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>
35 lines
758 B
C
35 lines
758 B
C
/*
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* include/asm-s390/timex.h
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*
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* S390 version
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* Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
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*
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* Derived from "include/asm-i386/timex.h"
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* Copyright (C) 1992, Linus Torvalds
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*/
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#ifndef _ASM_S390_TIMEX_H
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#define _ASM_S390_TIMEX_H
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#define CLOCK_TICK_RATE 1193180 /* Underlying HZ */
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typedef unsigned long long cycles_t;
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static inline unsigned long long get_clock (void)
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{
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unsigned long long clk;
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#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 2)
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asm volatile("stck %0" : "=Q" (clk) : : "cc");
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#else /* __GNUC__ */
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asm volatile("stck 0(%1)" : "=m" (clk) : "a" (&clk) : "cc");
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#endif /* __GNUC__ */
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return clk;
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}
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static inline cycles_t get_cycles(void)
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{
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return (cycles_t) get_clock() >> 2;
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}
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#endif
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