qemu/pc-bios/s390-ccw/s390-time.h
Janosch Frank e70bc57ba0 pc-bios: s390x: Consolidate timing functions into time.h
Let's consolidate timing related functions into one header.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Acked-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Message-Id: <20200624075226.92728-3-frankja@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2020-07-02 09:59:24 +02:00

24 lines
360 B
C

#ifndef TIME_H
#define TIME_H
static inline u64 get_clock(void)
{
u64 r;
asm volatile("stck %0" : "=Q" (r) : : "cc");
return r;
}
static inline u64 get_time_ms(void)
{
/* Bit 51 is incremented each microsecond */
return (get_clock() >> 12) / 1000;
}
static inline u64 get_time_seconds(void)
{
return get_time_ms() / 1000;
}
#endif