Signed-off-by: Nobuhiro Iwamatsu <[email protected]> --- arch/sh/lib/time.c | 20 ++++++++++++++++++-- 1 files changed, 18 insertions(+), 2 deletions(-)
diff --git a/arch/sh/lib/time.c b/arch/sh/lib/time.c index 9a8f89a..bc1656f 100644 --- a/arch/sh/lib/time.c +++ b/arch/sh/lib/time.c @@ -2,7 +2,7 @@ * (C) Copyright 2009 * Jean-Christophe PLAGNIOL-VILLARD <[email protected]> * - * (C) Copyright 2007-2008 + * (C) Copyright 2007-2010 * Nobobuhiro Iwamatsu <[email protected]> * * (C) Copyright 2003 @@ -36,6 +36,8 @@ #define TMU_MAX_COUNTER (~0UL) static ulong timer_freq; +static unsigned long last_tcnt; +static unsigned long long overflow_ticks; static inline unsigned long long tick_to_time(unsigned long long tick) { @@ -97,12 +99,26 @@ int timer_init (void) tmu_timer_stop(0); tmu_timer_start(0); + last_tcnt = 0; + overflow_ticks = 0; + return 0; } unsigned long long get_ticks (void) { - return 0 - readl(TCNT0); + unsigned long tcnt = 0 - readl(TCNT0); + unsigned long ticks; + + if (last_tcnt > tcnt) { /* overflow */ + overflow_ticks++; + ticks = (0xffffffff - last_tcnt) + tcnt; + } else { + ticks = tcnt; + } + last_tcnt = tcnt; + + return (overflow_ticks << 32) | tcnt; } void __udelay (unsigned long usec) -- 1.7.1 _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
