src/soc/simple/test/test_runner.py

   1 """TestRunner class, runs TestIssuer instructions
   2
   3 related bugs:
   4
   5  * https://bugs.libre-soc.org/show_bug.cgi?id=363
   6  * https://bugs.libre-soc.org/show_bug.cgi?id=686#c51
   7 """
   8 from nmigen import Module, Signal, Cat, ClockSignal
   9 from nmigen.hdl.xfrm import ResetInserter
  10 from copy import copy
  11
  12 # NOTE: to use cxxsim, export NMIGEN_SIM_MODE=cxxsim from the shell
  13 # Also, check out the cxxsim nmigen branch, and latest yosys from git
  14 from nmutil.sim_tmp_alternative import Simulator, Settle
  15
  16 from nmutil.formaltest import FHDLTestCase
  17 from nmutil.gtkw import write_gtkw
  18 from nmigen.cli import rtlil
  19 from openpower.decoder.isa.caller import special_sprs, SVP64State
  20 from openpower.decoder.isa.all import ISA
  21 from openpower.endian import bigendian
  22
  23 from openpower.decoder.power_decoder import create_pdecode
  24 from openpower.decoder.power_decoder2 import PowerDecode2
  25 from soc.regfile.regfiles import StateRegs
  26
  27 from soc.simple.issuer import TestIssuerInternal
  28
  29 from soc.config.test.test_loadstore import TestMemPspec
  30 from soc.simple.test.test_core import (setup_regs, check_regs, check_mem,
  31                                        wait_for_busy_clear,
  32                                        wait_for_busy_hi)
  33 from soc.fu.compunits.test.test_compunit import (setup_tst_memory,
  34                                                  check_sim_memory)
  35 from soc.debug.dmi import DBGCore, DBGCtrl, DBGStat
  36 from nmutil.util import wrap
  37 from soc.experiment.test.test_mmu_dcache import wb_get
  38 from openpower.test.state import TestState, StateRunner
  39
  40
  41 def setup_i_memory(imem, startaddr, instructions):
  42     mem = imem
  43     print("insn before, init mem", mem.depth, mem.width, mem,
  44           len(instructions))
  45     for i in range(mem.depth):
  46         yield mem._array[i].eq(0)
  47     yield Settle()
  48     startaddr //= 4  # instructions are 32-bit
  49     if mem.width == 32:
  50         mask = ((1 << 32)-1)
  51         for ins in instructions:
  52             if isinstance(ins, tuple):
  53                 insn, code = ins
  54             else:
  55                 insn, code = ins, ''
  56             insn = insn & 0xffffffff
  57             yield mem._array[startaddr].eq(insn)
  58             yield Settle()
  59             if insn != 0:
  60                 print("instr: %06x 0x%x %s" % (4*startaddr, insn, code))
  61             startaddr += 1
  62             startaddr = startaddr & mask
  63         return
  64
  65     # 64 bit
  66     mask = ((1 << 64)-1)
  67     for ins in instructions:
  68         if isinstance(ins, tuple):
  69             insn, code = ins
  70         else:
  71             insn, code = ins, ''
  72         insn = insn & 0xffffffff
  73         msbs = (startaddr >> 1) & mask
  74         val = yield mem._array[msbs]
  75         if insn != 0:
  76             print("before set", hex(4*startaddr),
  77                   hex(msbs), hex(val), hex(insn))
  78         lsb = 1 if (startaddr & 1) else 0
  79         val = (val | (insn << (lsb*32)))
  80         val = val & mask
  81         yield mem._array[msbs].eq(val)
  82         yield Settle()
  83         if insn != 0:
  84             print("after  set", hex(4*startaddr), hex(msbs), hex(val))
  85             print("instr: %06x 0x%x %s %08x" % (4*startaddr, insn, code, val))
  86         startaddr += 1
  87         startaddr = startaddr & mask
  88
  89
  90 def set_dmi(dmi, addr, data):
  91     yield dmi.req_i.eq(1)
  92     yield dmi.addr_i.eq(addr)
  93     yield dmi.din.eq(data)
  94     yield dmi.we_i.eq(1)
  95     while True:
