gram/core/__init__.py

   1 from nmigen import *
   2
   3 from lambdasoc.periph import Peripheral
   4
   5 from gram.dfii import DFIInjector
   6 from gram.compat import CSRPrefixProxy
   7 from gram.core.controller import ControllerSettings, gramController
   8 from gram.core.crossbar import gramCrossbar
   9
  10 __ALL__ = ["gramCore"]
  11
  12 class gramCore(Peripheral, Elaboratable):
  13     def __init__(self, phy, geom_settings, timing_settings, clk_freq,
  14                        features=frozenset(), **kwargs):
  15         super().__init__("core")
  16
  17         bank = self.csr_bank()
  18
  19         self._phy = phy
  20         self._geom_settings = geom_settings
  21         self._timing_settings = timing_settings
  22         self._clk_freq = clk_freq
  23         self._kwargs = kwargs
  24
  25         self.dfii = DFIInjector(
  26             csr_bank=CSRPrefixProxy(bank, "dfii"),
  27             addressbits=self._geom_settings.addressbits,
  28             bankbits=self._geom_settings.bankbits,
  29             nranks=self._phy.settings.nranks,
  30             databits=self._phy.settings.dfi_databits,
  31             nphases=self._phy.settings.nphases)
  32
  33         self.controller = gramController(
  34             phy_settings=self._phy.settings,
  35             geom_settings=self._geom_settings,
  36             timing_settings=self._timing_settings,
  37             clk_freq=self._clk_freq,
  38             **self._kwargs)
  39
  40         # Size in bytes
  41         self.size = 2**geom_settings.bankbits * 2**geom_settings.rowbits * 2**geom_settings.colbits
  42
  43         self.crossbar = gramCrossbar(self.controller.interface)
  44
  45         self._bridge = self.bridge(data_width=32, granularity=8, alignment=2,
  46                                    features=features)
  47         self.bus = self._bridge.bus
  48
  49     def elaborate(self, platform):
  50         m = Module()
  51
  52         m.submodules.bridge = self._bridge
  53
  54         m.submodules.dfii = self.dfii
  55         m.d.comb += self.dfii.master.connect(self._phy.dfi)
  56
  57         m.submodules.controller = self.controller
  58         m.d.comb += self.controller.dfi.connect(self.dfii.slave)
  59
  60         m.submodules.crossbar = self.crossbar
  61
  62         return m