ls180/post_pnr/vst_correct.py

   1 #!/usr/bin/env python3
   2
   3 """makes corrections to vst source from coriolis2 P&R
   4 """
   5
   6 import os
   7 import sys
   8
   9 vhdl_header = """\
  10 LIBRARY IEEE;
  11 USE IEEE.std_logic_1164.ALL;
  12 USE IEEE.numeric_std.ALL;
  13
  14 """
  15 # run through all files
  16 for fname in os.listdir("vst_src"):
  17     if not fname.endswith(".vst"):
  18         continue
  19     print (fname)
  20     is_chip = fname.startswith("chip")
  21     # read the file
  22     fname = "vst_src/"+fname
  23     with open(fname) as f:
  24         txt = f.read()
  25     # replace vss / vdd : linkage bit with vss/vdd in bit
  26     txt = txt.replace("linkage bit", "in bit")
  27     # and double-underscores
  28     txt = txt.replace("__", "_")
  29     # special-case for chip.vst and chip_r.vst
  30     if is_chip:
  31         # add VHDL IEEE Library header
  32         txt = vhdl_header + txt
  33         # pad gpio fix
  34         txt = txt.replace("pad   : inout mux_bit bus",
  35                           "pad   : inout std_logic")
  36         # reset fix
  37         txt = txt.replace("sys_rst : gpio",
  38                           "p_sys_rst: gpio")
  39
  40         # corona instance needs renaming too
  41         txt = txt.replace("corona : corona", "instance_corona : corona")
  42
  43         # temporary hack to rename niolib to avoid name-clashes
  44         for cell in ['gpio', 'vss', 'vdd', 'iovss', 'iovdd']:
  45             txt = txt.replace(": %s" % cell, ": cmpt_%s" % cell)
  46             txt = txt.replace("component %s" % cell, "component cmpt_%s" % cell)
  47         # identify the chip ports and replace "in bit" with "inout std_logic"
  48         res = []
  49         found_chip = False
  50         done_chip = False
  51         for line in txt.splitlines():
  52             if done_chip:
  53                 res.append(line)
  54                 continue
  55             if not found_chip:
  56                 if line.startswith("entity chip"):
  57                     found_chip = True
  58             else:
  59                 # covers in bit_vector and out bit_vector as well
  60                 line = line.replace("in bit", "inout std_logic")
  61                 line = line.replace("out bit", "inout std_logic")
  62                 done_chip = line.startswith("end chip")
  63             res.append(line)
  64         # re-join lines
  65         txt = '\n'.join(res)
  66         # easier to just post-process-correct the iovdd std_logic
  67         for port in ['vss', 'vdd', 'iovss', 'iovdd']:
  68             txt = txt.replace("%-9s: inout std_logic" % port,
  69                               "%-9s: in bit" % port)
  70
  71
  72     # write the file
  73     with open(fname, "w") as f:
  74         f.write(txt)