  96         ack = yield dmi.ack_o
  97         if ack:
  98             break
  99         yield
 100     yield
 101     yield dmi.req_i.eq(0)
 102     yield dmi.addr_i.eq(0)
 103     yield dmi.din.eq(0)
 104     yield dmi.we_i.eq(0)
 105     yield
 106
 107
 108 def get_dmi(dmi, addr):
 109     yield dmi.req_i.eq(1)
 110     yield dmi.addr_i.eq(addr)
 111     yield dmi.din.eq(0)
 112     yield dmi.we_i.eq(0)
 113     while True:
 114         ack = yield dmi.ack_o
 115         if ack:
 116             break
 117         yield
 118     yield  # wait one
 119     data = yield dmi.dout  # get data after ack valid for 1 cycle
 120     yield dmi.req_i.eq(0)
 121     yield dmi.addr_i.eq(0)
 122     yield dmi.we_i.eq(0)
 123     yield
 124     return data
 125
 126
 127 class SimRunner(StateRunner):
 128     def __init__(self, dut, m, pspec):
 129         super().__init__("sim", SimRunner)
 130         self.dut = dut
 131
 132         regreduce_en = pspec.regreduce_en == True
 133         self.simdec2 = simdec2 = PowerDecode2(None, regreduce_en=regreduce_en)
 134         m.submodules.simdec2 = simdec2  # pain in the neck
 135
 136     def prepare_for_test(self, test):
 137         self.test = test
 138         if False:
 139             yield
 140
 141     def run_test(self, instructions, gen, insncode):
 142         """run_sim_state - runs an ISACaller simulation
 143         """
 144
 145         dut, test, simdec2 = self.dut, self.test, self.simdec2
 146         sim_states = []
 147
 148         # set up the Simulator (which must track TestIssuer exactly)
 149         sim = ISA(simdec2, test.regs, test.sprs, test.cr, test.mem,
 150                   test.msr,
 151                   initial_insns=gen, respect_pc=True,
 152                   disassembly=insncode,
 153                   bigendian=bigendian,
 154                   initial_svstate=test.svstate)
 155
 156         # run the loop of the instructions on the current test
 157         index = sim.pc.CIA.value//4
 158         while index < len(instructions):
 159             ins, code = instructions[index]
 160
 161             print("sim instr: 0x{:X}".format(ins & 0xffffffff))
 162             print(index, code)
 163
 164             # set up simulated instruction (in simdec2)
 165             try:
 166                 yield from sim.setup_one()
 167             except KeyError:  # instruction not in imem: stop
 168                 break
 169             yield Settle()
 170
 171             # call simulated operation
 172             print("sim", code)
 173             yield from sim.execute_one()
 174             yield Settle()
 175             index = sim.pc.CIA.value//4
 176
 177             # get sim register and memory TestState, add to list
 178             state = yield from TestState("sim", sim, dut, code)
 179             sim_states.append(state)
 180
 181         return sim_states
 182
 183
 184 class HDLRunner(StateRunner):
 185     def __init__(self, dut, m, pspec):
 186         super().__init__("hdl", HDLRunner)
 187
 188         self.dut = dut
 189         self.pc_i = Signal(32)
 190         self.svstate_i = Signal(64)
 191
 192         #hard_reset = Signal(reset_less=True)
 193         self.issuer = TestIssuerInternal(pspec)
 194         # use DMI RESET command instead, this does actually work though
 195         #issuer = ResetInserter({'coresync': hard_reset,
 196         #                        'sync': hard_reset})(issuer)
 197         m.submodules.issuer = self.issuer
 198         self.dmi = self.issuer.dbg.dmi
 199
 200         comb = m.d.comb
 201         comb += self.issuer.pc_i.data.eq(self.pc_i)
 202         comb += self.issuer.svstate_i.data.eq(self.svstate_i)
 203
 204     def prepare_for_test(self, test):
 205         self.test = test
 206
