38 lines
864 B
C
38 lines
864 B
C
#ifndef ARCH_S390_H
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#define ARCH_S390_H
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#define FIO_ARCH (arch_s390)
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#define nop asm volatile("nop" : : : "memory")
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#define read_barrier() asm volatile("bcr 15,0" : : : "memory")
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#define write_barrier() asm volatile("bcr 15,0" : : : "memory")
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static inline unsigned long long get_cpu_clock(void)
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{
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unsigned long long clk;
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#ifdef CONFIG_S390_Z196_FACILITIES
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/*
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* Fio needs monotonic (never lower), but not strict monotonic (never
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* the same) so store clock fast is enough.
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*/
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__asm__ __volatile__("stckf %0" : "=Q" (clk) : : "cc");
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#else
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__asm__ __volatile__("stck %0" : "=Q" (clk) : : "cc");
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#endif
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return clk>>12;
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}
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#define ARCH_CPU_CLOCK_CYCLES_PER_USEC 1
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#define ARCH_HAVE_CPU_CLOCK
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#undef ARCH_CPU_CLOCK_WRAPS
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#define ARCH_HAVE_INIT
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extern int tsc_reliable;
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static inline int arch_init(char *envp[])
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{
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tsc_reliable = 1;
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return 0;
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}
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#endif
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