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Fix timer code for ARM systems: make sure that udelay() does not

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reset timers so it's save to use udelay() in timeout code.
This commit is contained in:
wdenk
2005-04-04 12:08:28 +00:00
parent 50712ba16e
commit 101e8dfa2a
14 changed files with 140 additions and 80 deletions
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23
cpu/s3c44b0/interrupts.c
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@@ -219,15 +219,22 @@ ulong get_timer_masked (void)
void udelay_masked (unsigned long usec)
{
ulong tmo;
ulong endtime;
signed long diff;
tmo = usec / 1000;
tmo *= CFG_HZ;
tmo /= 8;
if (usec >= 1000) {
tmo = usec / 1000;
tmo *= CFG_HZ;
tmo /= 8;
} else {
tmo = usec * CFG_HZ;
tmo /= (1000*8);
}
tmo += get_timer (0);
endtime = get_timer(0) + tmo;
reset_timer_masked ();
while (get_timer_masked () < tmo)
/*NOP*/;
do {
ulong now = get_timer_masked ();
diff = endtime - now;
} while (diff >= 0);
}