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 int tsc_reliable; 32 static inline int arch_init(char *envp[]) 33 { 34 tsc_reliable = 1; 35 return 0; 36 } 37 38 #endif 39
