Adds apicula toolchain to gowin platform
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@ -0,0 +1,46 @@
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from litex.build.generic_platform import *
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from litex.build import tools
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from litex.build.gowin.gowin import _build_cst
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from litex.build.yosys_nextpnr_toolchain import YosysNextPNRToolchain
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class GowinApiculaToolchain(YosysNextPNRToolchain):
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family = "gowin"
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synth_fmt = "json"
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pnr_fmt = "report"
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packer_cmd = "gowin_pack"
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def __init__(self):
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super().__init__()
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self.additional_cst_commands = []
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def build_timing_constraints(self, vns):
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# nextpnr-himbaechel for gowin currently doesnt supports timing constaints
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pass
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def build_io_constraints(self):
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_build_cst(self.named_sc, self.named_pc, self.additional_cst_commands, self._build_name)
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return (self._build_name + ".cst", "CST")
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def finalize(self):
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pnr_opts = "--write {top}_routed.json --top {top} --device {device}" + \
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" --vopt family={devicename} --vopt cst={top}.cst"
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self._pnr_opts += pnr_opts.format(
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top = self._build_name,
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device = self.platform.device,
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devicename = self.platform.devicename
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)
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self._packer_opts += "-d {devicename} -o {top}.fs {top}_routed.json".format(
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devicename = self.platform.devicename,
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top = self._build_name
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)
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YosysNextPNRToolchain.finalize(self)
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# family is gowin but NextPNRWrapper needs to call 'nextpnr-himbaechel' not 'nextpnr-gowin'
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self._nextpnr.name = "nextpnr-himbaechel"
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def build(self, platform, fragment, **kwargs):
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self.platform = platform
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return YosysNextPNRToolchain.build(self, platform, fragment, **kwargs)
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@ -17,6 +17,61 @@ from litex.build.generic_toolchain import GenericToolchain
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from litex.build.generic_platform import *
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from litex.build import tools
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# Constraints (.cst) -------------------------------------------------------------------------------
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def _build_cst(named_sc, named_pc, additional_cst_commands, build_name):
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cst = []
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flat_sc = []
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for name, pins, other, resource in named_sc:
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if len(pins) > 1:
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for i, p in enumerate(pins):
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flat_sc.append((f"{name}[{i}]", p, other))
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else:
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flat_sc.append((name, pins[0], other))
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def _search_pin_entry(pin_lst, pin_name):
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for name, pin, other in pin_lst:
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if pin_name == name:
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return (name, pin, other)
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return (None, None, None)
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for name, pin, other in flat_sc:
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if pin != "X":
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t_name = name.split('[') # avoid index pins
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tmp_name = t_name[0]
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if tmp_name[-2:] == "_p":
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pn = tmp_name[:-2] + "_n"
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if len(t_name) > 1:
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pn += '[' + t_name[1]
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(_, n_pin, _) = _search_pin_entry(flat_sc, pn)
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if n_pin is not None:
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pin = f"{pin},{n_pin}"
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elif tmp_name[-2:] == "_n":
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pp = tmp_name[:-2] + "_p"
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if len(t_name) > 1:
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pp += '[' + t_name[1]
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(p_name, _, _) = _search_pin_entry(flat_sc, pp)
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if p_name is not None:
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continue
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cst.append(f"IO_LOC \"{name}\" {pin};")
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other_cst = []
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for c in other:
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if isinstance(c, IOStandard):
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other_cst.append(f"IO_TYPE={c.name}")
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elif isinstance(c, Misc):
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other_cst.append(f"{c.misc}")
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if len(other_cst):
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t = " ".join(other_cst)
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cst.append(f"IO_PORT \"{name}\" {t};")
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if named_pc:
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cst.extend(named_pc)
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cst.extend(additional_cst_commands)
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tools.write_to_file(build_name + ".cst", "\n".join(cst))
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# GowinToolchain -----------------------------------------------------------------------------------
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@ -60,58 +115,7 @@ class GowinToolchain(GenericToolchain):
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# Constraints (.cst ) --------------------------------------------------------------------------
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def build_io_constraints(self):
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cst = []
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flat_sc = []
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for name, pins, other, resource in self.named_sc:
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if len(pins) > 1:
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for i, p in enumerate(pins):
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flat_sc.append((f"{name}[{i}]", p, other))
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else:
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flat_sc.append((name, pins[0], other))
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def _search_pin_entry(pin_lst, pin_name):
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for name, pin, other in pin_lst:
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if pin_name == name:
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return (name, pin, other)
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return (None, None, None)
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for name, pin, other in flat_sc:
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if pin != "X":
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t_name = name.split('[') # avoid index pins
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tmp_name = t_name[0]
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if tmp_name[-2:] == "_p":
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pn = tmp_name[:-2] + "_n"
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if len(t_name) > 1:
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pn += '[' + t_name[1]
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(_, n_pin, _) = _search_pin_entry(flat_sc, pn)
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if n_pin is not None:
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pin = f"{pin},{n_pin}"
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elif tmp_name[-2:] == "_n":
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pp = tmp_name[:-2] + "_p"
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if len(t_name) > 1:
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pp += '[' + t_name[1]
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(p_name, _, _) = _search_pin_entry(flat_sc, pp)
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if p_name is not None:
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continue
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cst.append(f"IO_LOC \"{name}\" {pin};")
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other_cst = []
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for c in other:
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if isinstance(c, IOStandard):
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other_cst.append(f"IO_TYPE={c.name}")
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elif isinstance(c, Misc):
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other_cst.append(f"{c.misc}")
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if len(other_cst):
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t = " ".join(other_cst)
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cst.append(f"IO_PORT \"{name}\" {t};")
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if self.named_pc:
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cst.extend(self.named_pc)
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cst.extend(self.additional_cst_commands)
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tools.write_to_file(f"{self._build_name}.cst", "\n".join(cst))
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_build_cst(self.named_sc, self.named_pc, self.additional_cst_commands, self._build_name)
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return (f"{self._build_name}.cst", "CST")
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# Timing Constraints (.sdc ) -------------------------------------------------------------------
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@ -8,7 +8,7 @@
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import os
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from litex.build.generic_platform import GenericPlatform
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from litex.build.gowin import common, gowin
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from litex.build.gowin import common, gowin, apicula
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# GowinPlatform ------------------------------------------------------------------------------------
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if toolchain == "gowin":
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self.toolchain = gowin.GowinToolchain()
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elif toolchain == "apicula":
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raise ValueError("Apicula toolchain needs more work")
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self.toolchain = apicula.GowinApiculaToolchain()
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else:
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raise ValueError(f"Unknown toolchain {toolchain}")
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@ -83,9 +83,10 @@ class NextPNRWrapper():
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=======
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str containing instruction and/or rule
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"""
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cmd = "{pnr_name} --{in_fmt} {build_name}.{in_fmt} --{constr_fmt}" + \
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" {build_name}.{constr_fmt}" + \
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" --{out_fmt} {build_name}.{out_ext} {pnr_opts}"
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cmd = "{pnr_name} --{in_fmt} {build_name}.{in_fmt}"
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if self._constr_format != "":
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cmd += " --{constr_fmt} {build_name}.{constr_fmt}"
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cmd += " --{out_fmt} {build_name}.{out_ext} {pnr_opts}"
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base_cmd = cmd.format(
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pnr_name = self.name,
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build_name = self._build_name,
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