 207         # set up bigendian (TODO: don't do this, use MSR)
 208         yield self.issuer.core_bigendian_i.eq(bigendian)
 209         yield Settle()
 210
 211         yield
 212         yield
 213         yield
 214         yield
 215
 216     def setup_during_test(self):
 217         yield from set_dmi(self.dmi, DBGCore.CTRL, 1<<DBGCtrl.STOP)
 218         yield
 219
 220     def run_test(self, instructions):
 221         """run_hdl_state - runs a TestIssuer nmigen HDL simulation
 222         """
 223
 224         imem = self.issuer.imem._get_memory()
 225         core = self.issuer.core
 226         dmi = self.issuer.dbg.dmi
 227         pdecode2 = self.issuer.pdecode2
 228         l0 = core.l0
 229         hdl_states = []
 230
 231         # establish the TestIssuer context (mem, regs etc)
 232
 233         pc = 0  # start address
 234         counter = 0  # test to pause/start
 235
 236         yield from setup_i_memory(imem, pc, instructions)
 237         yield from setup_tst_memory(l0, self.test.mem)
 238         yield from setup_regs(pdecode2, core, self.test)
 239
 240         # set PC and SVSTATE
 241         yield self.pc_i.eq(pc)
 242         yield self.issuer.pc_i.ok.eq(1)
 243
 244         # copy initial SVSTATE
 245         initial_svstate = copy(self.test.svstate)
 246         if isinstance(initial_svstate, int):
 247             initial_svstate = SVP64State(initial_svstate)
 248         yield self.svstate_i.eq(initial_svstate.value)
 249         yield self.issuer.svstate_i.ok.eq(1)
 250         yield
 251
 252         print("instructions", instructions)
 253
 254         # run the loop of the instructions on the current test
 255         index = (yield self.issuer.cur_state.pc) // 4
 256         while index < len(instructions):
 257             ins, code = instructions[index]
 258
 259             print("hdl instr: 0x{:X}".format(ins & 0xffffffff))
 260             print(index, code)
 261
 262             if counter == 0:
 263                 # start the core
 264                 yield
 265                 yield from set_dmi(dmi, DBGCore.CTRL,
 266                                 1<<DBGCtrl.START)
 267                 yield self.issuer.pc_i.ok.eq(0) # no change PC after this
 268                 yield self.issuer.svstate_i.ok.eq(0) # ditto
 269                 yield
 270                 yield
 271
 272             counter = counter + 1
 273
 274             # wait until executed
 275             while not (yield self.issuer.insn_done):
 276                 yield
 277
 278             yield Settle()
 279
 280             index = (yield self.issuer.cur_state.pc) // 4
 281
 282             terminated = yield self.issuer.dbg.terminated_o
 283             print("terminated", terminated)
 284
 285             if index < len(instructions):
 286                 # Get HDL mem and state
 287                 state = yield from TestState("hdl", core, self.dut,
 288                                             code)
 289                 hdl_states.append(state)
 290
 291             if index >= len(instructions):
 292                 print ("index over, send dmi stop")
 293                 # stop at end
 294                 yield from set_dmi(dmi, DBGCore.CTRL,
 295                                 1<<DBGCtrl.STOP)
 296                 yield
 297                 yield
 298
 299             terminated = yield self.issuer.dbg.terminated_o
 300             print("terminated(2)", terminated)
 301             if terminated:
 302                 break
 303
 304         return hdl_states
 305
 306     def end_test(self):
 307         yield from set_dmi(self.dmi, DBGCore.CTRL, 1<<DBGCtrl.STOP)
 308         yield
 309         yield
 310
 311         # TODO, here is where the static (expected) results
 312         # can be checked: register check (TODO, memory check)
