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

   1 import sys
   2 sys.path.append("../src")
   3 sys.path.append("../../../TestUtil")
   4
   5 from nmigen.compat.sim import run_simulation
   6
   7 from TLB.ariane.tlb_content import TLBContent
   8 from TestUtil.test_helper import assert_op, assert_eq
   9
  10 def update(dut,a,t,g,m):
  11     yield dut.replace_en_i.eq(1)
  12     yield dut.update_i.valid.eq(1)
  13     yield dut.update_i.is_512G.eq(t)
  14     yield dut.update_i.is_1G.eq(g)
  15     yield dut.update_i.is_2M.eq(m)
  16     yield dut.update_i.vpn.eq(a)
  17     yield
  18     yield
  19
  20 def check_hit(dut,hit,pagesize):
  21     hit_d = yield dut.lu_hit_o
  22     assert_eq("hit", hit_d, hit)
  23
  24     if(hit):
  25         if(pagesize=="t"):
  26             hitp = yield dut.lu_is_512G_o
  27             assert_eq("lu_is_512G_o", hitp, 1)
  28         elif(pagesize=="g"):
  29             hitp = yield dut.lu_is_1G_o
  30             assert_eq("lu_is_1G_o", hitp, 1)
  31         elif(pagesize=="m"):
  32             hitp = yield dut.lu_is_2M_o
  33             assert_eq("lu_is_2M_o", hitp, 1)
  34
  35 def addr(a,b,c,d):
  36     return a | b << 9 | c << 18 | d << 27
  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")