src/soc/fu/mmu/test/test_non_production_core.py

   1 from nmigen import Module, Signal
   2
   3 # NOTE: to use cxxsim, export NMIGEN_SIM_MODE=cxxsim from the shell
   4 # Also, check out the cxxsim nmigen branch, and latest yosys from git
   5 from nmutil.sim_tmp_alternative import Simulator, Settle
   6
   7 from nmigen.cli import rtlil
   8 import unittest
   9 from soc.decoder.isa.caller import ISACaller, special_sprs
  10 from soc.decoder.power_decoder import (create_pdecode)
  11 from soc.decoder.power_decoder2 import (PowerDecode2)
  12 from soc.decoder.power_enums import (XER_bits, Function, MicrOp, CryIn)
  13 from soc.decoder.selectable_int import SelectableInt
  14 from soc.simulator.program import Program
  15 from soc.decoder.isa.all import ISA
  16 from soc.config.endian import bigendian
  17 from soc.consts import MSR
  18
  19
  20 from soc.fu.test.common import (
  21     TestAccumulatorBase, skip_case, TestCase, ALUHelpers)
  22 #from soc.fu.spr.pipeline import SPRBasePipe
  23 #from soc.fu.spr.pipe_data import SPRPipeSpec
  24 #from soc.fu.mmu.fsm import FSMMMUStage
  25 #from soc.fu.mmu.pipe_data import MMUPipeSpec
  26 import random
  27
  28 from soc.fu.div.test.helper import (log_rand, get_cu_inputs,
  29                                     set_alu_inputs, DivTestHelper)
  30
  31 from soc.simple.core import NonProductionCore
  32 from soc.config.test.test_loadstore import TestMemPspec
  33 from soc.simple.test.test_core import (setup_regs, check_regs,
  34                                        wait_for_busy_clear,
  35                                        wait_for_busy_hi)
  36
  37 import power_instruction_analyzer as pia
  38
  39 debughang = 2
  40
  41 def set_fsm_inputs_do_not_use(alu, dec2, sim):
  42     # TODO: see https://bugs.libre-soc.org/show_bug.cgi?id=305#c43
  43     # detect the immediate here (with m.If(self.i.ctx.op.imm_data.imm_ok))
  44     # and place it into data_i.b
  45
  46     print("Error here")
  47     inp = yield from get_cu_inputs(dec2, sim)
  48     # set int registers a and b
  49     yield from ALUHelpers.set_int_ra(alu, dec2, inp)
  50     yield from ALUHelpers.set_int_rb(alu, dec2, inp)
  51     # TODO set spr register
  52     # yield from ALUHelpers.set_spr_spr1(alu, dec2, inp)
  53
  54     overflow = None
  55     a=None
  56     b=None
  57     # TODO
  58     if 'xer_so' in inp:
  59         print("xer_so::::::::::::::::::::::::::::::::::::::::::::::::")
  60         so = inp['xer_so']
  61         print(so)
  62         overflow = pia.OverflowFlags(so=bool(so),
  63                                       ov=False,
  64                                       ov32=False)
  65     if 'ra' in inp:
  66         a = inp['ra']
  67     if 'rb' in inp:
  68         b = inp['rb']
  69     print(inp)
  70     return pia.InstructionInput(ra=a, rb=b, overflow=overflow)
  71
  72 class MMUTestCase(TestAccumulatorBase):
  73     # MMU handles MTSPR, MFSPR, DCBZ and TLBIE.
