#!/usr/bin/env python3 # # This file is part of LiteX-Boards. # # Copyright (c) 2021 Gwenhael Goavec-Merou # SPDX-License-Identifier: BSD-2-Clause from migen import * from litex.gen import LiteXModule from litex_boards.platforms import digilent_arty_z7 from litex.build import tools from litex.build.xilinx import common as xil_common 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(LiteXModule): def __init__(self, platform, sys_clk_freq, use_ps7_clk=False): self.rst = Signal() self.cd_sys = ClockDomain() # # # if use_ps7_clk: self.comb += ClockSignal("sys").eq(ClockSignal("ps7")) self.comb += ResetSignal("sys").eq(ResetSignal("ps7") | self.rst) else: # Clk. clk125 = platform.request("clk125") # PLL. self.pll = pll = S7PLL(speedgrade=-1) self.comb += pll.reset.eq(self.rst) pll.register_clkin(clk125, 125e6) 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, variant="z7-20", toolchain="vivado", sys_clk_freq=125e6, with_led_chaser = True, **kwargs): platform = digilent_arty_z7.Platform(variant=variant, toolchain=toolchain) # CRG -------------------------------------------------------------------------------------- use_ps7_clk = (kwargs.get("cpu_type", None) == "zynq7000") self.crg = _CRG(platform, sys_clk_freq, use_ps7_clk) # SoCCore ---------------------------------------------------------------------------------- if kwargs.get("cpu_type", None) == "zynq7000": kwargs["integrated_sram_size"] = 0 kwargs["with_uart"] = False self.mem_map = { 'csr': 0x4000_0000, # Zynq GP0 default } SoCCore.__init__(self, platform, sys_clk_freq, ident="LiteX SoC on Arty Z7", **kwargs) # Zynq7000 Integration --------------------------------------------------------------------- if kwargs.get("cpu_type", None) == "zynq7000": assert toolchain == "vivado", ' not tested / specific vivado cmds' self.cpu.set_ps7(name="Zynq", config={ **platform.ps7_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 = self.mem_map["csr"]) self.bus.add_master(master=wb_gp0) self.bus.add_region("sram", SoCRegion( origin = self.cpu.mem_map["sram"], size = 512 * 1024 * 1024 - self.cpu.mem_map["sram"]) ) self.bus.add_region("rom", SoCRegion( origin = self.cpu.mem_map["rom"], size = 256 * 1024 * 1024 // 8, linker = True) ) self.constants["CONFIG_CLOCK_FREQUENCY"] = 666666687 self.bus.add_region("flash", SoCRegion(origin=0xFC00_0000, size=0x4_0000, mode="rwx")) # Leds ------------------------------------------------------------------------------------- if with_led_chaser: self.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 0xE0000000 #define XPAR_PS7_DDR_0_S_AXI_BASEADDR 0x00100000 #define XPAR_PS7_DDR_0_S_AXI_HIGHADDR 0x1FFFFFFF #endif ''') # Build -------------------------------------------------------------------------------------------- def main(): from litex.build.parser import LiteXArgumentParser parser = LiteXArgumentParser(platform=digilent_arty_z7.Platform, description="LiteX SoC on Arty Z7") parser.add_target_argument("--variant", default="z7-20", help="Board variant (z7-20 or z7-10).") parser.add_target_argument("--sys-clk-freq", default=125e6, type=float, help="System clock frequency.") parser.set_defaults(cpu_type="zynq7000") parser.set_defaults(no_uart=True) args = parser.parse_args() soc = BaseSoC( variant = args.variant, toolchain = args.toolchain, sys_clk_freq = args.sys_clk_freq, **parser.soc_argdict ) builder = Builder(soc, **parser.builder_argdict) if args.cpu_type == "zynq7000": soc.builder = builder builder.add_software_package('libxil') builder.add_software_library('libxil') if args.build: builder.build(**parser.toolchain_argdict) if args.load: prog = soc.platform.create_programmer() prog.load_bitstream(builder.get_bitstream_filename(mode="sram"), device=1) if __name__ == "__main__": main()