- next_tick = cpu_data[cpuid].it_value;
- now = mfctl(16); /* Read the hardware interval timer. */
-
- prev_tick = next_tick - cpt;
-
- /* Assume Scenario 1: "now" is later than prev_tick. */
- elapsed_cycles = now - prev_tick;
-
-/* aproximate HZ with shifts. Intended math is "(elapsed/clocktick) > HZ" */
-#if HZ == 1000
- if (elapsed_cycles > (cpt << 10) )
-#elif HZ == 250
- if (elapsed_cycles > (cpt << 8) )
-#elif HZ == 100
- if (elapsed_cycles > (cpt << 7) )
-#else
-#warn WTF is HZ set to anyway?
- if (elapsed_cycles > (HZ * cpt) )
-#endif
- {
- /* Scenario 3: clock ticks are missing. */
- printk (KERN_CRIT "gettimeoffset(CPU %ld): missing %ld ticks!"
- " cycles %lX prev/now/next %lX/%lX/%lX clock %lX\n",
- cpuid, elapsed_cycles / cpt,
- elapsed_cycles, prev_tick, now, next_tick, cpt);
- }
-
- /* FIXME: Can we improve the precision? Not with PAGE0. */
- usec = (elapsed_cycles * 10000) / PAGE0->mem_10msec;
- return usec;
-#else
- return 0;
-#endif
-}
-
-void
-do_gettimeofday (struct timeval *tv)