src/soc/TLB/ariane/test/test_tlb_content.py

   1 from nmigen.compat.sim import run_simulation
   2
   3 from soc.TLB.ariane.tlb_content import TLBContent
   4 from soc.TestUtil.test_helper import assert_op, assert_eq
   5
   6
   7 def update(dut, a, t, g, m):
   8     yield dut.replace_en_i.eq(1)
   9     yield dut.update_i.valid.eq(1)
  10     yield dut.update_i.is_512G.eq(t)
  11     yield dut.update_i.is_1G.eq(g)
  12     yield dut.update_i.is_2M.eq(m)
  13     yield dut.update_i.vpn.eq(a)
  14     yield
  15     yield
  16
  17
  18 def check_hit(dut, hit, pagesize):
  19     hit_d = yield dut.lu_hit_o
  20     assert_eq("hit", hit_d, hit)
  21
  22     if(hit):
  23         if(pagesize == "t"):
  24             hitp = yield dut.lu_is_512G_o
  25             assert_eq("lu_is_512G_o", hitp, 1)
  26         elif(pagesize == "g"):
  27             hitp = yield dut.lu_is_1G_o
  28             assert_eq("lu_is_1G_o", hitp, 1)
  29         elif(pagesize == "m"):
  30             hitp = yield dut.lu_is_2M_o
  31             assert_eq("lu_is_2M_o", hitp, 1)
  32
  33
  34 def addr(a, b, c, d):
  35     return a | b << 9 | c << 18 | d << 27
  36
  37
  38 def tbench(dut):
  39     yield dut.vpn0.eq(0x0A)
  40     yield dut.vpn1.eq(0x0B)
  41     yield dut.vpn2.eq(0x0C)
  42     yield dut.vpn3.eq(0x0D)
  43     yield from update(dut, addr(0xFF, 0xFF, 0xFF, 0x0D), 1, 0, 0)
  44     yield from check_hit(dut, 1, "t")
  45
  46     yield from update(dut, addr(0xFF, 0xFF, 0x0C, 0x0D), 0, 1, 0)
  47     yield from check_hit(dut, 1, "g")
  48
  49     yield from update(dut, addr(0xFF, 0x0B, 0x0C, 0x0D), 0, 0, 1)
  50     yield from check_hit(dut, 1, "m")
  51
  52     yield from update(dut, addr(0x0A, 0x0B, 0x0C, 0x0D), 0, 0, 0)
  53     yield from check_hit(dut, 1, "")
  54
  55     yield from update(dut, addr(0xAA, 0xBB, 0xCC, 0xDD), 0, 0, 0)
  56     yield from check_hit(dut, 0, "miss")
  57
  58
  59 if __name__ == "__main__":
  60     dut = TLBContent(4, 4)
  61     #
  62     run_simulation(dut, tbench(dut), vcd_name="test_tlb_content.vcd")
  63     print("TLBContent Unit Test Success")