#!/usr/bin/env python3 # # This file is part of LiteX-Boards. # # Copyright (c) 2021 Sergiu Mosanu # Copyright (c) 2020-2021 Florent Kermarrec # Copyright (c) 2020 Antmicro # # SPDX-License-Identifier: BSD-2-Clause # To interface via the serial port use: # lxterm /dev/ttyUSBx --speed=115200 import os from migen import * from migen.genlib.resetsync import AsyncResetSynchronizer from litex.gen import * from litex_boards.platforms import xilinx_alveo_u280 from litex.soc.cores.clock import * from litex.soc.integration.soc_core import * from litex.soc.integration.soc import SoCRegion from litex.soc.integration.builder import * from litex.soc.interconnect.axi import * from litex.soc.interconnect.csr import * from litex.soc.cores.ram.xilinx_usp_hbm2 import USPHBM2 from litex.soc.cores.led import LedChaser from litedram.modules import MTA18ASF2G72PZ from litedram.phy import usddrphy from litepcie.phy.usppciephy import USPPCIEPHY from litepcie.software import generate_litepcie_software from litedram.common import * from litedram.frontend.axi import * from litescope import LiteScopeAnalyzer # CRG ---------------------------------------------------------------------------------------------- class _CRG(LiteXModule): def __init__(self, platform, sys_clk_freq, ddram_channel, with_hbm): if with_hbm: self.rst = Signal() self.cd_sys = ClockDomain() self.cd_hbm_ref = ClockDomain() self.cd_apb = ClockDomain() else: # ddr4 self.rst = Signal() self.cd_sys = ClockDomain() self.cd_sys4x = ClockDomain() self.cd_pll4x = ClockDomain() self.cd_idelay = ClockDomain() # # # if with_hbm: self.pll = pll = USMMCM(speedgrade=-2) self.comb += pll.reset.eq(self.rst) pll.register_clkin(platform.request("sysclk", ddram_channel), 100e6) pll.create_clkout(self.cd_sys, sys_clk_freq) pll.create_clkout(self.cd_hbm_ref, 100e6) pll.create_clkout(self.cd_apb, 100e6) platform.add_false_path_constraints(self.cd_sys.clk, self.cd_apb.clk) else: # ddr4 self.pll = pll = USMMCM(speedgrade=-2) self.comb += pll.reset.eq(self.rst) pll.register_clkin(platform.request("sysclk", ddram_channel), 100e6) pll.create_clkout(self.cd_pll4x, sys_clk_freq*4, buf=None, with_reset=False) pll.create_clkout(self.cd_idelay, 600e6) #, with_reset=False platform.add_false_path_constraints(self.cd_sys.clk, pll.clkin) # Ignore sys_clk to pll.clkin path created by SoC's rst. self.specials += [ Instance("BUFGCE_DIV", p_BUFGCE_DIVIDE=4, i_CE=1, i_I=self.cd_pll4x.clk, o_O=self.cd_sys.clk), Instance("BUFGCE", i_CE=1, i_I=self.cd_pll4x.clk, o_O=self.cd_sys4x.clk), # AsyncResetSynchronizer(self.cd_idelay, ~pll.locked), ] self.idelayctrl = USIDELAYCTRL(cd_ref=self.cd_idelay, cd_sys=self.cd_sys) # BaseSoC ------------------------------------------------------------------------------------------ class BaseSoC(SoCCore): def __init__(self, sys_clk_freq=150e6, ddram_channel=0, with_pcie = False, with_led_chaser = False, with_hbm = False, **kwargs): platform = xilinx_alveo_u280.Platform() if with_hbm: assert 225e6 <= sys_clk_freq <= 450e6 # CRG -------------------------------------------------------------------------------------- self.crg = _CRG(platform, sys_clk_freq, ddram_channel, with_hbm) # SoCCore ---------------------------------------------------------------------------------- kwargs["jtagbone_chain"] = 2 # Chain 1 already used by HBM2 debug probes. SoCCore.