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 = ['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         self.happened = Signal()
  16         for f in self._exc_types:
  17             setattr(self, f, Signal())
  18
  19
  20 class DCacheToLoadStore1Type(RecordObject):
  21     def __init__(self, name=None):
  22         super().__init__(name=name)
  23         self.valid         = Signal()
  24         self.data          = Signal(64)
  25         self.store_done    = Signal()
  26         self.error         = Signal()
  27         self.cache_paradox = Signal()
  28
  29
  30 class DCacheToMMUType(RecordObject):
  31     def __init__(self, name=None):
  32         super().__init__(name=name)
  33         self.stall         = Signal()
  34         self.done          = Signal()
  35         self.err           = Signal()
  36         self.data          = Signal(64)
  37
  38
  39 class Fetch1ToICacheType(RecordObject):
  40     def __init__(self, name=None):
  41         super().__init__(name=name)
  42         self.req           = Signal()
  43         self.virt_mode     = Signal()
  44         self.priv_mode     = Signal()
  45         self.stop_mark     = Signal()
  46         self.sequential    = Signal()
  47         self.nia           = Signal(64)
  48
  49
  50 class ICacheToDecode1Type(RecordObject):
  51     def __init__(self, name=None):
  52         super().__init__(name=name)
  53         self.valid         = Signal()
  54         self.stop_mark     = Signal()
  55         self.fetch_failed  = Signal()
  56         self.nia           = Signal(64)
  57         self.insn          = Signal(32)
  58
  59
  60 class LoadStore1ToDCacheType(RecordObject):
  61     def __init__(self, name=None):
  62         super().__init__(name=name)
  63         self.valid         = Signal()
  64         self.load          = Signal() # this is a load
  65         self.dcbz          = Signal()
  66         self.nc            = Signal()
  67         self.reserve       = Signal()
  68         self.virt_mode     = Signal()
  69         self.priv_mode     = Signal()
  70         self.addr          = Signal(64)
  71         self.data          = Signal(64)
  72         self.byte_sel      = Signal(8)
  73
  74
  75 class LoadStore1ToMMUType(RecordObject):
  76     def __init__(self, name=None):
  77         super().__init__(name=name)
  78         self.valid         = Signal()
  79         self.tlbie         = Signal()
  80         self.slbia         = Signal()
  81         self.mtspr         = Signal()
  82         self.iside         = Signal()
  83         self.load          = Signal()
  84         self.priv          = Signal()
  85         self.sprn          = Signal(10)
  86         self.addr          = Signal(64)
  87         self.rs            = Signal(64)
  88
  89
  90 class MMUToLoadStore1Type(RecordObject):
  91     def __init__(self, name=None):
  92         super().__init__(name=name)
  93         self.done          = Signal()
  94         self.err           = Signal()
  95         self.invalid       = Signal()
  96         self.badtree       = Signal()
  97         self.segerr        = Signal()
  98         self.perm_error    = Signal()
  99         self.rc_error      = Signal()
 100         self.sprval        = Signal(64)
 101
 102
 103 class MMUToDCacheType(RecordObject):
 104     def __init__(self, name=None):
 105         super().__init__(name=name)
 106         self.valid         = Signal()
 107         self.tlbie         = Signal()
 108         self.doall         = Signal()
 109         self.tlbld         = Signal()
 110         self.addr          = Signal(64)
 111         self.pte           = Signal(64)
 112
 113
 114 class MMUToICacheType(RecordObject):
 115     def __init__(self, name=None):
 116         super().__init__(name=name)
 117         self.tlbld         = Signal()
 118         self.tlbie         = Signal()
 119         self.doall         = Signal()
 120         self.addr          = Signal(64)
 121         self.pte           = Signal(64)
 122