 313         # see https://bugs.libre-soc.org/show_bug.cgi?id=686#c51
 314         # yield from check_regs(self, sim, core, test, code,
 315         #                       >>>expected_data<<<)
 316
 317         # get CR
 318         cr = yield from get_dmi(self.dmi, DBGCore.CR)
 319         print("after test %s cr value %x" % (self.test.name, cr))
 320
 321         # get XER
 322         xer = yield from get_dmi(self.dmi, DBGCore.XER)
 323         print("after test %s XER value %x" % (self.test.name, xer))
 324
 325         # test of dmi reg get
 326         for int_reg in range(32):
 327             yield from set_dmi(self.dmi, DBGCore.GSPR_IDX, int_reg)
 328             value = yield from get_dmi(self.dmi, DBGCore.GSPR_DATA)
 329
 330             print("after test %s reg %2d value %x" %
 331             (self.test.name, int_reg, value))
 332
 333         # pull a reset
 334         yield from set_dmi(self.dmi, DBGCore.CTRL, 1<<DBGCtrl.RESET)
 335         yield
 336
 337
 338 class TestRunner(FHDLTestCase):
 339     def __init__(self, tst_data, microwatt_mmu=False, rom=None,
 340                         svp64=True, run_hdl=True, run_sim=True):
 341         super().__init__("run_all")
 342         self.test_data = tst_data
 343         self.microwatt_mmu = microwatt_mmu
 344         self.rom = rom
 345         self.svp64 = svp64
 346         self.run_hdl = run_hdl
 347         self.run_sim = run_sim
 348
 349     def run_all(self):
 350         m = Module()
 351         comb = m.d.comb
 352         if self.microwatt_mmu:
 353             ldst_ifacetype = 'test_mmu_cache_wb'
 354         else:
 355             ldst_ifacetype = 'test_bare_wb'
 356         imem_ifacetype = 'test_bare_wb'
 357
 358         pspec = TestMemPspec(ldst_ifacetype=ldst_ifacetype,
 359                              imem_ifacetype=imem_ifacetype,
 360                              addr_wid=48,
 361                              mask_wid=8,
 362                              imem_reg_wid=64,
 363                              # wb_data_width=32,
 364                              use_pll=False,
 365                              nocore=False,
 366                              xics=False,
 367                              gpio=False,
 368                              regreduce=True,
 369                              svp64=self.svp64,
 370                              mmu=self.microwatt_mmu,
 371                              reg_wid=64)
 372
 373         ###### SETUP PHASE #######
 374         # StateRunner.setup_for_test()
 375
 376         state_list = []
 377
 378         # TODO https://bugs.libre-soc.org/show_bug.cgi?id=686#c73
 379         if self.run_hdl:
 380             hdlrun = HDLRunner(self, m, pspec)
 381             state_list.append(hdlrun)
 382
 383         if self.run_sim:
 384             simrun = SimRunner(self, m, pspec)
 385             state_list.append(simrun)
 386
 387         # run core clock at same rate as test clock
 388         # XXX this has to stay here! TODO, work out why,
 389         # but Simulation-only fails without it
 390         intclk = ClockSignal("coresync")
 391         comb += intclk.eq(ClockSignal())
 392
 393         # nmigen Simulation - everything runs around this, so it
 394         # still has to be created.
 395         sim = Simulator(m)
 396         sim.add_clock(1e-6)
 397
 398         def process():
 399
 400             ###### PREPARATION PHASE AT START OF RUNNING #######
 401             # StateRunner.setup_during_test()
 402             # TODO https://bugs.libre-soc.org/show_bug.cgi?id=686#c73
 403             # but "normalise" the APIs, make openpower-isa StateRunner
 404             # dummy "yield" functions so if they're not provided at least
 405             # there is a fallback which can be "yielded".
