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_RV64M
  14 RVTEST_CODE_BEGIN
  15
  16   # enable interrupts
  17   csrs mstatus, MSTATUS_IE
  18
  19   # get a unique core id
  20   la a0, coreid
  21   li a1, 1
  22   amoadd.w a2, a1, (a0)
  23
  24   # for now, only run this on core 0
  25   1:li a3, 1
  26   bgeu a2, a3, 1b
  27
  28   # wait for all cores to boot
  29   1: lw a1, (a0)
  30   bltu a1, a3, 1b
  31
  32   # IPI dominoes
  33   csrr a0, hartid
  34   1: bnez a0, 1b
  35   add a0, a0, 1
  36   rem a0, a0, a3
  37   csrw send_ipi, a0
  38   1: j 1b
  39
  40 mtvec:
  41   csrr a0, hartid
  42   bnez a0, 2f
  43   RVTEST_PASS
  44
  45   TEST_PASSFAIL
  46
  47   2: add a0, a0, 1
  48   rem a0, a0, a3
  49   csrw send_ipi, a0
  50   1: j 1b
  51
  52 RVTEST_CODE_END
  53
  54   .data
  55 RVTEST_DATA_BEGIN
  56
  57   TEST_DATA
  58
  59 coreid: .word 0
  60 foo: .word 0
  61
  62 RVTEST_DATA_END