#!/usr/bin/env python3 # # This file is part of LiteX-Boards. # # Copyright (c) 2022 Gwenhael Goavec-Merou # SPDX-License-Identifier: BSD-2-Clause # Build/Use: # The current support is sufficient to run LiteX BIOS on Cortex-A53 core #0: # ./alinx_axu2cga.py --build --load # LiteX BIOS can then be executed on hardware using JTAG with the following xsct script from: # https://github.com/trabucayre/litex-template/ # make -f Makefile.axu2cga load will build everything and run xsct in the end. # # Relies on https://github.com/lucaceresoli/zynqmp-pmufw-builder to create a generic PMU firmware; # first build will take a while because it includes a cross-toolchain. import os from migen import * from litex.gen import * from litex_boards.platforms import alinx_axu2cga 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_psu_clk=False): self.rst = Signal() self.cd_sys = ClockDomain() # # # if use_psu_clk: self.comb += [ ClockSignal("sys").eq(ClockSignal("ps")), ResetSignal("sys").eq(ResetSignal("ps") | self.rst), ] else: # Clk clk25 = platform.request("clk25") # PLL self.pll = pll = USMMCM(speedgrade=-1) self.comb += pll.reset.eq(self.rst) pll.register_clkin(clk25, 25e6) 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=25e6, with_led_chaser=True, **kwargs): platform = alinx_axu2cga.Platform() # CRG -------------------------------------------------------------------------------------- use_psu_clk = (kwargs.get("cpu_type", None) == "zynqmp") self.crg = _CRG(platform, sys_clk_freq, use_psu_clk) # SoCCore ---------------------------------------------------------------------------------- if kwargs.get("cpu_type", None) == "zynqmp": kwargs["integrated_sram_size"] = 0 kwargs["with_uart"] = False SoCCore.__init__(self, platform, sys_clk_freq, ident="LiteX SoC on Alinx AXU2CGA", **kwargs) # ZynqMP Integration --------------------------------------------------------------------- if kwargs.get("cpu_type", None) == "zynqmp": self.cpu.config.update(platform.psu_config) self.bus.add_region("sram", SoCRegion( origin = self.cpu.mem_map["sram"], size = 1 * GIGABYTE) # DDR ) self.bus.add_region("rom", SoCRegion( origin = self.cpu.mem_map["rom"], size = 512 * MEGABYTE // 8, linker = True) ) self.constants["CONFIG_CLOCK_FREQUENCY"] = 1199880127 # 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 != "zynqmp": 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/ARMv8/64bit/xpseudo_asm.h', 'lib/bsp/standalone/src/arm/ARMv8/64bit/xreg_cortexa53.h', 'lib/bsp/standalone/src/arm/ARMv8/64bit/xil_cache.h', 'lib/bsp/standalone/src/arm/ARMv8/64bit/xil_errata.h', 'lib/bsp/standalone/src/arm/ARMv8/64bit/platform/ZynqMP/xparameters_ps.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'), """ #ifndef BSPCONFIG_H #define BSPCONFIG_H #define EL3 1 #define EL1_NONSECURE 0 #endif """) write_to_file(os.path.join(self.builder.include_dir, 'xparameters.h'), ''' #ifndef XPARAMETERS_H #define XPARAMETERS_H #include "xparameters_ps.h" #define STDIN_BASEADDRESS 0xFF010000 #define STDOUT_BASEADDRESS 0xFF010000 #define XPAR_PSU_DDR_0_S_AXI_BASEADDR 0x00000000 #define XPAR_PSU_DDR_0_S_AXI_HIGHADDR 0x7FFFFFFF #define XPAR_PSU_DDR_1_S_AXI_BASEADDR 0x800000000 #define XPAR_PSU_DDR_1_S_AXI_HIGHADDR 0x87FFFFFFF #define XPAR_CPU_CORTEXA53_0_TIMESTAMP_CLK_FREQ 99999005 #endif ''') # Build -------------------------------------------------------------------------------------------- def main(): from litex.build.parser import LiteXArgumentParser parser = LiteXArgumentParser(platform=alinx_axu2cga.Platform, description="LiteX SoC on Alinx AXU2CGA.") parser.add_target_argument("--cable", default="ft232", help="JTAG interface.") parser.add_target_argument("--sys-clk-freq", default=25e6, type=float, help="System clock frequency.") parser.set_defaults(cpu_type="zynqmp") args = parser.parse_args() soc = BaseSoC( sys_clk_freq=args.sys_clk_freq, **parser.soc_argdict ) builder = Builder(soc, **parser.builder_argdict) if args.cpu_type == "zynqmp": 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(args.cable) prog.load_bitstream(builder.get_bitstream_filename(mode="sram")) if __name__ == "__main__": main()