 406
 407             for runner in state_list:
 408                 yield from runner.setup_during_test()
 409
 410             # get each test, completely reset the core, and run it
 411
 412             for test in self.test_data:
 413
 414                 with self.subTest(test.name):
 415
 416                     ###### PREPARATION PHASE AT START OF TEST #######
 417                     # StateRunner.prepare_for_test()
 418                     # TODO https://bugs.libre-soc.org/show_bug.cgi?id=686#c73
 419
 420                     for runner in state_list:
 421                         yield from runner.prepare_for_test(test)
 422
 423                     print(test.name)
 424                     program = test.program
 425                     print("regs", test.regs)
 426                     print("sprs", test.sprs)
 427                     print("cr", test.cr)
 428                     print("mem", test.mem)
 429                     print("msr", test.msr)
 430                     print("assem", program.assembly)
 431                     gen = list(program.generate_instructions())
 432                     insncode = program.assembly.splitlines()
 433                     instructions = list(zip(gen, insncode))
 434
 435                     ###### RUNNING OF EACH TEST #######
 436                     # StateRunner.step_test()
 437
 438                     # Run two tests (TODO, move these to functions)
 439                     # * first the Simulator, collate a batch of results
 440                     # * then the HDL, likewise
 441                     #   (actually, the other way round because running
 442                     #    Simulator somehow modifies the test state!)
 443                     # * finally, compare all the results
 444
 445                     # TODO https://bugs.libre-soc.org/show_bug.cgi?id=686#c73
 446
 447                     ##########
 448                     # 1. HDL
 449                     ##########
 450                     if self.run_hdl:
 451                         hdl_states = yield from hdlrun.run_test(instructions)
 452
 453                     ##########
 454                     # 2. Simulator
 455                     ##########
 456
 457                     if self.run_sim:
 458                         sim_states = yield from simrun.run_test(
 459                                                           instructions, gen,
 460                                                           insncode)
 461
 462                     ###### COMPARING THE TESTS #######
 463
 464                     ###############
 465                     # 3. Compare
 466                     ###############
 467
 468                     # TODO: here just grab one entry from list_of_sim_runners
 469                     # (doesn't matter which one, honestly)
 470                     # TODO https://bugs.libre-soc.org/show_bug.cgi?id=686#c73
 471
 472                     if self.run_sim:
 473                         last_sim = copy(sim_states[-1])
 474                     elif self.run_hdl:
 475                         last_sim = copy(hdl_states[-1])
 476                     else:
 477                         last_sim = None # err what are you doing??
 478
 479                     if self.run_hdl:
 480                         print ("hdl_states")
 481                         for state in hdl_states:
 482                             print (state)
 483
 484                     if self.run_sim:
 485                         print ("sim_states")
 486                         for state in sim_states:
 487                             print (state)
 488
 489                     if self.run_hdl and self.run_sim:
 490                         for simstate, hdlstate in zip(sim_states, hdl_states):
 491                             simstate.compare(hdlstate)     # register check
 492                             simstate.compare_mem(hdlstate) # memory check
 493
 494                     # compare against expected results
 495                     if test.expected is not None:
 496                         # have to put these in manually
 497                         test.expected.to_test = test.expected
 498                         test.expected.dut = self
 499                         test.expected.state_type = "expected"
 500                         test.expected.code = 0
 501                         # do actual comparison, against last item
 502                         last_sim.compare(test.expected)
 503
 504                     if self.run_hdl and self.run_sim:
 505                         self.assertTrue(len(hdl_states) == len(sim_states),
 506                                     "number of instructions run not the same")
 507
 508                 ###### END OF A TEST #######
 509                 # StateRunner.end_test()
 510                 # TODO https://bugs.libre-soc.org/show_bug.cgi?id=686#c73
 511
 512                 for runner in state_list:
 513                     yield from runner.end_test() # TODO, some arguments?
 514
 515             ###### END OF EVERYTHING (but none needs doing, still call fn) ####
 516             # StateRunner.cleanup()
 517             # TODO https://bugs.libre-soc.org/show_bug.cgi?id=686#c73
 518
 519             for runner in state_list:
 520                 yield from runner.cleanup() # TODO, some arguments?
