arch/ppc/amiga/time.c

   1 #include <linux/config.h> /* CONFIG_HEARTBEAT */
   2 #include <linux/errno.h>
   3 #include <linux/sched.h>
   4 #include <linux/kernel.h>
   5 #include <linux/param.h>
   6 #include <linux/string.h>
   7 #include <linux/mm.h>
   8
   9 #include <asm/machdep.h>
  10 #include <asm/io.h>
  11
  12 #include <linux/timex.h>
  13
  14 unsigned long m68k_get_rtc_time(void)
  15 {
  16         unsigned int year, mon, day, hour, min, sec;
  17
  18         extern void arch_gettod(int *year, int *mon, int *day, int *hour,
  19                                 int *min, int *sec);
  20
  21         arch_gettod (&year, &mon, &day, &hour, &min, &sec);
  22
  23         if ((year += 1900) < 1970)
  24                 year += 100;
  25
  26         return mktime(year, mon, day, hour, min, sec);
  27 }
  28
  29 int m68k_set_rtc_time(unsigned long nowtime)
  30 {
  31   if (mach_set_clock_mmss)
  32     return mach_set_clock_mmss (nowtime);
  33   return -1;
  34 }
  35
  36 void apus_heartbeat (void)
  37 {
  38 #ifdef CONFIG_HEARTBEAT
  39         static unsigned cnt = 0, period = 0, dist = 0;
  40
  41         if (cnt == 0 || cnt == dist)
  42                 mach_heartbeat( 1 );
  43         else if (cnt == 7 || cnt == dist+7)
  44                 mach_heartbeat( 0 );
  45
  46         if (++cnt > period) {
  47                 cnt = 0;
  48                 /* The hyperbolic function below modifies the heartbeat period
  49                  * length in dependency of the current (5min) load. It goes
  50                  * through the points f(0)=126, f(1)=86, f(5)=51,
  51                  * f(inf)->30. */
  52                 period = ((672<<FSHIFT)/(5*avenrun[0]+(7<<FSHIFT))) + 30;
  53                 dist = period / 4;
  54         }
  55 #endif
  56         /* should be made smarter */
  57         ppc_md.heartbeat_count = 1;
  58 }