#ifndef ARCH_S390_H
#define ARCH_S390_H
-#define ARCH (arch_s390)
+#define FIO_ARCH (arch_s390)
#ifndef __NR_ioprio_set
#define __NR_ioprio_set 282
#define read_barrier() asm volatile("bcr 15,0" : : : "memory")
#define write_barrier() asm volatile("bcr 15,0" : : : "memory")
-typedef struct {
- volatile unsigned int lock;
-} spinlock_t;
-
-static inline int
-_raw_compare_and_swap(volatile unsigned int *lock,
- unsigned int old, unsigned int new)
+static inline unsigned long long get_cpu_clock(void)
{
- __asm__ __volatile__(
- " cs %0,%3,0(%4)"
- : "=d" (old), "=m" (*lock)
- : "0" (old), "d" (new), "a" (lock), "m" (*lock)
- : "cc", "memory" );
+ unsigned long long clk;
- return old;
+ __asm__ __volatile__("stck %0" : "=Q" (clk) : : "cc");
+ return clk;
}
-static inline void spin_lock(spinlock_t *lock)
+#define ARCH_HAVE_INIT
+extern int tsc_reliable;
+static inline int arch_init(char *envp[])
{
- if (!_raw_compare_and_swap(&lock->lock, 0, 0x80000000))
- return;
-
- while (1) {
- if (lock->lock)
- continue;
- if (!_raw_compare_and_swap(&lock->lock, 0, 0x80000000))
- break;
- }
+ tsc_reliable = 1;
+ return 0;
}
-static inline void spin_unlock(spinlock_t *lock)
-{
- _raw_compare_and_swap(&lock->lock, 0x80000000, 0);
-}
+#define ARCH_HAVE_CPU_CLOCK
#endif