isa/rv32si/timer.S

   1 # See LICENSE for license details.
   2
   3 #*****************************************************************************
   4 # timer.S
   5 #-----------------------------------------------------------------------------
   6 #
   7 # Test timer interrupt.
   8 #
   9
  10 #include "riscv_test.h"
  11 #include "test_macros.h"
  12
  13 RVTEST_RV32S
  14 RVTEST_CODE_BEGIN
  15
  16   la t0, evec
  17   csrw evec, t0
  18
  19   csrr t0, count
  20   add t0, t0, 1000
  21   csrw compare, t0
  22
  23   li t1, 1<<23
  24   csrs status, t1 # turn on timer IRQ 7
  25   csrsi status, 4 # enable interrupts
  26
  27   li TESTNUM, 2
  28   li a0,10000
  29 loop:
  30   div x0, x0, x0
  31   addi a0, a0, -1
  32   bne a0, x0, loop
  33   j fail # assumption is that you can't divide in one cycle
  34
  35   TEST_PASSFAIL
  36
  37 evec:
  38   li TESTNUM, 3
  39   li t1, 0x80000000|IRQ_TIMER
  40   csrr t0, cause
  41   bne t0, t1, fail
  42   j pass
  43
  44 RVTEST_CODE_END
  45
  46   .data
  47 RVTEST_DATA_BEGIN
  48
  49   TEST_DATA
  50
  51 RVTEST_DATA_END