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 
get_cpu_clock(void)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;
arch_init(char * envp[])32 static inline int arch_init(char *envp[])
33 {
34 	tsc_reliable = true;
35 	return 0;
36 }
37 
38 #endif
39