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   mtpcr a0, cr3
  17   mtpcr x0, cr9
  18   mfpcr a0, cr0
  19   li a1, 0x00ff0001
  20   or a0, a0, a1
  21   mtpcr a0, cr0
  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   mfpcr a0, cr10
  33   1: bnez a0, 1b
  34   add a0, a0, 1
  35   rem a0, a0, a3
  36   mtpcr a0, cr8
  37   1: b 1b
  38
  39   handler:
  40   mfpcr a0, cr10
  41   bnez a0, 2f
  42   RVTEST_PASS
  43
  44   TEST_PASSFAIL
  45
  46   2: add a0, a0, 1
  47   rem a0, a0, a3
  48   mtpcr a0, cr8
  49   1: b 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