release/src-rt-6.x/linux/linux-2.6/arch/ppc/amiga/time.c

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