  74     # other instructions here -> must be load/store
  75
  76     #before running the test case: set DISR and DAR
  77
  78     def case_mfspr_after_invalid_load(self):
  79         lst = [ # TODO -- set SPR on both sinulator and port interface
  80                 "mfspr 1, 18", # DSISR to reg 1
  81                 "mfspr 2, 19", # DAR to reg 2
  82                 # TODO -- verify returned sprvals
  83               ]
  84
  85         initial_regs = [0] * 32
  86
  87         #initial_sprs = {'DSISR': 0x12345678, 'DAR': 0x87654321}
  88         initial_sprs = {}
  89         self.add_case(Program(lst, bigendian),
  90                       initial_regs, initial_sprs)
  91
  92     #def case_ilang(self):
  93     #    pspec = SPRPipeSpec(id_wid=2)
  94     #    alu = SPRBasePipe(pspec)
  95     #    vl = rtlil.convert(alu, ports=alu.ports())
  96     #    with open("trap_pipeline.il", "w") as f:
  97     #        f.write(vl)
  98
  99
 100 class TestRunner(unittest.TestCase):
 101     def __init__(self, test_data):
 102         super().__init__("run_all")
 103         self.test_data = test_data
 104
 105     def check_fsm_outputs_delete_me(self, alu, dec2, sim, code, pia_res):
 106
 107         rc = yield dec2.e.do.rc.data
 108         cridx_ok = yield dec2.e.write_cr.ok
 109         cridx = yield dec2.e.write_cr.data
 110
 111         print("check extra output", repr(code), cridx_ok, cridx)
 112         if rc:
 113             self.assertEqual(cridx, 0, code)
 114
 115         sim_o = {}
 116         res = {}
 117
 118         #MMUOutputData does not have xer
 119
 120         yield from ALUHelpers.get_cr_a(res, alu, dec2)
 121         #yield from ALUHelpers.get_xer_ov(res, alu, dec2)
 122         yield from ALUHelpers.get_int_o(res, alu, dec2)
 123         #yield from ALUHelpers.get_xer_so(res, alu, dec2)
 124
 125
 126         print("res output", res)
 127
 128         yield from ALUHelpers.get_sim_int_o(sim_o, sim, dec2)
 129         yield from ALUHelpers.get_wr_sim_cr_a(sim_o, sim, dec2)
 130         #yield from ALUHelpers.get_sim_xer_ov(sim_o, sim, dec2)
 131         #yield from ALUHelpers.get_sim_xer_so(sim_o, sim, dec2)
 132
 133         print("sim output", sim_o)
 134
 135         print("power-instruction-analyzer result:")
 136         print(pia_res)
 137         #if pia_res is not None:
 138         #    with self.subTest(check="pia", sim_o=sim_o, pia_res=str(pia_res)):
 139         #        pia_o = pia_res_to_output(pia_res)
 140         #        ALUHelpers.check_int_o(self, res, pia_o, code)
 141         #        ALUHelpers.check_cr_a(self, res, pia_o, code)
 142         #        #ALUHelpers.check_xer_ov(self, res, pia_o, code)
 143         #        #ALUHelpers.check_xer_so(self, res, pia_o, code)
 144
 145         with self.subTest(check="sim", sim_o=sim_o, pia_res=str(pia_res)):
 146             #ALUHelpers.check_int_o(self, res, sim_o, code) # mmu is not an alu
 147             ALUHelpers.check_cr_a(self, res, sim_o, code)
 148             #ALUHelpers.check_xer_ov(self, res, sim_o, code)
 149             #ALUHelpers.check_xer_so(self, res, sim_o, code)
 150
 151         #oe = yield dec2.e.do.oe.oe
 152         #oe_ok = yield dec2.e.do.oe.ok
 153         #print("oe, oe_ok", oe, oe_ok)
 154         #if not oe or not oe_ok:
 155         #    # if OE not enabled, XER SO and OV must not be activated
 156         #    so_ok = yield alu.n.data_o.xer_so.ok
 157         #    ov_ok = yield alu.n.data_o.xer_ov.ok
 158         #    print("so, ov", so_ok, ov_ok)
 159         #    self.assertEqual(ov_ok, False, code)
 160         #    self.assertEqual(so_ok, False, code)
 161
 162     def execute(self, core, instruction, pdecode2, test):
 163         program = test.program
 164         sim = ISA(pdecode2, test.regs, test.sprs, test.cr,
 165                   test.mem, test.msr,
 166                   bigendian=bigendian)
 167         gen = program.generate_instructions()
 168         instructions = list(zip(gen, program.assembly.splitlines()))
 169
 170         pc = sim.pc.CIA.value
 171         msr = sim.msr.value
 172         index = pc//4
 173         while index < len(instructions):
 174             ins, code = instructions[index]
 175
 176             print("pc %08x instr: %08x" % (pc, ins & 0xffffffff))
 177             print(code)
 178
 179             if 'XER' in sim.spr:
 180                 so = 1 if sim.spr['XER'][XER_bits['SO']] else 0
 181                 ov = 1 if sim.spr['XER'][XER_bits['OV']] else 0
 182                 ov32 = 1 if sim.spr['XER'][XER_bits['OV32']] else 0
 183                 print("before: so/ov/32", so, ov, ov32)
 184
 185             # ask the decoder to decode this binary data (endian'd)
 186             yield pdecode2.dec.bigendian.eq(bigendian)  # little / big?
