src/soc/fu/trap/pipe_data.py

   1 from soc.fu.pipe_data import FUBaseData, CommonPipeSpec
   2 from soc.fu.trap.trap_input_record import CompTrapOpSubset
   3
   4
   5 class TrapInputData(FUBaseData):
   6     regspec = [('INT', 'ra', '0:63'),  # RA
   7                ('INT', 'rb', '0:63'),  # RB/immediate
   8                ('FAST', 'fast1', '0:63'), # SRR0
   9                ('FAST', 'fast2', '0:63'), # SRR1
  10                ('FAST', 'fast3', '0:63'), # SVSRR0
  11                 # note here that MSR CIA and SVSTATE are *not* read as regs:
  12                 # they are passed in as incoming "State", via the
  13                 # CompTrapOpSubset
  14                ]
  15     def __init__(self, pspec):
  16         super().__init__(pspec, False)
  17         # convenience
  18         self.srr0, self.srr1, self.svsrr0 = self.fast1, self.fast2, self.fast3
  19         self.a, self.b = self.ra, self.rb
  20
  21
  22 class TrapOutputData(FUBaseData):
  23     regspec = [('INT', 'o', '0:63'),     # RA
  24                ('FAST', 'fast1', '0:63'), # SRR0 SPR
  25                ('FAST', 'fast2', '0:63'), # SRR1 SPR
  26                ('FAST', 'fast3', '0:63'), # SRR2 SPR
  27                # ... however we *do* need to *write* MSR, NIA, SVSTATE (RFID)
  28                ('STATE', 'nia', '0:63'),  # NIA (Next PC)
  29                ('STATE', 'msr', '0:63'),  # MSR
  30                ('STATE', 'svstate', '0:63')]  # SVSTATE
  31     def __init__(self, pspec):
  32         super().__init__(pspec, True)
  33         # convenience
  34         self.srr0, self.srr1, self.svsrr0 = self.fast1, self.fast2, self.fast3
  35
  36
  37
  38 class TrapPipeSpec(CommonPipeSpec):
  39     regspecklses = (TrapInputData, TrapOutputData)
  40     opsubsetkls = CompTrapOpSubset