From: Tobias Platen Date: Thu, 8 Oct 2020 17:39:06 +0000 (+0200) Subject: add WIP test_pipe_caller.py for mmu X-Git-Tag: 24jan2021_ls180~187 X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=5877ad5a555298291d85439cd6329da92dd37de0;p=soc.git add WIP test_pipe_caller.py for mmu --- diff --git a/src/soc/fu/mmu/test/__init__.py b/src/soc/fu/mmu/test/__init__.py new file mode 100644 index 00000000..e69de29b diff --git a/src/soc/fu/mmu/test/test_pipe_caller.py b/src/soc/fu/mmu/test/test_pipe_caller.py new file mode 100644 index 00000000..d2961514 --- /dev/null +++ b/src/soc/fu/mmu/test/test_pipe_caller.py @@ -0,0 +1,190 @@ +from nmigen import Module, Signal + +# NOTE: to use cxxsim, export NMIGEN_SIM_MODE=cxxsim from the shell +# Also, check out the cxxsim nmigen branch, and latest yosys from git +from nmutil.sim_tmp_alternative import Simulator, Settle + +from nmigen.cli import rtlil +import unittest +from soc.decoder.isa.caller import ISACaller, special_sprs +from soc.decoder.power_decoder import (create_pdecode) +from soc.decoder.power_decoder2 import (PowerDecode2) +from soc.decoder.power_enums import (XER_bits, Function, MicrOp, CryIn) +from soc.decoder.selectable_int import SelectableInt +from soc.simulator.program import Program +from soc.decoder.isa.all import ISA +from soc.config.endian import bigendian +from soc.consts import MSR + + +from soc.fu.test.common import ( + TestAccumulatorBase, skip_case, TestCase, ALUHelpers) +from soc.fu.spr.pipeline import SPRBasePipe +from soc.fu.spr.pipe_data import SPRPipeSpec +import random + + +#incomplete test - not working yet +class MMUTestCase(TestAccumulatorBase): + + def case_1_mmu(self): + # test case for MTSPR, MFSPR, DCBZ and TLBIE. + lst = ["mfspr 1, 26", # SRR0 + "mfspr 2, 27", # SRR1 + "mfspr 3, 8", # LR + "mfspr 4, 1", ] # XER + initial_regs = [0] * 32 + initial_sprs = {'SRR0': 0x12345678, 'SRR1': 0x5678, 'LR': 0x1234, + 'XER': 0xe00c0000} + self.add_case(Program(lst, bigendian), + initial_regs, initial_sprs) + + def case_ilang(self): + pspec = SPRPipeSpec(id_wid=2) + alu = SPRBasePipe(pspec) + vl = rtlil.convert(alu, ports=alu.ports()) + with open("trap_pipeline.il", "w") as f: + f.write(vl) + + +class TestRunner(unittest.TestCase): + def __init__(self, test_data): + super().__init__("run_all") + self.test_data = test_data + + def execute(self, alu, instruction, pdecode2, test): + program = test.program + sim = ISA(pdecode2, test.regs, test.sprs, test.cr, + test.mem, test.msr, + bigendian=bigendian) + gen = program.generate_instructions() + instructions = list(zip(gen, program.assembly.splitlines())) + + pc = sim.pc.CIA.value + msr = sim.msr.value + index = pc//4 + while index < len(instructions): + ins, code = instructions[index] + + print("pc %08x instr: %08x" % (pc, ins & 0xffffffff)) + print(code) + + if 'XER' in sim.spr: + so = 1 if sim.spr['XER'][XER_bits['SO']] else 0 + ov = 1 if sim.spr['XER'][XER_bits['OV']] else 0 + ov32 = 1 if sim.spr['XER'][XER_bits['OV32']] else 0 + print("before: so/ov/32", so, ov, ov32) + + # ask the decoder to decode this binary data (endian'd) + yield pdecode2.dec.bigendian.eq(bigendian) # little / big? + yield pdecode2.state.msr.eq(msr) # set MSR in pdecode2 + yield pdecode2.state.pc.eq(pc) # set PC in pdecode2 + yield instruction.eq(ins) # raw binary instr. + yield Settle() + + fast_in = yield pdecode2.e.read_fast1.data + spr_in = yield pdecode2.e.read_spr1.data + print("dec2 spr/fast in", fast_in, spr_in) + + fast_out = yield pdecode2.e.write_fast1.data + spr_out = yield pdecode2.e.write_spr.data + print("dec2 spr/fast in", fast_out, spr_out) + + fn_unit = yield pdecode2.e.do.fn_unit + self.assertEqual(fn_unit, Function.SPR.value) + alu_o = yield from set_alu_inputs(alu, pdecode2, sim) + yield + opname = code.split(' ')[0] + yield from sim.call(opname) + pc = sim.pc.CIA.value + msr = sim.msr.value + index = pc//4 + print("pc after %08x" % (pc)) + + vld = yield alu.n.valid_o + while not vld: + yield + vld = yield alu.n.valid_o + yield + + yield from self.check_alu_outputs(alu, pdecode2, sim, code) + + def run_all(self): + m = Module() + comb = m.d.comb + instruction = Signal(32) + + pdecode = create_pdecode() + + m.submodules.pdecode2 = pdecode2 = PowerDecode2(pdecode) + + pspec = SPRPipeSpec(id_wid=2) + m.submodules.alu = alu = SPRBasePipe(pspec) + + comb += alu.p.data_i.ctx.op.eq_from_execute1(pdecode2.do) + comb += alu.p.valid_i.eq(1) + comb += alu.n.ready_i.eq(1) + comb += pdecode2.dec.raw_opcode_in.eq(instruction) + sim = Simulator(m) + + sim.add_clock(1e-6) + + def process(): + for test in self.test_data: + print("test", test.name) + print("sprs", test.sprs) + program = test.program + with self.subTest(test.name): + yield from self.execute(alu, instruction, pdecode2, test) + + sim.add_sync_process(process) + with sim.write_vcd("alu_simulator.vcd", "simulator.gtkw", + traces=[]): + sim.run() + + def check_alu_outputs(self, alu, dec2, sim, code): + + rc = yield dec2.e.do.rc.data + cridx_ok = yield dec2.e.write_cr.ok + cridx = yield dec2.e.write_cr.data + + print("check extra output", repr(code), cridx_ok, cridx) + if rc: + self.assertEqual(cridx, 0, code) + + sim_o = {} + res = {} + + yield from ALUHelpers.get_int_o(res, alu, dec2) + yield from ALUHelpers.get_fast_spr1(res, alu, dec2) + yield from ALUHelpers.get_slow_spr1(res, alu, dec2) + yield from ALUHelpers.get_xer_ov(res, alu, dec2) + yield from ALUHelpers.get_xer_ca(res, alu, dec2) + yield from ALUHelpers.get_xer_so(res, alu, dec2) + + print("output", res) + + yield from ALUHelpers.get_sim_int_o(sim_o, sim, dec2) + yield from ALUHelpers.get_wr_sim_xer_so(sim_o, sim, alu, dec2) + yield from ALUHelpers.get_wr_sim_xer_ov(sim_o, sim, alu, dec2) + yield from ALUHelpers.get_wr_sim_xer_ca(sim_o, sim, dec2) + yield from ALUHelpers.get_wr_fast_spr1(sim_o, sim, dec2) + yield from ALUHelpers.get_wr_slow_spr1(sim_o, sim, dec2) + + print("sim output", sim_o) + + ALUHelpers.check_xer_ov(self, res, sim_o, code) + ALUHelpers.check_xer_ca(self, res, sim_o, code) + ALUHelpers.check_xer_so(self, res, sim_o, code) + ALUHelpers.check_int_o(self, res, sim_o, code) + ALUHelpers.check_fast_spr1(self, res, sim_o, code) + ALUHelpers.check_slow_spr1(self, res, sim_o, code) + + +if __name__ == "__main__": + unittest.main(exit=False) + suite = unittest.TestSuite() + suite.addTest(TestRunner(SPRTestCase().test_data)) + + runner = unittest.TextTestRunner() + runner.run(suite)