diff options
Diffstat (limited to 'arch/tile/lib/delay.c')
| -rw-r--r-- | arch/tile/lib/delay.c | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/arch/tile/lib/delay.c b/arch/tile/lib/delay.c index 5801b03c13e..cdacdd11d36 100644 --- a/arch/tile/lib/delay.c +++ b/arch/tile/lib/delay.c @@ -15,20 +15,31 @@ #include <linux/module.h> #include <linux/delay.h> #include <linux/thread_info.h> -#include <asm/fixmap.h> -#include <hv/hypervisor.h> +#include <asm/timex.h> void __udelay(unsigned long usecs) { - hv_nanosleep(usecs * 1000); + if (usecs > ULONG_MAX / 1000) { + WARN_ON_ONCE(usecs > ULONG_MAX / 1000); + usecs = ULONG_MAX / 1000; + } + __ndelay(usecs * 1000); } EXPORT_SYMBOL(__udelay); void __ndelay(unsigned long nsecs) { - hv_nanosleep(nsecs); + cycles_t target = get_cycles(); + target += ns2cycles(nsecs); + while (get_cycles() < target) + cpu_relax(); } EXPORT_SYMBOL(__ndelay); -/* FIXME: should be declared in a header somewhere. */ +void __delay(unsigned long cycles) +{ + cycles_t target = get_cycles() + cycles; + while (get_cycles() < target) + cpu_relax(); +} EXPORT_SYMBOL(__delay); |