src/soc/experiment/mem_types.py

   1 """mem_types
   2
   3 based on Anton Blanchard microwatt common.vhdl
   4
   5 """
   6 from nmutil.iocontrol import RecordObject
   7 from nmigen import Signal
   8
   9 # https://bugs.libre-soc.org/show_bug.cgi?id=465
  10 class LDSTException(RecordObject):
  11     _exc_types = ['happened', 'alignment', 'instr_fault', 'invalid', 'badtree',
  12                  'perm_error', 'rc_error', 'segment_fault',]
  13     def __init__(self, name=None):
  14         RecordObject.__init__(self, name=name)
  15         for f in self._exc_types:
  16             setattr(self, f, Signal())
  17
  18
  19 class DCacheToLoadStore1Type(RecordObject):
  20     def __init__(self, name=None):
  21         super().__init__(name=name)
  22         self.valid         = Signal()
  23         self.data          = Signal(64)
  24         self.store_done    = Signal()
  25         self.error         = Signal()
  26         self.cache_paradox = Signal()
  27
  28
  29 class DCacheToMMUType(RecordObject):
  30     def __init__(self, name=None):
  31         super().__init__(name=name)
  32         self.stall         = Signal()
  33         self.done          = Signal()
  34         self.err           = Signal()
  35         self.data          = Signal(64)
  36
  37
  38 class Fetch1ToICacheType(RecordObject):
  39     def __init__(self, name=None):
  40         super().__init__(name=name)
  41         self.req           = Signal()
  42         self.virt_mode     = Signal()
  43         self.priv_mode     = Signal()
  44         self.stop_mark     = Signal()
  45         self.sequential    = Signal()
  46         self.nia           = Signal(64)
  47
  48
  49 class ICacheToDecode1Type(RecordObject):
  50     def __init__(self, name=None):
  51         super().__init__(name=name)
  52         self.valid         = Signal()
  53         self.stop_mark     = Signal()
  54         self.fetch_failed  = Signal()
  55         self.nia           = Signal(64)
  56         self.insn          = Signal(32)
  57
  58
  59 class LoadStore1ToDCacheType(RecordObject):
  60     def __init__(self, name=None):
  61         super().__init__(name=name)
  62         self.valid         = Signal()
  63         self.load          = Signal() # this is a load
  64         self.dcbz          = Signal()
  65         self.nc            = Signal()
  66         self.reserve       = Signal()
  67         self.virt_mode     = Signal()
  68         self.priv_mode     = Signal()
  69         self.addr          = Signal(64)
  70         self.data          = Signal(64)
  71         self.byte_sel      = Signal(8)
  72
  73
  74 class LoadStore1ToMMUType(RecordObject):
  75     def __init__(self, name=None):
  76         super().__init__(name=name)
  77         self.valid         = Signal()
  78         self.tlbie         = Signal()
  79         self.slbia         = Signal()
  80         self.mtspr         = Signal()
  81         self.iside         = Signal()
  82         self.load          = Signal()
  83         self.priv          = Signal()
  84         self.sprn          = Signal(10)
  85         self.addr          = Signal(64)
  86         self.rs            = Signal(64)
  87
  88
  89 class MMUToLoadStore1Type(RecordObject):
  90     def __init__(self, name=None):
  91         super().__init__(name=name)
  92         self.done          = Signal()
  93         self.err           = Signal()
  94         self.invalid       = Signal()
  95         self.badtree       = Signal()
  96         self.segerr        = Signal()
  97         self.perm_error    = Signal()
  98         self.rc_error      = Signal()
  99         self.sprval        = Signal(64)
 100
 101
 102 class MMUToDCacheType(RecordObject):
 103     def __init__(self, name=None):
 104         super().__init__(name=name)
 105         self.valid         = Signal()
 106         self.tlbie         = Signal()
 107         self.doall         = Signal()
 108         self.tlbld         = Signal()
 109         self.addr          = Signal(64)
 110         self.pte           = Signal(64)
 111
 112
 113 class MMUToICacheType(RecordObject):
 114     def __init__(self, name=None):
 115         super().__init__(name=name)
 116         self.tlbld         = Signal()
 117         self.tlbie         = Signal()
 118         self.doall         = Signal()
 119         self.addr          = Signal(64)
 120         self.pte           = Signal(64)
 121