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[MIPS] lib_mips/time.c: Fix udelay

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What we have to do is just to wait for given micro-seconds. No need to
take into account current time, get_timer and CFG_HZ.

Signed-off-by: Shinya Kuribayashi <skuribay@ruby.dti.ne.jp>
This commit is contained in:
Shinya Kuribayashi 2008-06-05 22:29:00 +09:00
parent c7e38e413a
commit 199e4f657c
1 changed files with 4 additions and 5 deletions
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9
lib_mips/time.c
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@ -51,13 +51,12 @@ void set_timer(ulong t)
write_c0_count(t);
}
void udelay (unsigned long usec)
void udelay(unsigned long usec)
{
ulong tmo;
ulong start = get_timer(0);
unsigned int tmo;
tmo = usec * (CFG_HZ / 1000000);
while ((ulong)((read_c0_count() - start)) < tmo)
tmo = read_c0_count() + (usec * (CFG_MIPS_TIMER_FREQ / 1000000));
while ((tmo - read_c0_count()) < 0x7fffffff)
/*NOP*/;
}