[fio.git] / arch / arch-s390.h

#ifndef ARCH_S390_H
#define ARCH_S390_H

#define FIO_ARCH	(arch_s390)

#define nop		asm volatile("nop" : : : "memory")
#define read_barrier()	asm volatile("bcr 15,0" : : : "memory")
#define write_barrier()	asm volatile("bcr 15,0" : : : "memory")

static inline unsigned long long get_cpu_clock(void)
{
	unsigned long long clk;

#ifdef CONFIG_S390_Z196_FACILITIES
	/*
	 * Fio needs monotonic (never lower), but not strict monotonic (never
	 * the same) so store clock fast is enough.
	 */
	__asm__ __volatile__("stckf %0" : "=Q" (clk) : : "cc");
#else
	__asm__ __volatile__("stck %0" : "=Q" (clk) : : "cc");
#endif
	return clk>>12;
}

#define ARCH_CPU_CLOCK_CYCLES_PER_USEC 1
#define ARCH_HAVE_CPU_CLOCK
#undef ARCH_CPU_CLOCK_WRAPS

#define ARCH_HAVE_INIT
extern bool tsc_reliable;
static inline int arch_init(char *envp[])
{
	tsc_reliable = true;
	return 0;
}

#endif
Commit	Line	Data
	1	#ifndef ARCH_S390_H
	2	#define ARCH_S390_H
	3
	4	#define FIO_ARCH (arch_s390)
	5
	6	#define nop asm volatile("nop" : : : "memory")
	7	#define read_barrier() asm volatile("bcr 15,0" : : : "memory")
	8	#define write_barrier() asm volatile("bcr 15,0" : : : "memory")
	9
	10	static inline unsigned long long get_cpu_clock(void)
	11	{
	12	unsigned long long clk;
	13
	14	#ifdef CONFIG_S390_Z196_FACILITIES
	15	/*
	16	* Fio needs monotonic (never lower), but not strict monotonic (never
	17	* the same) so store clock fast is enough.
	18	*/
	19	__asm__ __volatile__("stckf %0" : "=Q" (clk) : : "cc");
	20	#else
	21	__asm__ __volatile__("stck %0" : "=Q" (clk) : : "cc");
	22	#endif
	23	return clk>>12;
	24	}
	25
	26	#define ARCH_CPU_CLOCK_CYCLES_PER_USEC 1
	27	#define ARCH_HAVE_CPU_CLOCK
	28	#undef ARCH_CPU_CLOCK_WRAPS
	29
	30	#define ARCH_HAVE_INIT
	31	extern bool tsc_reliable;
	32	static inline int arch_init(char *envp[])
	33	{
	34	tsc_reliable = true;
	35	return 0;
	36	}
	37
	38	#endif