none/tests/s390x/stcke.c

   1 #include <stdio.h>
   2 #include<stdlib.h>
   3 #include<unistd.h>
   4
   5 union stcke {
   6         unsigned long buffer[2];
   7         struct reader {
   8                 char pad;
   9                 unsigned long long time;
  10                 int time2;
  11                 short program;
  12         } __attribute__ ((packed)) reader;
  13 };
  14
  15 int stcke(unsigned long *addr)
  16 {
  17
  18         int cc;
  19         asm volatile (  "stcke %0\n"
  20                         "ipm %1\n"
  21                         "srl %1, 28\n"
  22                       :"+Q" (*addr), "=d"(cc)::"cc");
  23
  24         return cc;
  25 }
  26
  27 unsigned long clockticks_in_msec(unsigned long b, unsigned long a)
  28 {
  29         return (b -a ) / 4096000UL;
  30 }
  31
  32 int main()
  33 {
  34         union stcke start, end;
  35         int cc;
  36
  37         cc = stcke(start.buffer);
  38         if (cc)
  39                 printf("cc != 0!\n");
  40
  41         sleep(1);
  42         cc = stcke(end.buffer);
  43         if (cc)
  44                 printf("cc != 0!\n");
  45
  46         unsigned long c = clockticks_in_msec(end.reader.time,
  47                                              start.reader.time);
  48
  49         if (c >= 1000 && c < 1500)
  50                 printf("OK.....Testcase passed\n");
  51         else
  52                 printf("FAILED.....Testcase failed\n");
  53
  54         return 0;
  55
  56 }