| #ifndef __ASM_METAG_CMPXCHG_LOCK1_H |
| #define __ASM_METAG_CMPXCHG_LOCK1_H |
| |
| #include <asm/global_lock.h> |
| |
| /* Use LOCK2 as these have to be atomic w.r.t. ordinary accesses. */ |
| |
| static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val) |
| { |
| unsigned long flags, retval; |
| |
| __global_lock2(flags); |
| fence(); |
| retval = *m; |
| *m = val; |
| __global_unlock2(flags); |
| return retval; |
| } |
| |
| static inline unsigned long xchg_u8(volatile u8 *m, unsigned long val) |
| { |
| unsigned long flags, retval; |
| |
| __global_lock2(flags); |
| fence(); |
| retval = *m; |
| *m = val & 0xff; |
| __global_unlock2(flags); |
| return retval; |
| } |
| |
| static inline unsigned long __cmpxchg_u32(volatile int *m, unsigned long old, |
| unsigned long new) |
| { |
| __u32 retval; |
| unsigned long flags; |
| |
| __global_lock2(flags); |
| retval = *m; |
| if (retval == old) { |
| fence(); |
| *m = new; |
| } |
| __global_unlock2(flags); |
| return retval; |
| } |
| |
| #endif /* __ASM_METAG_CMPXCHG_LOCK1_H */ |
