diff options
Diffstat (limited to 'cpu/arm1136/interrupts.c')
| -rw-r--r-- | cpu/arm1136/interrupts.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/cpu/arm1136/interrupts.c b/cpu/arm1136/interrupts.c index c80d9a5..23236dc 100644 --- a/cpu/arm1136/interrupts.c +++ b/cpu/arm1136/interrupts.c @@ -254,6 +254,8 @@ ulong get_timer_masked (void) void udelay_masked (unsigned long usec) { ulong tmo; + ulong endtime; + signed long diff; if (usec >= 1000) { /* if "big" number, spread normalization to seconds */ tmo = usec / 1000; /* start to normalize for usec to ticks per sec */ @@ -263,9 +265,12 @@ void udelay_masked (unsigned long usec) tmo = usec * CFG_HZ; tmo /= (1000*1000); } - reset_timer_masked (); /* set "advancing" timestamp to 0, set lastinc vaule */ - while (get_timer_masked () < tmo) /* wait for time stamp to overtake tick number.*/ - /* NOP */; + endtime = get_timer_masked () + tmo; + + do { + ulong now = get_timer_masked (); + diff = endtime - now; + } while (diff >= 0); } /* |