src/bsv/peripheral_gen/flexbus.py

   1 from bsv.peripheral_gen.base import PBase
   2
   3
   4 class flexbus(PBase):
   5
   6     def slowimport(self):
   7         return "import FlexBus_Types::*;"
   8
   9     def num_axi_regs32(self):
  10         return 0x400000  # defines an entire memory range
  11
  12     def extfastifinstance(self, name, count):
  13         return self._extifinstance(name, count, "_out", "", True,
  14                                    ".flexbus_side")
  15
  16     def fastifdecl(self, name, count):
  17         return "interface FlexBus_Master_IFC fb{0}_out;".format(count)
  18
  19     def mkfast_peripheral(self):
  20         return "AXI4_Slave_to_FlexBus_Master_Xactor_IFC " + \
  21                "#(`PADDR, `DATA, `USERSPACE)\n" + \
  22                "        fb{0} <- mkAXI4_Slave_to_FlexBus_Master_Xactor;"
  23
  24     def _mk_connection(self, name=None, count=0):
  25         return "fb{0}.axi_side"
  26
  27     def pinname_in(self, pname):
  28         return {'ta': 'flexbus_side.m_tAn',
  29                 }.get(pname, '')
  30
  31     def pinname_out(self, pname):
  32         return {'ale': 'flexbus_side.m_ALE',
  33                 'oe': 'flexbus_side.m_OEn',
  34                 'rw': 'flexbus_side.m_R_Wn',
  35                 }.get(pname, '')
  36
  37     def _mk_pincon(self, name, count, typ):
  38         ret = [PBase._mk_pincon(self, name, count, typ)]
  39         # special-case for gpio in, store in a temporary vector
  40         plen = len(self.peripheral.pinspecs)
  41         template = "mkConnection({0}.{3},\n\t\t\t{2}.flexbus_side.{1});"
  42         sname = self.get_iname(count)
  43         # SLOW -->sname = self.peripheral.iname().format(count)
  44         name = self.get_iname(count)
  45         assert typ == 'fast' # TODO slow?
  46         ps = "slow_peripherals.%s" % sname
  47         n = "{0}".format(name)
  48         for stype, ptype in [
  49             ('cs', 'm_FBCSn'),
  50             ('bwe', 'm_BWEn'),
  51             ('tbst', 'm_TBSTn'),
  52             ('tsiz', 'm_TSIZ'),
  53             ('ad_out', 'm_AD'),
  54             ('ad_in', 'm_din'),
  55             ('ad_out_en', 'm_OE32n'),
  56         ]:
  57             ret.append(template.format(ps, ptype, n, stype))
  58         return '\n'.join(ret)