arch/m68k-amiga/timer/getuptime.c

   1 /*
   2     Copyright © 2018-2019, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: GetUpTime() - Get time since machine was powered on.
   6     Lang: english
   7 */
   8 #include <proto/exec.h>
   9
  10 #define DEBUG 0
  11 #include <aros/debug.h>
  12
  13 #include <timer_intern.h>
  14
  15 #include <devices/timer.h>
  16 #include <proto/timer.h>
  17
  18 /* See rom/timer/getuptime.c for documentation */
  19
  20 AROS_LH1(void, GetUpTime,
  21     AROS_LHA(struct timeval *, dest, A0),
  22     struct Device *, TimerBase, 12, Timer)
  23 {
  24     AROS_LIBFUNC_INIT
  25
  26     struct TimerBase *timerBase = (struct TimerBase *)TimerBase;
  27     ULONG tb_eclock_to_usec;
  28
  29     Disable();
  30     tb_eclock_to_usec = timerBase->tb_eclock_to_usec + GetEClock(timerBase);
  31     Enable();
  32     dest->tv_secs = timerBase->tb_Elapsed.tv_secs;
  33     dest->tv_micro = (ULONG)(((long long)tb_eclock_to_usec * timerBase->tb_eclock_micro_mult) >> 16);
  34
  35     // can only overflow once, e-clock interrupts happen more than once a second
  36     if (dest->tv_micro >= 1000000) {
  37         dest->tv_micro -= 1000000;
  38         dest->tv_secs++;
  39     }
  40     D(bug("uptime=%d/%d\n", dest->tv_secs, dest->tv_micro));
  41
  42     AROS_LIBFUNC_EXIT
  43 } /* GetUpTime */