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diamond.py
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diamond.py
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# This file is Copyright (c) 2015 Florent Kermarrec <florent@enjoy-digital.fr>
# License: BSD
import os
import sys
import subprocess
import shutil
from migen.fhdl.structure import _Fragment
from migen.fhdl.verilog import DummyAttrTranslate
from migen.build.generic_platform import *
from migen.build import tools
from migen.build.lattice import common
def _get_bindir(path, ver=None):
if ver is None:
# _x64 suffix means StrictVersion will fail.
vers = list(tools.versions(path, strict=False))
if not vers:
raise OSError("no version directory for Diamond tools found in "
+ path)
ver = max(vers)
# Lattice does not provide 32-bit binaries anymore.
if sys.platform in ("win32", "cygwin"):
bin_suffix = "nt64"
else:
bin_suffix = "lin64"
return os.path.join(path, str(ver), "bin", bin_suffix)
def _produces_jedec(device):
return device.startswith("LCMX")
def _format_constraint(c):
if isinstance(c, Pins):
return ("LOCATE COMP ", " SITE " + "\"" + c.identifiers[0] + "\"")
elif isinstance(c, IOStandard):
return ("IOBUF PORT ", " IO_TYPE=" + c.name)
elif isinstance(c, Misc):
return ("IOBUF PORT ", " " + c.misc)
def _format_lpf(signame, pin, others, resname):
fmt_c = [_format_constraint(c) for c in ([Pins(pin)] + others)]
r = ""
for pre, suf in fmt_c:
r += pre + "\"" + signame + "\"" + suf + ";\n"
return r
def _build_lpf(named_sc, named_pc):
r = "BLOCK RESETPATHS;\n"
r += "BLOCK ASYNCPATHS;\n"
for sig, pins, others, resname in named_sc:
if len(pins) > 1:
for i, p in enumerate(pins):
r += _format_lpf(sig + "[" + str(i) + "]", p, others, resname)
else:
r += _format_lpf(sig, pins[0], others, resname)
if named_pc:
r += "\n" + "\n\n".join(named_pc)
return r
def _build_files(device, sources, vincpaths, build_name):
tcl = []
tcl.append("prj_project new -name \"{}\" -impl \"impl\" -dev {} -synthesis \"synplify\"".format(build_name, device))
for path in vincpaths:
tcl.append("prj_impl option {include path} {\"" + path + "\"}")
for filename, language, library in sources:
tcl.append("prj_src add \"" + filename + "\" -work " + library)
tcl.append("prj_impl option top \"{}\"".format(build_name))
tcl.append("prj_project save")
tcl.append("prj_run Synthesis -impl impl -forceOne")
tcl.append("prj_run Translate -impl impl")
tcl.append("prj_run Map -impl impl")
tcl.append("prj_run PAR -impl impl")
tcl.append("prj_run Export -impl impl -task Bitgen")
if _produces_jedec(device):
tcl.append("prj_run Export -impl impl -task Jedecgen")
tools.write_to_file(build_name + ".tcl", "\n".join(tcl))
def _build_script(build_name, device, toolchain_path, source, ver=None):
if sys.platform in ("win32", "cygwin"):
script_ext = ".bat"
build_script_contents = "@echo off\nrem Autogenerated by Migen\n\n"
copy_stmt = "copy"
fail_stmt = " || exit /b"
else:
script_ext = ".sh"
build_script_contents = "# Autogenerated by Migen\nset -e\n\n"
copy_stmt = "cp"
fail_stmt = ""
bindir = _get_bindir(toolchain_path, ver)
if source:
if sys.platform in ("win32", "cygwin"):
build_script_contents += "set PATH={};%PATH%\n".format(bindir)
else:
build_script_contents += "bindir={}\n".format(bindir)
build_script_contents += ". ${{bindir}}/diamond_env{fail_stmt}\n".format(
fail_stmt=fail_stmt)
build_script_contents += "pnmainc {tcl_script}{fail_stmt}\n".format(
tcl_script=build_name + ".tcl",
fail_stmt=fail_stmt)
for ext in (".bit", ".jed"):
if ext == ".jed" and not _produces_jedec(device):
continue
diamond_product = os.path.join("impl", build_name + "_impl" + ext)
if sys.platform in ("win32", "cygwin"):
# While Windows itself has no problems with forward slashes
# in paths, the COPY command on Windows uses forward slash for
# arguments. MinGW Python 3 may (it is not consistent) create
# paths with forward slashes on Windows, so remove them just in
# case.
diamond_product = diamond_product.replace("/", "\\")
build_script_contents += "{copy_stmt} {diamond_product} {migen_product}" \
"{fail_stmt}\n".format(
copy_stmt=copy_stmt,
fail_stmt=fail_stmt,
diamond_product=diamond_product,
migen_product=build_name + ext)
build_script_file = "build_" + build_name + script_ext
tools.write_to_file(build_script_file, build_script_contents,
force_unix=False)
return build_script_file
def _run_script(script):
if sys.platform in ("win32", "cygwin"):
shell = ["cmd", "/c"]
else:
shell = ["bash"]
if subprocess.call(shell + [script]) != 0:
raise OSError("Subprocess failed")
class LatticeDiamondToolchain:
attr_translate = {
# FIXME: document
"keep": ("syn_keep", "true"),
"no_retiming": ("syn_no_retiming", "true"),
"async_reg": None,
"mr_ff": None,
"mr_false_path": None,
"ars_ff1": None,
"ars_ff2": None,
"ars_false_path": None,
"no_shreg_extract": None
}
special_overrides = common.lattice_ecpx_special_overrides
def build(self, platform, fragment, build_dir="build", build_name="top",
toolchain_path=None, source=True, run=True, ver=None, **kwargs):
if toolchain_path is None:
if sys.platform == "win32":
toolchain_path = "C:\\lscc\\diamond"
elif sys.platform == "cygwin":
toolchain_path = "/cygdrive/c/lscc/diamond"
else:
toolchain_path = "/usr/local/diamond"
os.makedirs(build_dir, exist_ok=True)
cwd = os.getcwd()
os.chdir(build_dir)
if not isinstance(fragment, _Fragment):
fragment = fragment.get_fragment()
platform.finalize(fragment)
v_output = platform.get_verilog(fragment, name=build_name, **kwargs)
named_sc, named_pc = platform.resolve_signals(v_output.ns)
v_file = build_name + ".v"
v_output.write(v_file)
sources = platform.sources | {(v_file, "verilog", "work")}
_build_files(platform.device, sources, platform.verilog_include_paths, build_name)
tools.write_to_file(build_name + ".lpf", _build_lpf(named_sc, named_pc))
script = _build_script(build_name, platform.device, toolchain_path,
source, ver)
if run:
_run_script(script)
os.chdir(cwd)
return v_output.ns
def add_period_constraint(self, platform, clk, period):
# TODO: handle differential clk
platform.add_platform_command("""FREQUENCY PORT "{clk}" {freq} MHz;""".format(freq=str(float(1/period)*1000), clk="{clk}"), clk=clk)