 521
 522         styles = {
 523             'dec': {'base': 'dec'},
 524             'bin': {'base': 'bin'},
 525             'closed': {'closed': True}
 526         }
 527
 528         traces = [
 529             'clk',
 530             ('state machines', 'closed', [
 531                 'fetch_pc_i_valid', 'fetch_pc_o_ready',
 532                 'fetch_fsm_state',
 533                 'fetch_insn_o_valid', 'fetch_insn_i_ready',
 534                 'pred_insn_i_valid', 'pred_insn_o_ready',
 535                 'fetch_predicate_state',
 536                 'pred_mask_o_valid', 'pred_mask_i_ready',
 537                 'issue_fsm_state',
 538                 'exec_insn_i_valid', 'exec_insn_o_ready',
 539                 'exec_fsm_state',
 540                 'exec_pc_o_valid', 'exec_pc_i_ready',
 541                 'insn_done', 'core_stop_o', 'pc_i_ok', 'pc_changed',
 542                 'is_last', 'dec2.no_out_vec']),
 543             {'comment': 'fetch and decode'},
 544             (None, 'dec', [
 545                 'cia[63:0]', 'nia[63:0]', 'pc[63:0]',
 546                 'cur_pc[63:0]', 'core_core_cia[63:0]']),
 547             'raw_insn_i[31:0]',
 548             'raw_opcode_in[31:0]', 'insn_type', 'dec2.dec2_exc_happened',
 549             ('svp64 decoding', 'closed', [
 550                 'svp64_rm[23:0]', ('dec2.extra[8:0]', 'bin'),
 551                 'dec2.sv_rm_dec.mode', 'dec2.sv_rm_dec.predmode',
 552                 'dec2.sv_rm_dec.ptype_in',
 553                 'dec2.sv_rm_dec.dstpred[2:0]', 'dec2.sv_rm_dec.srcpred[2:0]',
 554                 'dstmask[63:0]', 'srcmask[63:0]',
 555                 'dregread[4:0]', 'dinvert',
 556                 'sregread[4:0]', 'sinvert',
 557                 'core.int.pred__addr[4:0]', 'core.int.pred__data_o[63:0]',
 558                 'core.int.pred__ren']),
 559             ('register augmentation', 'dec', 'closed', [
 560                 {'comment': 'v3.0b registers'},
 561                 'dec2.dec_o.RT[4:0]',
 562                 'dec2.dec_a.RA[4:0]',
 563                 'dec2.dec_b.RB[4:0]',
 564                 ('Rdest', [
 565                     'dec2.o_svdec.reg_in[4:0]',
 566                     ('dec2.o_svdec.spec[2:0]', 'bin'),
 567                     'dec2.o_svdec.reg_out[6:0]']),
 568                 ('Rsrc1', [
 569                     'dec2.in1_svdec.reg_in[4:0]',
 570                     ('dec2.in1_svdec.spec[2:0]', 'bin'),
 571                     'dec2.in1_svdec.reg_out[6:0]']),
 572                 ('Rsrc1', [
 573                     'dec2.in2_svdec.reg_in[4:0]',
 574                     ('dec2.in2_svdec.spec[2:0]', 'bin'),
 575                     'dec2.in2_svdec.reg_out[6:0]']),
 576                 {'comment': 'SVP64 registers'},
 577                 'dec2.rego[6:0]', 'dec2.reg1[6:0]', 'dec2.reg2[6:0]'
 578             ]),
 579             {'comment': 'svp64 context'},
 580             'core_core_vl[6:0]', 'core_core_maxvl[6:0]',
 581             'core_core_srcstep[6:0]', 'next_srcstep[6:0]',
 582             'core_core_dststep[6:0]',
 583             {'comment': 'issue and execute'},
 584             'core.core_core_insn_type',
 585             (None, 'dec', [
 586                 'core_rego[6:0]', 'core_reg1[6:0]', 'core_reg2[6:0]']),
