tools/testing/selftests/powerpc/pmu/ebb/ebb_lmr_regs.c

   1 /*
   2  * Copyright 2016, Jack Miller, IBM Corp.
   3  * Licensed under GPLv2.
   4  */
   5
   6 #include <stdlib.h>
   7 #include <stdio.h>
   8 #include <unistd.h>
   9
  10 #include "ebb.h"
  11 #include "ebb_lmr.h"
  12
  13 #define CHECKS 10000
  14
  15 int ebb_lmr_regs(void)
  16 {
  17         int i;
  18
  19         SKIP_IF(!lmr_is_supported());
  20
  21         ebb_global_enable();
  22
  23         for (i = 0; i < CHECKS; i++) {
  24                 mtspr(SPRN_LMRR, i << 25);      // skip size and rsvd bits
  25                 mtspr(SPRN_LMSER, i);
  26
  27                 FAIL_IF(mfspr(SPRN_LMRR) != (i << 25));
  28                 FAIL_IF(mfspr(SPRN_LMSER) != i);
  29         }
  30
  31         return 0;
  32 }
  33
  34 int main(void)
  35 {
  36         return test_harness(ebb_lmr_regs, "ebb_lmr_regs");
  37 }