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pc-bios: s390x: Consolidate timing functions into time.h

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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>
This commit is contained in:
Janosch Frank 2020-06-24 03:52:16 -04:00 • committed by Thomas Huth
parent 8c6cc7b9df
commit e70bc57ba0
7 changed files with 36 additions and 31 deletions
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23
pc-bios/s390-ccw/s390-time.h Normal file
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@ -0,0 +1,23 @@
#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