diff options
Diffstat (limited to 'cpu/s3c44b0')
| -rw-r--r-- | cpu/s3c44b0/interrupts.c | 23 |
1 files changed, 15 insertions, 8 deletions
diff --git a/cpu/s3c44b0/interrupts.c b/cpu/s3c44b0/interrupts.c index dea8118..5d2c13d 100644 --- a/cpu/s3c44b0/interrupts.c +++ b/cpu/s3c44b0/interrupts.c @@ -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; - - tmo += get_timer (0); + if (usec >= 1000) { + tmo = usec / 1000; + tmo *= CFG_HZ; + tmo /= 8; + } else { + tmo = usec * CFG_HZ; + tmo /= (1000*8); + } - reset_timer_masked (); + endtime = get_timer(0) + tmo; - while (get_timer_masked () < tmo) - /*NOP*/; + do { + ulong now = get_timer_masked (); + diff = endtime - now; + } while (diff >= 0); } |