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riscv-formal-nmigen
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Update rvfi_insn_check.py

This commit is contained in:
Donald Sebastian Leung 2020-07-28 17:55:30 +08:00
parent 032e4c254d
commit 0c971e96ce
1 changed files with 143 additions and 1 deletions
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144
checks/rvfi_insn_check.py
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@ -1,5 +1,7 @@
from nmigen import * from nmigen import *
from nmigen.hdl.ast import * from nmigen.hdl.ast import *
# TODO: Find a way to make this import work
# from ..insns.insn_add import *
class rvfi_insn_check(Elaboratable): class rvfi_insn_check(Elaboratable):
def __init__(self, RISCV_FORMAL_ILEN=32, RISCV_FORMAL_XLEN=32): def __init__(self, RISCV_FORMAL_ILEN=32, RISCV_FORMAL_XLEN=32):
@ -59,6 +61,146 @@ class rvfi_insn_check(Elaboratable):
def elaborate(self, platform): def elaborate(self, platform):
m = Module() m = Module()
# TODO valid = Signal(1)
m.d.comb += valid.eq((~self.reset) & self.rvfi_valid)
insn = Signal(self.RISCV_FORMAL_ILEN)
m.d.comb += insn.eq(self.rvfi_insn)
trap = Signal(1)
m.d.comb += trap.eq(self.rvfi_trap)
halt = Signal(1)
m.d.comb += halt.eq(self.rvfi_halt)
intr = Signal(1)
m.d.comb += intr.eq(self.rvfi_intr)
rs1_addr = Signal(5)
m.d.comb += rs1_addr.eq(self.rvfi_rs1_addr)
rs2_addr = Signal(5)
m.d.comb += rs2_addr.eq(self.rvfi_rs2_addr)
rs1_rdata = Signal(self.RISCV_FORMAL_XLEN)
m.d.comb += rs1_rdata.eq(self.rvfi_rs1_rdata)
rs2_rdata = Signal(self.RISCV_FORMAL_XLEN)
m.d.comb += rs2_rdata.eq(self.rvfi_rs2_rdata)
rd_addr = Signal(5)
m.d.comb += rd_addr.eq(self.rvfi_rd_addr)
rd_wdata = Signal(self.RISCV_FORMAL_XLEN)
m.d.comb += rd_wdata.eq(self.rvfi_rd_wdata)
pc_rdata = Signal(self.RISCV_FORMAL_XLEN)
m.d.comb += pc_rdata.eq(self.rvfi_pc_rdata)
pc_wdata = Signal(self.RISCV_FORMAL_XLEN)
m.d.comb += pc_wdata.eq(self.rvfi_pc_wdata)
mem_addr = Signal(self.RISCV_FORMAL_XLEN)
m.d.comb += mem_addr.eq(self.rvfi_mem_addr)
mem_rmask = Signal(int(self.RISCV_FORMAL_XLEN // 8))
m.d.comb += mem_rmask.eq(self.rvfi_mem_rmask)
mem_wmask = Signal(int(self.RISCV_FORMAL_XLEN // 8))
m.d.comb += mem_wmask.eq(self.rvfi_mem_wmask)
mem_rdata = Signal(self.RISCV_FORMAL_XLEN)
m.d.comb += mem_rdata.eq(self.rvfi_mem_rdata)
mem_wdata = Signal(self.RISCV_FORMAL_XLEN)
m.d.comb += mem_wdata.eq(self.rvfi_mem_wdata)
spec_valid = Signal(1)
spec_trap = Signal(1)
spec_rs1_addr = Signal(5)
spec_rs2_addr = Signal(5)
spec_rd_addr = Signal(5)
spec_rd_wdata = Signal(self.RISCV_FORMAL_XLEN)
spec_pc_wdata = Signal(self.RISCV_FORMAL_XLEN)
spec_mem_addr = Signal(self.RISCV_FORMAL_XLEN)
spec_mem_rmask = Signal(int(self.RISCV_FORMAL_XLEN // 8))
spec_mem_wmask = Signal(int(self.RISCV_FORMAL_XLEN // 8))
spec_mem_wdata = Signal(self.RISCV_FORMAL_XLEN)
rs1_rdata_or_zero = Signal(self.RISCV_FORMAL_XLEN)
m.d.comb += rs1_rdata_or_zero.eq(Mux(spec_rs1_addr != 0, rs1_rdata, 0))
rs2_rdata_or_zero = Signal(self.RISCV_FORMAL_XLEN)
m.d.comb += rs2_rdata_or_zero.eq(Mux(spec_rs2_addr != 0, rs2_rdata, 0))
