1 #ifndef ARCH_S390_H
2 #define ARCH_S390_H
3 
4 #define FIO_ARCH	(arch_s390)
5 
6 #ifndef __NR_ioprio_set
7 #define __NR_ioprio_set		282
8 #define __NR_ioprio_get		283
9 #endif
10 
11 #ifndef __NR_fadvise64
12 #define __NR_fadvise64		253
13 #endif
14 
15 #ifndef __NR_sys_splice
16 #define __NR_sys_splice		306
17 #define __NR_sys_tee		308
18 #define __NR_sys_vmsplice	309
19 #endif
20 
21 #define nop		asm volatile("nop" : : : "memory")
22 #define read_barrier()	asm volatile("bcr 15,0" : : : "memory")
23 #define write_barrier()	asm volatile("bcr 15,0" : : : "memory")
24 
get_cpu_clock(void)25 static inline unsigned long long get_cpu_clock(void)
26 {
27 	unsigned long long clk;
28 
29 #ifdef CONFIG_S390_Z196_FACILITIES
30 	/*
31 	 * Fio needs monotonic (never lower), but not strict monotonic (never
32 	 * the same) so store clock fast is enough.
33 	 */
34 	__asm__ __volatile__("stckf %0" : "=Q" (clk) : : "cc");
35 #else
36 	__asm__ __volatile__("stck %0" : "=Q" (clk) : : "cc");
37 #endif
38 	return clk>>12;
39 }
40 
41 #define ARCH_CPU_CLOCK_CYCLES_PER_USEC 1
42 #define ARCH_HAVE_CPU_CLOCK
43 #undef ARCH_CPU_CLOCK_WRAPS
44 
45 #define ARCH_HAVE_INIT
46 extern int tsc_reliable;
arch_init(char * envp[])47 static inline int arch_init(char *envp[])
48 {
49 	tsc_reliable = 1;
50 	return 0;
51 }
52 
53 #endif
54