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litex-boards/litex_boards/targets/alinx_axu2cga.py

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#!/usr/bin/env python3
#
# This file is part of LiteX-Boards.
#
# Copyright (c) 2022 Gwenhael Goavec-Merou <gwenhael.goavec-merou@trabucayre.com>
# 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()
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