 187             yield pdecode2.state.msr.eq(msr)  # set MSR in pdecode2
 188             yield pdecode2.state.pc.eq(pc)  # set PC in pdecode2
 189             yield instruction.eq(ins)          # raw binary instr.
 190             yield Settle()
 191
 192             #
 193             yield from setup_regs(pdecode2, core, test)
 194
 195             ##fast_in = yield pdecode2.e.read_fast1.data
 196             ##spr_in = yield pdecode2.e.read_spr1.data
 197             ##print("dec2 spr/fast in", fast_in, spr_in)
 198
 199             ##fast_out = yield pdecode2.e.write_fast1.data
 200             ##spr_out = yield pdecode2.e.write_spr.data
 201             ##print("dec2 spr/fast in", fast_out, spr_out)
 202
 203             ##fn_unit = yield pdecode2.e.do.fn_unit
 204             ##pia_res = yield from set_fsm_inputs(fsm, pdecode2, sim)
 205             ##yield
 206             opname = code.split(' ')[0]
 207             yield from sim.call(opname)
 208             pc = sim.pc.CIA.value
 209             msr = sim.msr.value
 210             index = pc//4
 211             print("pc after %08x" % (pc))
 212
 213             fsm = core.fus.fus["mmu0"].alu
 214
 215             vld = yield fsm.n.valid_o #fsm
 216             while not vld:
 217                 yield
 218                 if debughang:  print("not valid -- hang")
 219                 vld = yield fsm.n.valid_o
 220                 if debughang==2: vld=1
 221             yield
 222
 223     def run_all(self):
 224         m = Module()
 225         comb = m.d.comb
 226         instruction = Signal(32)
 227
 228         pdecode = create_pdecode()
 229
 230         m.submodules.pdecode2 = pdecode2 = PowerDecode2(pdecode)
 231
 232         pspec = TestMemPspec(ldst_ifacetype='testpi',
 233                              imem_ifacetype='',
 234                              addr_wid=48,
 235                              mask_wid=8,
 236                              reg_wid=64)
 237
 238         m.submodules.core = core = NonProductionCore(pspec,microwatt_mmu=True)
 239
 240         comb += pdecode2.dec.raw_opcode_in.eq(instruction)
 241         sim = Simulator(m)
 242
 243         sim.add_clock(1e-6)
 244
 245         def process():
 246             for test in self.test_data:
 247                 print("test", test.name)
 248                 print("sprs", test.sprs)
 249                 program = test.program
 250                 with self.subTest(test.name):
 251                     yield from self.execute(core, instruction, pdecode2, test)
 252
 253         sim.add_sync_process(process)
 254         with sim.write_vcd("mmu_ldst_simulator.vcd", "mmu_ldst_simulator.gtkw",
 255                            traces=[]):
 256             sim.run()
 257
 258 if __name__ == "__main__":
 259     unittest.main(exit=False)
 260     suite = unittest.TestSuite()
 261     suite.addTest(TestRunner(MMUTestCase().test_data))
 262
 263     runner = unittest.TextTestRunner()
 264     runner.run(suite)