__init__(self, platform, sys_clk_freq, ident="LiteX SoC on Alveo U280 (ES1)", **kwargs) # HBM / DRAM ------------------------------------------------------------------------------- if with_hbm: # Add HBM Core. self.hbm = hbm = ClockDomainsRenamer({"axi": "sys"})(USPHBM2(platform)) # Get HBM .xci. os.system("wget https://github.com/litex-hub/litex-boards/files/6893157/hbm_0.xci.txt") os.makedirs("ip/hbm", exist_ok=True) os.system("mv hbm_0.xci.txt ip/hbm/hbm_0.xci") # Connect four of the HBM's AXI interfaces to the main bus of the SoC. for i in range(4): axi_hbm = hbm.axi[i] axi_lite_hbm = AXILiteInterface(data_width=256, address_width=33) self.submodules += AXILite2AXI(axi_lite_hbm, axi_hbm) self.bus.add_slave(f"hbm{i}", axi_lite_hbm, SoCRegion(origin=0x4000_0000 + 0x1000_0000*i, size=0x1000_0000)) # 256MB. # Link HBM2 channel 0 as main RAM self.bus.add_region("main_ram", SoCRegion(origin=0x4000_0000, size=0x1000_0000, linker=True)) # 256MB. else: # DDR4 SDRAM ------------------------------------------------------------------------------- if not self.integrated_main_ram_size: self.ddrphy = usddrphy.USPDDRPHY(platform.request("ddram", ddram_channel), memtype = "DDR4", cmd_latency = 1, # seems to work better with cmd_latency=1 sys_clk_freq = sys_clk_freq, iodelay_clk_freq = 600e6, is_rdimm = True) self.add_sdram("sdram", phy = self.ddrphy, module = MTA18ASF2G72PZ(sys_clk_freq, "1:4"), size = 0x40000000, l2_cache_size = kwargs.get("l2_size", 8192) ) # Firmware RAM (To ease initial LiteDRAM calibration support) -------------------------- self.add_ram("firmware_ram", 0x20000000, 0x8000) # PCIe ------------------------------------------------------------------------------------- if with_pcie: self.pcie_phy = USPPCIEPHY(platform, platform.request("pcie_x4"), data_width = 128, bar0_size = 0x20000) self.add_pcie(phy=self.pcie_phy, ndmas=1) # Leds ------------------------------------------------------------------------------------- if with_led_chaser: self.leds = LedChaser( pads = platform.request_all("gpio_led"), sys_clk_freq = sys_clk_freq) # Build -------------------------------------------------------------------------------------------- def main(): from litex.build.parser import LiteXArgumentParser parser = LiteXArgumentParser(platform=xilinx_alveo_u280.Platform, description="LiteX SoC on Alveo U280.") parser.add_target_argument("--sys-clk-freq", default=150e6, type=float, help="System clock frequency.") # HBM2 with 250MHz, DDR4 with 150MHz (1:4) parser.add_target_argument("--ddram-channel", default="0", help="DDRAM channel (0, 1, 2 or 3).") # also selects clk 0 or 1 parser.add_target_argument("--with-pcie", action="store_true", help="Enable PCIe support.") parser.add_target_argument("--driver", action="store_true", help="Generate PCIe driver.") parser.add_target_argument("--with-hbm", action="store_true", help="Use HBM2.") parser.add_target_argument("--with-analyzer", action="store_true", help="Enable Analyzer.") parser.add_target_argument("--with-led-chaser", action="store_true", help="Enable LED Chaser.") args = parser.parse_args() if args.with_hbm: args.sys_clk_freq = 250e6 soc = BaseSoC( sys_clk_freq = args.sys_clk_freq, ddram_channel = int(args.ddram_channel, 0), with_pcie = args.with_pcie, with_led_chaser = args.with_led_chaser, with_hbm = args.with_hbm, with_analyzer = args.with_analyzer, **parser.soc_argdict ) builder = Builder(soc, **parser.builder_argdict) if args.build: builder.build(**parser.toolchain_argdict) if args.driver: generate_litepcie_software(soc, os.path.join(builder.output_dir, "driver")) if args.load: prog = soc.platform.create_programmer() prog.load_bitstream(builder.get_bitstream_filename(mode="sram")) if __name__ == "__main__": main()