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 neither MSR nor CIA are read as regs: they are
  12                 # passed in as incoming "State", via the CompTrapOpSubset
  13                ]
  14     def __init__(self, pspec):
  15         super().__init__(pspec, False)
  16         # convenience
  17         self.srr0, self.srr1, self.svsrr0 = self.fast1, self.fast2, self.fast3
  18         self.a, self.b = self.ra, self.rb
  19
  20
  21 class TrapOutputData(FUBaseData):
  22     regspec = [('INT', 'o', '0:63'),     # RA
  23                ('FAST', 'fast1', '0:63'), # SRR0 SPR
  24                ('FAST', 'fast2', '0:63'), # SRR1 SPR
  25                ('FAST', 'fast3', '0:63'), # SRR2 SPR
  26                ('STATE', 'nia', '0:63'),  # NIA (Next PC)
  27                ('STATE', 'msr', '0:63')]  # MSR
  28     def __init__(self, pspec):
  29         super().__init__(pspec, True)
  30         # convenience
  31         self.srr0, self.srr1, self.svsrr0 = self.fast1, self.fast2, self.fast3
  32
  33
  34
  35 class TrapPipeSpec(CommonPipeSpec):
  36     regspec = (TrapInputData.regspec, TrapOutputData.regspec)
  37     opsubsetkls = CompTrapOpSubset