# Yosys/Nextpnr Helpers/Templates ------------------------------------------------------------------
_yosys_template = [
+ "verilog_defaults -push",
+ "verilog_defaults -add -defer",
"{read_files}",
+ "verilog_defaults -pop",
"attrmap -tocase keep -imap keep=\"true\" keep=1 -imap keep=\"false\" keep=0 -remove keep=0",
"synth_ecp5 -abc9 {nwl} -json {build_name}.json -top {build_name}",
]
))
tools.write_to_file(build_name + ".ys", "\n".join(ys))
+def nextpnr_ecp5_parse_device(device):
+ device = device.lower()
+ family = device.split("-")[0]
+ size = device.split("-")[1]
+ speed_grade = device.split("-")[2][0]
+ if speed_grade not in ["6", "7", "8"]:
+ raise ValueError("Invalid speed grade {}".format(speed_grade))
+ package = device.split("-")[2][1:]
+ if "256" in package:
+ package = "CABGA256"
+ elif "285" in package:
+ package = "CSFBGA285"
+ elif "381" in package:
+ package = "CABGA381"
+ elif "554" in package:
+ package = "CABGA554"
+ elif "756" in package:
+ package = "CABGA756"
+ else:
+ raise ValueError("Invalid package {}".format(package))
+ return (family, size, speed_grade, package)
+
nextpnr_ecp5_architectures = {
+ "lfe5u-12f" : "12k",
"lfe5u-25f" : "25k",
"lfe5u-45f" : "45k",
"lfe5u-85f" : "85k",
"lfe5um5g-85f": "um5g-85k",
}
-def nextpnr_ecp5_package(package):
- if "256" in package:
- return "CABGA256"
- elif "285" in package:
- return "CSFBGA285"
- elif "381" in package:
- return "CABGA381"
- elif "554" in package:
- return "CABGA554"
- elif "756" in package:
- return "CABGA756"
- raise ValueError("Unknown package {}".format(package))
-
# Script -------------------------------------------------------------------------------------------
_build_template = [
- "yosys -q -l {build_name}.rpt {build_name}.ys",
+ "yosys -l {build_name}.rpt {build_name}.ys",
"nextpnr-ecp5 --json {build_name}.json --lpf {build_name}.lpf --textcfg {build_name}.config \
- --{architecture} --package {package} --freq {freq_constraint} {timefailarg}",
- "ecppack {build_name}.config --svf {build_name}.svf --bit {build_name}.bit"
+ --{architecture} --package {package} --speed {speed_grade} {timefailarg} {ignoreloops} --seed {seed}",
+ "ecppack {build_name}.config --svf {build_name}.svf --bit {build_name}.bit --bootaddr {bootaddr} --spimode {spimode}"
]
-def _build_script(source, build_template, build_name, architecture, package, freq_constraint, timingstrict):
+def _build_script(source, build_template, build_name, architecture, package, speed_grade, timingstrict, ignoreloops, bootaddr, seed, spimode):
if sys.platform in ("win32", "cygwin"):
script_ext = ".bat"
script_contents = "@echo off\nrem Autogenerated by LiteX / git: " + tools.get_litex_git_revision() + "\n\n"
build_name = build_name,
architecture = architecture,
package = package,
- freq_constraint = freq_constraint,
+ speed_grade = speed_grade,
timefailarg = "--timing-allow-fail" if not timingstrict else "",
- fail_stmt = fail_stmt)
+ ignoreloops = "--ignore-loops" if ignoreloops else "",
+ bootaddr = bootaddr,
+ fail_stmt = fail_stmt,
+ seed = seed,
+ spimode = spimode)
script_file = "build_" + build_name + script_ext
tools.write_to_file(script_file, script_contents, force_unix=False)
"no_shreg_extract": None
}
- special_overrides = common.lattice_ecpx_trellis_special_overrides
+ special_overrides = common.lattice_ecp5_trellis_special_overrides
def __init__(self):
self.yosys_template = _yosys_template
self.build_template = _build_template
- self.freq_constraints = dict()
+ self.false_paths = set() # FIXME: use it
def build(self, platform, fragment,
build_dir = "build",
build_name = "top",
- toolchain_path = None,
run = True,
nowidelut = False,
timingstrict = False,
+ ignoreloops = False,
+ bootaddr = 0,
+ seed = 1,
+ spimode = "fast-read",
**kwargs):
- # Get default toolchain path (if not specified)
- if toolchain_path is None:
- toolchain_path = "/usr/share/trellis/"
-
# Create build directory
os.makedirs(build_dir, exist_ok=True)
cwd = os.getcwd()
fragment = fragment.get_fragment()
platform.finalize(fragment)
- # Generate verilog
+ # Generate verilog
v_output = platform.get_verilog(fragment, name=build_name, **kwargs)
named_sc, named_pc = platform.resolve_signals(v_output.ns)
top_file = build_name + ".v"
# Generate Yosys script
_build_yosys(self.yosys_template, platform, nowidelut, build_name)
- # Translate device to Nextpnr architecture/package
- (family, size, package) = platform.device.split("-")
- architecture = nextpnr_ecp5_architectures[(family + "-" + size).lower()]
- package = nextpnr_ecp5_package(package)
-
- freq_constraint = str(max(self.freq_constraints.values(), default=0.0))
+ # Translate device to Nextpnr architecture/package/speed_grade
+ (family, size, speed_grade, package) = nextpnr_ecp5_parse_device(platform.device)
+ architecture = nextpnr_ecp5_architectures[(family + "-" + size)]
# Generate build script
script = _build_script(False, self.build_template, build_name, architecture, package,
- freq_constraint, timingstrict)
-
+ speed_grade, timingstrict, ignoreloops, bootaddr, seed, spimode)
# Run
if run:
_run_script(script)
return v_output.ns
- # Until nextpnr-ecp5 can handle multiple clock domains, use the same
- # approach as the icestorm and use the fastest clock for timing
- # constraints.
def add_period_constraint(self, platform, clk, period):
platform.add_platform_command("""FREQUENCY PORT "{clk}" {freq} MHz;""".format(
freq=str(float(1/period)*1000), clk="{clk}"), clk=clk)
+ def add_false_path_constraint(self, platform, from_, to):
+ from_.attr.add("keep")
+ to.attr.add("keep")
+ if (to, from_) not in self.false_paths:
+ self.false_paths.add((from_, to))
+
def trellis_args(parser):
parser.add_argument("--yosys-nowidelut", action="store_true",
help="pass '-nowidelut' to yosys synth_ecp5")
parser.add_argument("--nextpnr-timingstrict", action="store_true",
help="fail if timing not met, i.e., do NOT pass '--timing-allow-fail' to nextpnr")
+ parser.add_argument("--nextpnr-ignoreloops", action="store_true",
+ help="ignore combinational loops in timing analysis, i.e. pass '--ignore-loops' to nextpnr")
+ parser.add_argument("--ecppack-bootaddr", default=0,
+ help="Set boot address for next image, i.e. pass '--bootaddr xxx' to ecppack")
+ parser.add_argument("--ecppack-spimode", default="fast-read",
+ help="Set slave SPI programming mode")
+ parser.add_argument("--nextpnr-seed", default=1, type=int,
+ help="seed to pass to nextpnr")
def trellis_argdict(args):
return {
"nowidelut": args.yosys_nowidelut,
"timingstrict": args.nextpnr_timingstrict,
+ "ignoreloops": args.nextpnr_ignoreloops,
+ "bootaddr": args.ecppack_bootaddr,
+ "spimode": args.ecppack_spimode,
+ "seed": args.nextpnr_seed,
}
projects / litex.git / blobdiff