C++ (Cpp) get_8254_timer_count Examples

Example #1

File: apic.c Project: Dronevery/JetsonTK1-kernel

/* next tick in 8254 can be caught by catching timer wraparound */
static void __init wait_8254_wraparound(void)
{
	unsigned int curr_count, prev_count;

	curr_count = get_8254_timer_count();
	do {
		prev_count = curr_count;
		curr_count = get_8254_timer_count();

		/* workaround for broken Mercury/Neptune */
		if (prev_count >= curr_count + 0x100)
			curr_count = get_8254_timer_count();

	} while (prev_count >= curr_count);
}

Example #2

File: apic.c Project: BackupTheBerlios/tuxap

/* next tick in 8254 can be caught by catching timer wraparound */
static void __init wait_8254_wraparound(void)
{
	unsigned int curr_count, prev_count=~0;
	int delta;

	curr_count = get_8254_timer_count();

	do {
		prev_count = curr_count;
		curr_count = get_8254_timer_count();
		delta = curr_count-prev_count;

	/*
	 * This limit for delta seems arbitrary, but it isn't, it's
	 * slightly above the level of error a buggy Mercury/Neptune
	 * chipset timer can cause.
	 */

	} while (delta < 300);
}