# Change this submodule accordingly to test for different instructions(?)
m.submodules.insn_spec = insn_spec = rvfi_insn_add(self.RISCV_FORMAL_ILEN, self.RISCV_FORMAL_XLEN)
m.d.comb += insn_spec.rvfi_valid.eq(valid)
m.d.comb += insn_spec.rvfi_insn.eq(insn)
m.d.comb += insn_spec.rvfi_pc_rdata.eq(pc_rdata)
m.d.comb += insn_spec.rvfi_rs1_rdata.eq(rs1_rdata_or_zero)
m.d.comb += insn_spec.rvfi_rs2_rdata.eq(rs2_rdata_or_zero)
m.d.comb += insn_spec.rvfi_mem_rdata.eq(mem_rdata)
m.d.comb += spec_valid.eq(insn_spec.spec_valid)
m.d.comb += spec_trap.eq(insn_spec.spec_trap)
m.d.comb += spec_rs1_addr.eq(insn_spec.spec_rs1_addr)
m.d.comb += spec_rs2_addr.eq(insn_spec.spec_rs2_addr)
m.d.comb += spec_rd_addr.eq(insn_spec.spec_rd_addr)
m.d.comb += spec_rd_wdata.eq(insn_spec.spec_rd_wdata)
m.d.comb += spec_pc_wdata.eq(insn_spec.spec_pc_wdata)
m.d.comb += spec_mem_addr.eq(insn_spec.spec_mem_addr)
m.d.comb += spec_mem_rmask.eq(insn_spec.spec_mem_rmask)
m.d.comb += spec_mem_wmask.eq(insn_spec.spec_mem_wmask)
m.d.comb += spec_mem_wdata.eq(insn_spec.spec_mem_wdata)
insn_pma_x = Signal(1)
mem_pma_r = Signal(1)
mem_pma_w = Signal(1)
mem_log2len = Signal(2)
m.d.comb += mem_log2len.eq(Mux((spec_mem_rmask | spec_mem_wmask) & 0b11110000, 3, Mux((spec_mem_rmask | spec_mem_wmask) & 0b00001100, 2, Mux((spec_mem_rmask | spec_mem_wmask) & 0b00000010, 1, 0))))
m.d.comb += insn_pma_x.eq(1)
m.d.comb += mem_pma_r.eq(1)
m.d.comb += mem_pma_w.eq(1)
mem_access_fault = Signal(1)
m.d.comb += mem_access_fault.eq((spec_mem_rmask & ~mem_pma_r) | (spec_mem_wmask & ~mem_pma_w) | (spec_mem_rmask | spec_mem_wmask))
with m.If(~self.reset):
m.d.comb += Cover(spec_valid)
m.d.comb += Cover(spec_valid & ~trap)
m.d.comb += Cover(self.check & spec_valid)
m.d.comb += Cover(self.check & spec_valid & ~trap)
with m.If((~self.reset) & self.check):
m.d.comb += Assume(spec_valid)
with m.If((~insn_pma_x) | mem_access_fault):
m.d.comb += Assert(trap)
m.d.comb += Assert(rd_addr == 0)
m.d.comb += Assert(rd_wdata == 0)
m.d.comb += Assert(mem_wmask == 0)
with m.Else():
with m.If(rs1_addr == 0):
m.d.comb += Assert(rs1_rdata == 0)
with m.If(rs2_addr == 0):
m.d.comb += Assert(rs2_rdata == 0)
with m.If(~spec_trap):
with m.If(spec_rs1_addr != 0):
m.d.comb += Assert(spec_rs1_addr == rs1_addr)
with m.If(spec_rs2_addr != 0):
m.d.comb += Assert(spec_rs2_addr == rs2_addr)
m.d.comb += Assert(spec_rd_addr == rd_addr)
m.d.comb += Assert(spec_rd_wdata == rd_wdata)
m.d.comb += Assert(spec_pc_wdata == pc_wdata)
with m.If(spec_mem_wmask | spec_mem_rmask):
m.d.comb += Assert(spec_mem_addr == mem_addr)
for i in range(int(self.RISCV_FORMAL_XLEN // 8)):
with m.If(spec_mem_wmask[i]):
m.d.comb += Assert(mem_wmask[i])
m.d.comb += Assert(spec_mem_wdata[i*8:i*8+8] == mem_wdata[i*8:i*8+8])
with m.Elif(mem_wmask[i]):
m.d.comb += Assert(mem_rmask[i])
m.d.comb += Assert(mem_rdata[i*8:i*8+8] == mem_wdata[i*8:i*8+8])
with m.If(spec_mem_rmask[i]):
m.d.comb += Assert(mem_rmask[i])
m.d.comb += Assert(spec_trap == trap)
return m return m
test = rvfi_insn_check()
test.ports()
test.elaborate(platform=None)