src/bsv/peripheral_gen/eint.py

   1 from bsv.peripheral_gen.base import PBase
   2
   3 class eint(PBase):
   4
   5     def slowimport(self):
   6         size = len(self.peripheral.pinspecs)
   7         return "    `define NUM_EINTS %d" % size
   8
   9     def mkslow_peripheral(self, size=0):
  10         size = len(self.peripheral.pinspecs)
  11         return "        Wire#(Bit#(%d)) wr_interrupt <- mkWire();" % size
  12
  13     def axi_slave_name(self, name, ifacenum):
  14         return ''
  15
  16     def axi_slave_idx(self, idx, name, ifacenum):
  17         return ('', 0)
  18
  19     def axi_addr_map(self, name, ifacenum):
  20         return ''
  21
  22     def ifname_tweak(self, pname, typ, txt):
  23         if typ != 'in':
  24             return txt
  25         print "ifnameweak", pname, typ, txt
  26         return "wr_interrupt[{0}] <= ".format(pname)
  27
  28     def mk_pincon(self, name, count):
  29         ret = [PBase.mk_pincon(self, name, count)]
  30         size = len(self.peripheral.pinspecs)
  31         ret.append(eint_pincon_template.format(size))
  32         ret.append("    rule con_%s%d_io_in;" % (name, count))
  33         ret.append("    wr_interrupt <= ({")
  34         for idx, p in enumerate(self.peripheral.pinspecs):
  35             pname = p['name']
  36             sname = self.peripheral.pname(pname).format(count)
  37             ps = "pinmux.peripheral_side.%s" % sname
  38             comma = '' if idx == size - 1 else ','
  39             ret.append("             {0}{1}".format(ps, comma))
  40         ret.append("        });")
  41         ret.append("    endrule")
  42
  43         return '\n'.join(ret)
  44
  45
  46 eint_pincon_template = '''\
  47     // EINT is offset at end of other peripheral interrupts
  48 `ifdef PLIC
  49     for(Integer i=0;i<{0};i=i+ 1)begin
  50       rule connect_int_to_plic(wr_interrupt[i]==1);
  51                 ff_gateway_queue[i+`NUM_SLOW_IRQS].enq(1);
  52                 plic.ifc_external_irq[i+`NUM_SLOW_IRQS].irq_frm_gateway(True);
  53       endrule
  54     end
  55 `endif
  56 '''