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     yield Settle()
  42     startaddr //= 4 # instructions are 32-bit
  43     mask = ((1<<64)-1)
  44     for insn, code in instructions:
  45         msbs = (startaddr>>1) & mask
  46         val = yield mem._array[msbs]
  47         print ("before set", hex(startaddr), hex(msbs), hex(val))
  48         lsb = 1 if (startaddr & 1) else 0
  49         val = (val | (insn << (lsb*32))) & mask
  50         yield mem._array[msbs].eq(val)
  51         yield Settle()
  52         print ("after  set", hex(startaddr), hex(msbs), hex(val))
  53         print ("instr: %06x 0x%x %s %08x" % (4*startaddr, insn, code, val))
  54         startaddr += 1
  55         startaddr = startaddr & mask
  56
  57
  58 class TestRunner(FHDLTestCase):
  59     def __init__(self, tst_data):
  60         super().__init__("run_all")
  61         self.test_data = tst_data
  62
  63     def run_all(self):
  64         m = Module()
  65         comb = m.d.comb
  66         go_insn_i = Signal()
  67         pc_i = Signal(32)
  68
  69         m.submodules.issuer = issuer = TestIssuer(ifacetype="test_bare_wb",
  70                                                   imemtype="test_bare_wb")
  71         imem = issuer.imem._get_memory()
  72         core = issuer.core
  73         pdecode2 = core.pdecode2
  74         l0 = core.l0
  75
  76         comb += issuer.pc_i.data.eq(pc_i)
  77         comb += issuer.go_insn_i.eq(go_insn_i)
  78
  79         # nmigen Simulation
  80         sim = Simulator(m)
  81         sim.add_clock(1e-6)
  82
  83         def process():
  84
  85             for test in self.test_data:
  86                 print(test.name)
  87                 program = test.program
  88                 self.subTest(test.name)
  89                 print ("regs", test.regs)
  90                 print ("sprs", test.sprs)
  91                 print ("cr", test.cr)
  92                 print ("mem", test.mem)
  93                 print ("msr", test.msr)
  94                 print ("assem", program.assembly)
  95                 gen = list(program.generate_instructions())
  96                 insncode = program.assembly.splitlines()
  97                 instructions = list(zip(gen, insncode))
  98                 sim = ISA(pdecode2, test.regs, test.sprs, test.cr, test.mem,
  99                           test.msr,
 100                           initial_insns=gen, respect_pc=True,
 101                           disassembly=insncode)
 102
 103                 pc = 0 # start address
 104
 105                 yield from setup_i_memory(imem, pc, instructions)
 106                 yield from setup_test_memory(l0, sim)
 107                 yield from setup_regs(core, test)
 108
 109                 yield pc_i.eq(pc)
 110                 yield issuer.pc_i.ok.eq(1)
 111
 112                 index = sim.pc.CIA.value//4
 113                 while index < len(instructions):
 114                     ins, code = instructions[index]
 115
 116                     print("instruction: 0x{:X}".format(ins & 0xffffffff))
 117                     print(index, code)
 118
 119                     # start the instruction
 120                     yield go_insn_i.eq(1)
 121                     yield
 122                     yield issuer.pc_i.ok.eq(0) # don't change PC from now on
 123                     yield go_insn_i.eq(0)      # and don't issue a new insn
 124
 125                     # wait until executed
 126                     yield from wait_for_busy_hi(core)
 127                     yield from wait_for_busy_clear(core)
 128
 129                     print ("sim", code)
 130                     # call simulated operation
 131                     opname = code.split(' ')[0]
 132                     yield from sim.call(opname)
 133                     yield Settle()
 134                     index = sim.pc.CIA.value//4
 135
 136                     # register check
 137                     yield from check_regs(self, sim, core, test, code)
 138
 139                     # Memory check
 140                     yield from check_sim_memory(self, l0, sim, code)
 141
 142         sim.add_sync_process(process)
 143         with sim.write_vcd("issuer_simulator.vcd",
 144                             traces=[]):
 145             sim.run()
 146
 147
 148 if __name__ == "__main__":
 149     unittest.main(exit=False)
 150     suite = unittest.TestSuite()
 151     suite.addTest(TestRunner(GeneralTestCases.test_data))
 152     suite.addTest(TestRunner(LDSTTestCase.test_data))
 153     suite.addTest(TestRunner(CRTestCase.test_data))
 154     suite.addTest(TestRunner(ShiftRotTestCase.test_data))
 155     suite.addTest(TestRunner(LogicalTestCase.test_data))
 156     suite.addTest(TestRunner(ALUTestCase.test_data))
 157     suite.addTest(TestRunner(BranchTestCase.test_data))
 158
 159     runner = unittest.TextTestRunner()
 160     runner.run(suite)
 161