1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
|
#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
|
