| 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 |