[U-Boot] the result of get_timer(0) or get_ticks() does not change

Hi all,

I change some codes in u boot, and I want to calculate the time So I write codes like follows: Ulong begin = get_ticks(); for (i = 0; i < 100; i ++) { udelay(1000); } Ulong end = get_ticks();

But the value of begin and end are always same? I also tried get_timer(0).

Does anyone have uncounted this problem?

Thanks