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microwatt/litedram/gen-src/generate.py

171 lines
5.9 KiB
Python

#!/usr/bin/python3
from fusesoc.capi2.generator import Generator
from litex.build.tools import write_to_file
from litex.build.tools import replace_in_file
from litex.build.generic_platform import *
from litex.build.xilinx import XilinxPlatform
from litex.build.lattice import LatticePlatform
from litex.soc.integration.builder import *
from litedram.gen import *
import subprocess
import os
import sys
import yaml
import shutil
def make_new_dir(base, added):
r = os.path.join(base, added)
if os.path.exists(r):
shutil.rmtree(r)
os.mkdir(r)
return r
gen_src_dir = os.path.dirname(os.path.realpath(__file__))
base_dir = os.path.normpath(os.path.join(gen_src_dir, os.pardir))
build_top_dir = make_new_dir(base_dir, "build")
gen_src_dir = os.path.join(base_dir, "gen-src")
gen_dir = make_new_dir(base_dir, "generated")
# Build the init code for microwatt-initialized DRAM
#
# XXX Not working yet
#
def build_init_code(build_dir, is_sim):
# More path fudging
sw_dir = os.path.join(build_dir, "software");
sw_inc_dir = os.path.join(sw_dir, "include")
gen_inc_dir = os.path.join(sw_inc_dir, "generated")
src_dir = os.path.join(gen_src_dir, "sdram_init")
lxbios_src_dir = os.path.join(soc_directory, "software", "bios")
lxbios_inc_dir = os.path.join(soc_directory, "software", "include")
print(" sw dir:", sw_dir)
print("gen_inc_dir:", gen_inc_dir)
print(" src dir:", src_dir)
print(" lx src dir:", lxbios_src_dir)
print(" lx inc dir:", lxbios_inc_dir)
# Generate mem.h
mem_h = "#define MAIN_RAM_BASE 0x40000000"
write_to_file(os.path.join(gen_inc_dir, "mem.h"), mem_h)
# Environment
env_vars = []
def _makefile_escape(s): # From LiteX
return s.replace("\\", "\\\\")
def add_var(k, v):
env_vars.append("{}={}\n".format(k, _makefile_escape(v)))
add_var("BUILD_DIR", sw_dir)
add_var("SRC_DIR", src_dir)
add_var("GENINC_DIR", sw_inc_dir)
add_var("LXSRC_DIR", lxbios_src_dir)
add_var("LXINC_DIR", lxbios_inc_dir)
if is_sim:
add_var("EXTRA_CFLAGS", "-D__SIM__")
write_to_file(os.path.join(gen_inc_dir, "variables.mak"), "".join(env_vars))
# Build init code
print(" Generating init software...")
makefile = os.path.join(src_dir, "Makefile")
r = subprocess.check_call(["make", "-C", build_dir, "-I", gen_inc_dir, "-f", makefile])
print("Make result:", r)
return os.path.join(sw_dir, "obj", "sdram_init.hex")
def generate_one(t, mw_init):
print("Generating target:", t)
# Is it a simulation ?
is_sim = t is "sim"
# Muck with directory path
build_dir = make_new_dir(build_top_dir, t)
t_dir = make_new_dir(gen_dir, t)
# Grab config file
cfile = os.path.join(gen_src_dir, t + ".yml")
core_config = yaml.load(open(cfile).read(), Loader=yaml.Loader)
### TODO: Make most stuff below a function in litedram gen.py and
### call it rather than duplicate it
###
# Convert YAML elements to Python/LiteX
for k, v in core_config.items():
replaces = {"False": False, "True": True, "None": None}
for r in replaces.keys():
if v == r:
core_config[k] = replaces[r]
if "clk_freq" in k:
core_config[k] = float(core_config[k])
if k == "sdram_module":
core_config[k] = getattr(litedram_modules, core_config[k])
if k == "sdram_phy":
core_config[k] = getattr(litedram_phys, core_config[k])
# Override values for mw_init
if mw_init:
core_config["cpu"] = None
core_config["csr_alignment"] = 64
# Generate core
if is_sim:
platform = SimPlatform("", io=[])
elif core_config["sdram_phy"] in [litedram_phys.ECP5DDRPHY]:
platform = LatticePlatform("LFE5UM5G-45F-8BG381C", io=[], toolchain="trellis")
elif core_config["sdram_phy"] in [litedram_phys.A7DDRPHY, litedram_phys.K7DDRPHY, litedram_phys.V7DDRPHY]:
platform = XilinxPlatform("", io=[], toolchain="vivado")
else:
raise ValueError("Unsupported SDRAM PHY: {}".format(core_config["sdram_phy"]))
soc = LiteDRAMCore(platform, core_config, is_sim = is_sim, integrated_rom_size=0x6000, csr_data_width=32)
# Build into build_dir
builder = Builder(soc, output_dir=build_dir, compile_gateware=False)
vns = builder.build(build_name="litedram_core", regular_comb=False)
# Grab generated gatewar dir
gw_dir = os.path.join(build_dir, "gateware")
# Generate init-cpu.txt and generate init code
cpu = core_config["cpu"]
if mw_init:
write_to_file(os.path.join(t_dir, "init-cpu.txt"), "none")
src_init_file = build_init_code(build_dir, is_sim)
src_initram_file = os.path.join(gen_src_dir, "dram-init-mem.vhdl")
else:
write_to_file(os.path.join(t_dir, "init-cpu.txt"), cpu)
src_init_file = os.path.join(gw_dir, "mem.init")
src_initram_file = os.path.join(gen_src_dir, "no-init-mem.vhdl")
# Copy generated files to target dir, amend them if necessary
initfile_name = "litedram_core.init"
core_file = os.path.join(gw_dir, "litedram_core.v")
dst_init_file = os.path.join(t_dir, initfile_name)
dst_initram_file = os.path.join(t_dir, "litedram-initmem.vhdl")
if not mw_init:
replace_in_file(core_file, "mem.init", initfile_name)
shutil.copyfile(src_init_file, dst_init_file)
shutil.copyfile(src_initram_file, dst_initram_file)
if is_sim:
initfile_path = os.path.join("litedram", "generated", "sim", initfile_name)
replace_in_file(dst_initram_file, initfile_name, initfile_path)
shutil.copy(core_file, t_dir)
def main():
targets = ['arty','nexys-video', 'sim']
# targets = ['sim']
# XXX Set mw_init to False to use a local VexRiscV for memory inits
for t in targets:
generate_one(t, mw_init = True)
# XXX TODO: Remove build dir unless told not to via cmdline option
if __name__ == "__main__":
main()