 587             'issue_i', 'busy_o',
 588             {'comment': 'dmi'},
 589             'dbg.dmi_req_i', 'dbg.dmi_ack_o',
 590             {'comment': 'instruction memory'},
 591             'imem.sram.rdport.memory(0)[63:0]',
 592             {'comment': 'registers'},
 593             # match with soc.regfile.regfiles.IntRegs port names
 594             'core.int.rp_src1.memory(0)[63:0]',
 595             'core.int.rp_src1.memory(1)[63:0]',
 596             'core.int.rp_src1.memory(2)[63:0]',
 597             'core.int.rp_src1.memory(3)[63:0]',
 598             'core.int.rp_src1.memory(4)[63:0]',
 599             'core.int.rp_src1.memory(5)[63:0]',
 600             'core.int.rp_src1.memory(6)[63:0]',
 601             'core.int.rp_src1.memory(7)[63:0]',
 602             'core.int.rp_src1.memory(9)[63:0]',
 603             'core.int.rp_src1.memory(10)[63:0]',
 604             'core.int.rp_src1.memory(13)[63:0]'
 605         ]
 606
 607         # PortInterface module path varies depending on MMU option
 608         if self.microwatt_mmu:
 609             pi_module = 'core.ldst0'
 610         else:
 611             pi_module = 'core.fus.ldst0'
 612
 613         traces += [('ld/st port interface', {'submodule': pi_module}, [
 614             'oper_r__insn_type',
 615             'ldst_port0_is_ld_i',
 616             'ldst_port0_is_st_i',
 617             'ldst_port0_busy_o',
 618             'ldst_port0_addr_i[47:0]',
 619             'ldst_port0_addr_i_ok',
 620             'ldst_port0_addr_ok_o',
 621             'ldst_port0_exc_happened',
 622             'ldst_port0_st_data_i[63:0]',
 623             'ldst_port0_st_data_i_ok',
 624             'ldst_port0_ld_data_o[63:0]',
 625             'ldst_port0_ld_data_o_ok',
 626             'exc_o_happened',
 627             'cancel'
 628         ])]
 629
 630         if self.microwatt_mmu:
 631             traces += [
 632                 {'comment': 'microwatt_mmu'},
 633                 'core.fus.mmu0.alu_mmu0.illegal',
 634                 'core.fus.mmu0.alu_mmu0.debug0[3:0]',
 635                 'core.fus.mmu0.alu_mmu0.mmu.state',
 636                 'core.fus.mmu0.alu_mmu0.mmu.pid[31:0]',
 637                 'core.fus.mmu0.alu_mmu0.mmu.prtbl[63:0]',
 638                 {'comment': 'wishbone_memory'},
 639                 'core.fus.mmu0.alu_mmu0.dcache.stb',
 640                 'core.fus.mmu0.alu_mmu0.dcache.cyc',
 641                 'core.fus.mmu0.alu_mmu0.dcache.we',
 642                 'core.fus.mmu0.alu_mmu0.dcache.ack',
 643                 'core.fus.mmu0.alu_mmu0.dcache.stall,'
 644             ]
 645
 646         write_gtkw("issuer_simulator.gtkw",
 647                    "issuer_simulator.vcd",
 648                    traces, styles, module='top.issuer')
 649
 650         # add run of instructions
 651         sim.add_sync_process(process)
 652
 653         # optionally, if a wishbone-based ROM is passed in, run that as an
 654         # extra emulated process
 655         if self.rom is not None:
 656             dcache = core.fus.fus["mmu0"].alu.dcache
 657             default_mem = self.rom
 658             sim.add_sync_process(wrap(wb_get(dcache, default_mem, "DCACHE")))
 659
 660         with sim.write_vcd("issuer_simulator.vcd"):
 661             sim.run()