94c12cc7d1
Major cleanup of all s390 inline assemblies. They now have a common coding style. Quite a few have been shortened, mainly by using register asm variables. Use of the EX_TABLE macro helps as well. The atomic ops, bit ops and locking inlines new use the Q-constraint if a newer gcc is used. That results in slightly better code. Thanks to Christian Borntraeger for proof reading the changes. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
36 lines
758 B
C
36 lines
758 B
C
/*
|
|
* include/asm-s390/timex.h
|
|
*
|
|
* S390 version
|
|
* Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
|
|
*
|
|
* Derived from "include/asm-i386/timex.h"
|
|
* Copyright (C) 1992, Linus Torvalds
|
|
*/
|
|
|
|
#ifndef _ASM_S390_TIMEX_H
|
|
#define _ASM_S390_TIMEX_H
|
|
|
|
#define CLOCK_TICK_RATE 1193180 /* Underlying HZ */
|
|
|
|
typedef unsigned long long cycles_t;
|
|
|
|
static inline unsigned long long get_clock (void)
|
|
{
|
|
unsigned long long clk;
|
|
|
|
#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 2)
|
|
asm volatile("stck %0" : "=Q" (clk) : : "cc");
|
|
#else /* __GNUC__ */
|
|
asm volatile("stck 0(%1)" : "=m" (clk) : "a" (&clk) : "cc");
|
|
#endif /* __GNUC__ */
|
|
return clk;
|
|
}
|
|
|
|
static inline cycles_t get_cycles(void)
|
|
{
|
|
return (cycles_t) get_clock() >> 2;
|
|
}
|
|
|
|
#endif
|