isa/rv64si/ipi.S

   1 # See LICENSE for license details.
   2
   3 #*****************************************************************************
   4 # ipi.S
   5 #-----------------------------------------------------------------------------
   6 #
   7 # Test interprocessor interrupts.
   8 #
   9
  10 #include "riscv_test.h"
  11 #include "test_macros.h"
  12
  13 RVTEST_RV64S
  14 RVTEST_CODE_BEGIN
  15
  16   # clear pending IPIs then enable interrupts
  17   la a0, handler
  18   csrw evec, a0
  19   csrw clear_ipi, x0
  20   li a0, SR_EI | (1 << (IRQ_IPI + SR_IM_SHIFT))
  21   csrs status, a0
  22
  23   # wait for all cores to boot
  24   la a0, coreid
  25   li a1, 1
  26   amoadd.w x0, a1, 0(a0)
  27   lw a3, 4(x0)
  28   1: lw a1, 0(a0)
  29   blt a1, a3, 1b
  30
  31   # IPI dominoes
  32   csrr a0, hartid
  33   1: bnez a0, 1b
  34   add a0, a0, 1
  35   rem a0, a0, a3
  36   csrw send_ipi, a0
  37   1: j 1b
  38
  39   handler:
  40   csrr a0, hartid
  41   bnez a0, 2f
  42   RVTEST_PASS
  43
  44   TEST_PASSFAIL
  45
  46   2: add a0, a0, 1
  47   rem a0, a0, a3
  48   csrw send_ipi, a0
  49   1: j 1b
  50
  51 RVTEST_CODE_END
  52
  53   .data
  54 RVTEST_DATA_BEGIN
  55
  56   TEST_DATA
  57
  58 coreid: .word 0
  59 foo: .word 0
  60
  61 RVTEST_DATA_END