[MIPS] SMP: Get smp_tune_scheduling to do something useful.

EXPORT_SYMBOL(phys_cpu_present_map);

EXPORT_SYMBOL(phys_cpu_present_map);

EXPORT_SYMBOL(cpu_online_map);

EXPORT_SYMBOL(cpu_online_map);

/* This happens early in bootup, can't really do it better */

static void smp_tune_scheduling (void)

static void smp_tune_scheduling (void)

{

{

	struct cache_desc *cd = &current_cpu_data.scache;

	struct cache_desc *cd = &current_cpu_data.scache;

	unsigned long cachesize;       /* kB   */

	unsigned long cachesize = cd->linesz * cd->sets * cd->ways;

	unsigned long cpu_khz;

	/*

	if (cachesize > max_cache_size)

	 * Crude estimate until we actually meassure ...

		max_cache_size = cachesize;

	 */

	cpu_khz = loops_per_jiffy * 2 * HZ / 1000;

	/*

	 * Rough estimation for SMP scheduling, this is the number of

	 * cycles it takes for a fully memory-limited process to flush

	 * the SMP-local cache.

	 *

	 * (For a P5 this pretty much means we will choose another idle

	 *  CPU almost always at wakeup time (this is due to the small

	 *  L1 cache), on PIIs it's around 50-100 usecs, depending on

	 *  the cache size)

	 */

	if (!cpu_khz)

		return;

	cachesize = cd->linesz * cd->sets * cd->ways;

}

}

extern void __init calibrate_delay(void);

extern void __init calibrate_delay(void);