isa/rv64si/ipi.S

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