wishbone, asmibus, wishbone2asmi, csr, wishbone2csr
+from migen.bus import wishbone, wishbone2asmi, csr, wishbone2csr, dfi
-from milkymist import m1reset, clkfx, lm32, norflash, uart, sram
-import constraints
+from milkymist import m1crg, lm32, norflash, uart, sram, s6ddrphy, dfii, asmicon, \
+ identifier, timer, minimac3, framebuffer, asmiprobe
+from cmacros import get_macros
+from constraints import Constraints
MHz = 1000000
-clk_freq = 80*MHz
+clk_freq = (83 + Fraction(1, 3))*MHz
sram_size = 4096 # in bytes
l2_size = 8192 # in bytes
+clk_period_ns = 1000000000/clk_freq
+def ns(t, margin=True):
+ if margin:
+ t += clk_period_ns/2
+ return ceil(t/clk_period_ns)
+
+sdram_phy = asmicon.PhySettings(
+ dfi_d=64,
+ nphases=2,
+ rdphase=0,
+ wrphase=1
+)
+sdram_geom = asmicon.GeomSettings(
+ bank_a=2,
+ row_a=13,
+ col_a=10
+)
+sdram_timing = asmicon.TimingSettings(
+ tRP=ns(15),
+ tRCD=ns(15),
+ tWR=ns(15),
+ tREFI=ns(7800, False),
+ tRFC=ns(70),
+
+ CL=3,
+ rd_delay=4,
+
+ read_time=32,
+ write_time=16
+)
+
+def ddrphy_clocking(crg, phy):
+ names = [
+ "clk2x_270",
+ "clk4x_wr",
+ "clk4x_wr_strb",
+ "clk4x_rd",
+ "clk4x_rd_strb"
+ ]
+ comb = [getattr(phy, name).eq(getattr(crg, name)) for name in names]
+ return Fragment(comb)
+
+csr_macros = get_macros("common/csrbase.h")
+def csr_offset(name):
+ base = int(csr_macros[name + "_BASE"], 0)
+ assert((base >= 0xe0000000) and (base <= 0xe0010000))
+ return (base - 0xe0000000)//0x800
+
+interrupt_macros = get_macros("common/interrupt.h")
+def interrupt_n(name):
+ return int(interrupt_macros[name + "_INTERRUPT"], 0)
+
+version = get_macros("common/version.h")["VERSION"][1:-1]
+
def get():
#
# ASMI
#
- asmihub0 = asmibus.Hub(24, 64, 8) # TODO: get hub from memory controller
- asmiport_wb = asmihub0.get_port()
- asmihub0.finalize()
+ asmicon0 = asmicon.ASMIcon(sdram_phy, sdram_geom, sdram_timing)
+ asmiport_wb = asmicon0.hub.get_port()
+ asmiport_fb = asmicon0.hub.get_port(2)
+ asmicon0.finalize()
+ #
+ # DFI
+ #
+ ddrphy0 = s6ddrphy.S6DDRPHY(sdram_geom.mux_a, sdram_geom.bank_a, sdram_phy.dfi_d)
+ dfii0 = dfii.DFIInjector(csr_offset("DFII"),
+ sdram_geom.mux_a, sdram_geom.bank_a, sdram_phy.dfi_d, sdram_phy.nphases)
+ dficon0 = dfi.Interconnect(dfii0.master, ddrphy0.dfi)
+ dficon1 = dfi.Interconnect(asmicon0.dfi, dfii0.slave)
+
#
# WISHBONE
#
cpu0 = lm32.LM32()
norflash0 = norflash.NorFlash(25, 12)
sram0 = sram.SRAM(sram_size//4)
+ minimac0 = minimac3.MiniMAC(csr_offset("MINIMAC"))
wishbone2asmi0 = wishbone2asmi.WB2ASMI(l2_size//4, asmiport_wb)
wishbone2csr0 = wishbone2csr.WB2CSR()
], [
(binc("000"), norflash0.bus),
(binc("001"), sram0.bus),
+ (binc("011"), minimac0.membus),
(binc("10"), wishbone2asmi0.wishbone),
(binc("11"), wishbone2csr0.wishbone)
],
#
# CSR
#
- uart0 = uart.UART(0, clk_freq, baud=115200)
- csrcon0 = csr.Interconnect(wishbone2csr0.csr, [uart0.bank.interface])
+ uart0 = uart.UART(csr_offset("UART"), clk_freq, baud=115200)
+ identifier0 = identifier.Identifier(csr_offset("ID"), 0x4D31, version, int(clk_freq))
+ timer0 = timer.Timer(csr_offset("TIMER0"))
+ fb0 = framebuffer.Framebuffer(csr_offset("FB"), asmiport_fb)
+ asmiprobe0 = asmiprobe.ASMIprobe(csr_offset("ASMIPROBE"), asmicon0.hub)
+ csrcon0 = csr.Interconnect(wishbone2csr0.csr, [
+ uart0.bank.interface,
+ dfii0.bank.interface,
+ identifier0.bank.interface,
+ timer0.bank.interface,
+ minimac0.bank.interface,
+ fb0.bank.interface,
+ asmiprobe0.bank.interface
+ ])
#
# Interrupts
#
interrupts = Fragment([
- cpu0.interrupt[0].eq(uart0.events.irq)
+ cpu0.interrupt[interrupt_n("UART")].eq(uart0.events.irq),
+ cpu0.interrupt[interrupt_n("TIMER0")].eq(timer0.events.irq),
+ cpu0.interrupt[interrupt_n("MINIMAC")].eq(minimac0.events.irq)
])
#
# Housekeeping
#
- clkfx_sys = clkfx.ClkFX(50*MHz, clk_freq)
- reset0 = m1reset.M1Reset()
+ crg0 = m1crg.M1CRG(50*MHz, clk_freq)
- frag = autofragment.from_local() + interrupts
+ vga_clocking = Fragment([
+ fb0.vga_clk.eq(crg0.vga_clk)
+ ])
+ frag = autofragment.from_local() \
+ + interrupts \
+ + ddrphy_clocking(crg0, ddrphy0) \
+ + vga_clocking
+ cst = Constraints(crg0, norflash0, uart0, ddrphy0, minimac0, fb0)
src_verilog, vns = verilog.convert(frag,
- {clkfx_sys.clkin, reset0.trigger_reset},
+ cst.get_ios(),
name="soc",
- clk_signal=clkfx_sys.clkout,
- rst_signal=reset0.sys_rst,
+ clk_signal=crg0.sys_clk,
+ rst_signal=crg0.sys_rst,
return_ns=True)
- src_ucf = constraints.get(vns, clkfx_sys, reset0, norflash0, uart0)
+ src_ucf = cst.get_ucf(vns)
return (src_verilog, src_ucf)
projects / litex.git / blobdiff