src/soc/simple/test/test_issuer.py

   1 """simple core test, runs instructions from a TestMemory
   2
   3 related bugs:
   4
   5  * https://bugs.libre-soc.org/show_bug.cgi?id=363
   6 """
   7 from nmigen import Module, Signal, Cat
   8 from nmigen.back.pysim import Simulator, Delay, Settle
   9 from nmutil.formaltest import FHDLTestCase
  10 from nmigen.cli import rtlil
  11 import unittest
  12 from soc.decoder.isa.caller import special_sprs
  13 from soc.decoder.isa.all import ISA
  14 from soc.decoder.power_enums import Function, XER_bits
  15
  16
  17 from soc.simple.issuer import TestIssuer
  18 from soc.experiment.compalu_multi import find_ok # hack
  19
  20 from soc.simple.test.test_core import (setup_regs, check_regs,
  21                                        wait_for_busy_clear,
  22                                        wait_for_busy_hi)
  23 from soc.fu.compunits.test.test_compunit import (setup_test_memory,
  24                                                  check_sim_memory)
  25
  26 # test with ALU data and Logical data
  27 from soc.fu.alu.test.test_pipe_caller import ALUTestCase
  28 from soc.fu.logical.test.test_pipe_caller import LogicalTestCase
  29 from soc.fu.shift_rot.test.test_pipe_caller import ShiftRotTestCase
  30 from soc.fu.cr.test.test_pipe_caller import CRTestCase
  31 from soc.fu.branch.test.test_pipe_caller import BranchTestCase
  32 from soc.fu.ldst.test.test_pipe_caller import LDSTTestCase
  33 from soc.simulator.test_sim import GeneralTestCases
  34
  35
  36 def setup_i_memory(imem, startaddr, instructions):
  37     mem = imem
  38     print ("insn before, init mem", mem.depth, mem.width, mem)
  39     for i in range(mem.depth):
  40         yield mem._array[i].eq(0)
  41     startaddr //= 4 # assume i-mem is 32-bit wide
  42     for insn, code in instructions:
  43         print ("instr: %06x 0x%x %s" % (4*startaddr, insn, code))
  44         yield mem._array[startaddr].eq(insn)
  45         startaddr += 1
  46
  47
  48 class TestRunner(FHDLTestCase):
  49     def __init__(self, tst_data):
  50         super().__init__("run_all")
  51         self.test_data = tst_data
  52
  53     def run_all(self):
  54         m = Module()
  55         comb = m.d.comb
  56         go_insn_i = Signal()
  57         pc_i = Signal(32)
  58
  59         m.submodules.issuer = issuer = TestIssuer(ifacetype="test_bare_wb")
  60         imem = issuer.imem.mem
  61         core = issuer.core
  62         pdecode2 = core.pdecode2
  63         l0 = core.l0
  64
  65         comb += issuer.pc_i.data.eq(pc_i)
  66         comb += issuer.go_insn_i.eq(go_insn_i)
  67
  68         # nmigen Simulation
  69         sim = Simulator(m)
  70         sim.add_clock(1e-6)
  71
  72         def process():
  73
  74             for test in self.test_data:
  75                 print(test.name)
  76                 program = test.program
  77                 self.subTest(test.name)
  78                 print ("regs", test.regs)
  79                 print ("sprs", test.sprs)
  80                 print ("cr", test.cr)
  81                 print ("mem", test.mem)
  82                 print ("msr", test.msr)
  83                 print ("assem", program.assembly)
  84                 gen = list(program.generate_instructions())
  85                 insncode = program.assembly.splitlines()
  86                 instructions = list(zip(gen, insncode))
  87                 sim = ISA(pdecode2, test.regs, test.sprs, test.cr, test.mem,
  88                           test.msr,
  89                           initial_insns=gen, respect_pc=True,
  90                           disassembly=insncode)
  91
  92                 pc = 0 # start address
  93
  94                 yield from setup_i_memory(imem, pc, instructions)
  95                 yield from setup_test_memory(l0, sim)
  96                 yield from setup_regs(core, test)
  97
  98                 yield pc_i.eq(pc)
  99                 yield issuer.pc_i.ok.eq(1)
 100
 101                 index = sim.pc.CIA.value//4
 102                 while index < len(instructions):
 103                     ins, code = instructions[index]
 104
 105                     print("instruction: 0x{:X}".format(ins & 0xffffffff))
 106                     print(index, code)
 107
 108                     # start the instruction
 109                     yield go_insn_i.eq(1)
 110                     yield
 111                     yield issuer.pc_i.ok.eq(0) # don't change PC from now on
 112                     yield go_insn_i.eq(0)      # and don't issue a new insn
 113
 114                     # wait until executed
 115                     yield from wait_for_busy_hi(core)
 116                     yield from wait_for_busy_clear(core)
 117
 118                     print ("sim", code)
 119                     # call simulated operation
 120                     opname = code.split(' ')[0]
 121                     yield from sim.call(opname)
 122                     yield Settle()
 123                     index = sim.pc.CIA.value//4
 124
 125                     # register check
 126                     yield from check_regs(self, sim, core, test, code)
 127
 128                     # Memory check
 129                     yield from check_sim_memory(self, l0, sim, code)
 130
 131         sim.add_sync_process(process)
 132         with sim.write_vcd("issuer_simulator.vcd",
 133                             traces=[]):
 134             sim.run()
 135
 136
 137 if __name__ == "__main__":
 138     unittest.main(exit=False)
 139     suite = unittest.TestSuite()
 140     suite.addTest(TestRunner(GeneralTestCases.test_data))
 141     suite.addTest(TestRunner(LDSTTestCase.test_data))
 142     suite.addTest(TestRunner(CRTestCase.test_data))
 143     suite.addTest(TestRunner(ShiftRotTestCase.test_data))
 144     suite.addTest(TestRunner(LogicalTestCase.test_data))
 145     suite.addTest(TestRunner(ALUTestCase.test_data))
 146     suite.addTest(TestRunner(BranchTestCase.test_data))
 147
 148     runner = unittest.TextTestRunner()
 149     runner.run(suite)
 150