litex-boards/litex_boards/official/targets/simple.py

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#!/usr/bin/env python3
# This file is Copyright (c) 2014-2019 Florent Kermarrec <florent@enjoy-digital.fr>
# This file is Copyright (c) 2013-2014 Sebastien Bourdeauducq <sb@m-labs.hk>
# License: BSD
import argparse
import importlib
from migen import *
from migen.genlib.io import CRG
from litex.soc.integration.soc_core import *
from litex.soc.integration.builder import *
from liteeth.phy import LiteEthPHY
from liteeth.mac import LiteEthMAC
# BaseSoC ------------------------------------------------------------------------------------------
class BaseSoC(SoCCore):
def __init__(self, platform, **kwargs):
sys_clk_freq = int(1e9/platform.default_clk_period)
SoCCore.__init__(self, platform, clk_freq=sys_clk_freq,
integrated_rom_size=0x8000,
integrated_main_ram_size=16*1024,
**kwargs)
self.submodules.crg = CRG(platform.request(platform.default_clk_name))
# EthernetSoC --------------------------------------------------------------------------------------
class EthernetSoC(BaseSoC):
mem_map = {
"ethmac": 0x30000000, # (shadow @0xb0000000)
}
mem_map.update(BaseSoC.mem_map)
def __init__(self, platform, **kwargs):
BaseSoC.__init__(self, platform, **kwargs)
self.submodules.ethphy = LiteEthPHY(platform.request("eth_clocks"),
platform.request("eth"))
self.add_csr("ethphy")
self.submodules.ethmac = LiteEthMAC(phy=self.ethphy, dw=32,
interface="wishbone", endianness=self.cpu.endianness, with_preamble_crc=False)
self.add_wb_slave(mem_decoder(self.mem_map["ethmac"]), self.ethmac.bus)
self.add_memory_region("ethmac", self.mem_map["ethmac"] | self.shadow_base, 0x2000)
self.add_csr("ethmac")
self.add_interrupt("ethmac")
# Build --------------------------------------------------------------------------------------------
def main():
parser = argparse.ArgumentParser(description="Generic LiteX SoC")
builder_args(parser)
soc_core_args(parser)
parser.add_argument("--with-ethernet", action="store_true",
help="enable Ethernet support")
parser.add_argument("platform",
help="module name of the platform to build for")
parser.add_argument("--gateware-toolchain", default=None,
help="FPGA gateware toolchain used for build")
args = parser.parse_args()
platform_module = importlib.import_module(args.platform)
if args.gateware_toolchain is not None:
platform = platform_module.Platform(toolchain=args.gateware_toolchain)
else:
platform = platform_module.Platform()
cls = EthernetSoC if args.with_ethernet else BaseSoC
soc = cls(platform, **soc_core_argdict(args))
builder = Builder(soc, **builder_argdict(args))
builder.build()
if __name__ == "__main__":
main()