#!/usr/bin/env python3 # # This file is part of LiteX-Boards. # # Copyright (c) 2021 Ilia Sergachev # SPDX-License-Identifier: BSD-2-Clause import argparse from migen import * from litex_boards.platforms import digilent_zedboard from litex.build.xilinx.vivado import vivado_build_args, vivado_build_argdict from litex.build.tools import write_to_file from litex.soc.interconnect import axi from litex.soc.interconnect import wishbone 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.cores.led import LedChaser # CRG ---------------------------------------------------------------------------------------------- class _CRG(Module): def __init__(self, platform, sys_clk_freq, use_ps7_clk=False): self.rst = Signal() self.clock_domains.cd_sys = ClockDomain() # # # if use_ps7_clk: self.comb += ClockSignal("sys").eq(ClockSignal("ps7")) self.comb += ResetSignal("sys").eq(ResetSignal("ps7") | self.rst) else: self.submodules.pll = pll = S7PLL(speedgrade=-1) self.comb += pll.reset.eq(self.rst) pll.register_clkin(platform.request(platform.default_clk_name), platform.default_clk_freq) pll.create_clkout(self.cd_sys, sys_clk_freq) # Ignore sys_clk to pll.clkin path created by SoC's rst. platform.add_false_path_constraints(self.cd_sys.clk, pll.clkin) # BaseSoC ------------------------------------------------------------------------------------------ class BaseSoC(SoCCore): def __init__(self, sys_clk_freq, with_led_chaser=True, **kwargs): platform = digilent_zedboard.Platform() if kwargs.get("cpu_type", None) == "zynq7000": kwargs['integrated_sram_size'] = 0 # SoCCore ---------------------------------------------------------------------------------- SoCCore.__init__(self, platform, sys_clk_freq, ident = "LiteX SoC on Zedboard", ident_version = True, **kwargs) # Zynq7000 Integration --------------------------------------------------------------------- if kwargs.get("cpu_type", None) == "zynq7000": self.cpu.set_ps7(name="Zynq", preset="ZedBoard", config={'PCW_FPGA0_PERIPHERAL_FREQMHZ': sys_clk_freq / 1e6}) # Connect AXI GP0 to the SoC wb_gp0 = wishbone.Interface() self.submodules += axi.AXI2Wishbone( axi = self.cpu.add_axi_gp_master(), wishbone = wb_gp0, base_address = 0x43c0_0000) # default GP0 address on Zynq self.add_wb_master(wb_gp0) # FIXME: collection of hacks to enable BIOS compilation self.bus.add_region("sram", SoCRegion( origin=128 * 1024 * 1024, size=256 * 1024 * 1024) ) self.bus.add_region("rom", SoCRegion( origin=256 * 1024 * 1024, size=8 * 1024 * 1024, linker=True) ) self.cpu.use_rom = True self.constants['CONFIG_CLOCK_FREQUENCY'] = 666666687 use_ps7_clk = True else: use_ps7_clk = False # CRG -------------------------------------------------------------------------------------- self.submodules.crg = _CRG(platform, sys_clk_freq, use_ps7_clk) # Leds ------------------------------------------------------------------------------------- if with_led_chaser: self.submodules.leds = LedChaser( pads = platform.request_all("user_led"), sys_clk_freq = sys_clk_freq) def finalize(self, *args, **kwargs): super(BaseSoC, self).finalize(*args, **kwargs) if self.cpu_type != "zynq7000": return libxil_path = os.path.join(self.builder.software_dir, 'libxil') os.makedirs(os.path.realpath(libxil_path), exist_ok=True) lib = os.path.join(libxil_path, 'embeddedsw') if not os.path.exists(lib): os.system("git clone --depth 1 https://github.com/Xilinx/embeddedsw {}".format(lib)) os.makedirs(os.path.realpath(self.builder.include_dir), exist_ok=True) for header in [ 'XilinxProcessorIPLib/drivers/uartps/src/xuartps_hw.h', 'lib/bsp/standalone/src/common/xil_types.h', 'lib/bsp/standalone/src/common/xil_assert.h', 'lib/bsp/standalone/src/common/xil_io.h', 'lib/bsp/standalone/src/common/xil_printf.h', 'lib/bsp/standalone/src/common/xstatus.h', 'lib/bsp/standalone/src/common/xdebug.h', 'lib/bsp/standalone/src/arm/cortexa9/xpseudo_asm.h', 'lib/bsp/standalone/src/arm/cortexa9/xreg_cortexa9.h', 'lib/bsp/standalone/src/arm/cortexa9/xil_cache.h', 'lib/bsp/standalone/src/arm/cortexa9/xparameters_ps.h', 'lib/bsp/standalone/src/arm/cortexa9/xil_errata.h', 'lib/bsp/standalone/src/arm/cortexa9/xtime_l.h', 'lib/bsp/standalone/src/arm/common/xil_exception.h', 'lib/bsp/standalone/src/arm/common/gcc/xpseudo_asm_gcc.h', ]: shutil.copy(os.path.join(lib, header), self.builder.include_dir) write_to_file(os.path.join(self.builder.include_dir, 'bspconfig.h'), '#define FPU_HARD_FLOAT_ABI_ENABLED 1') write_to_file(os.path.join(self.builder.include_dir, 'xparameters.h'), ''' #ifndef __XPARAMETERS_H #define __XPARAMETERS_H #include "xparameters_ps.h" #define STDOUT_BASEADDRESS 0xE0001000 #define XPAR_PS7_DDR_0_S_AXI_BASEADDR 0x00100000 #define XPAR_PS7_DDR_0_S_AXI_HIGHADDR 0x3FFFFFFF #endif ''') # Build -------------------------------------------------------------------------------------------- def main(): parser = argparse.ArgumentParser(description="LiteX SoC on Zedboard") parser.add_argument("--build", action="store_true", help="Build bitstream") parser.add_argument("--load", action="store_true", help="Load bitstream") parser.add_argument("--sys-clk-freq", default=100e6, help="System clock frequency (default: %(default)d)") builder_args(parser) soc_core_args(parser) vivado_build_args(parser) parser.set_defaults(cpu_type="zynq7000") parser.set_defaults(no_uart=True) args = parser.parse_args() soc = BaseSoC( sys_clk_freq=int(float(args.sys_clk_freq)), **soc_core_argdict(args) ) builder = Builder(soc, **builder_argdict(args)) if args.cpu_type == "zynq7000": soc.builder = builder builder.add_software_package('libxil') builder.add_software_library('libxil') builder.build(**vivado_build_argdict(args), run=args.build) if args.load: prog = soc.platform.create_programmer() prog.load_bitstream(os.path.join(builder.gateware_dir, soc.build_name + ".bit")) if __name__ == "__main__": main()