1 #ifndef __ARCH_H8300_ATOMIC__
2 #define __ARCH_H8300_ATOMIC__
4 #include <linux/types.h>
7 * Atomic operations that C can't guarantee us. Useful for
8 * resource counting etc..
11 #define ATOMIC_INIT(i) { (i) }
13 #define atomic_read(v) (*(volatile int *)&(v)->counter)
14 #define atomic_set(v, i) (((v)->counter) = i)
16 #include <asm/system.h>
17 #include <linux/kernel.h>
19 static __inline__
int atomic_add_return(int i
, atomic_t
*v
)
23 local_irq_save(flags
);
24 ret
= v
->counter
+= i
;
25 local_irq_restore(flags
);
29 #define atomic_add(i, v) atomic_add_return(i, v)
30 #define atomic_add_negative(a, v) (atomic_add_return((a), (v)) < 0)
32 static __inline__
int atomic_sub_return(int i
, atomic_t
*v
)
36 local_irq_save(flags
);
37 ret
= v
->counter
-= i
;
38 local_irq_restore(flags
);
42 #define atomic_sub(i, v) atomic_sub_return(i, v)
43 #define atomic_sub_and_test(i,v) (atomic_sub_return(i, v) == 0)
45 static __inline__
int atomic_inc_return(atomic_t
*v
)
49 local_irq_save(flags
);
52 local_irq_restore(flags
);
56 #define atomic_inc(v) atomic_inc_return(v)
59 * atomic_inc_and_test - increment and test
60 * @v: pointer of type atomic_t
62 * Atomically increments @v by 1
63 * and returns true if the result is zero, or false for all
66 #define atomic_inc_and_test(v) (atomic_inc_return(v) == 0)
68 static __inline__
int atomic_dec_return(atomic_t
*v
)
72 local_irq_save(flags
);
75 local_irq_restore(flags
);
79 #define atomic_dec(v) atomic_dec_return(v)
81 static __inline__
int atomic_dec_and_test(atomic_t
*v
)
85 local_irq_save(flags
);
88 local_irq_restore(flags
);
92 static inline int atomic_cmpxchg(atomic_t
*v
, int old
, int new)
97 local_irq_save(flags
);
99 if (likely(ret
== old
))
101 local_irq_restore(flags
);
105 #define atomic_xchg(v, new) (xchg(&((v)->counter), new))
107 static inline int atomic_add_unless(atomic_t
*v
, int a
, int u
)
112 local_irq_save(flags
);
116 local_irq_restore(flags
);
119 #define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
121 static __inline__
void atomic_clear_mask(unsigned long mask
, unsigned long *v
)
123 __asm__
__volatile__("stc ccr,r1l\n\t"
129 : "=m" (*v
) : "g" (~(mask
)) :"er0","er1");
132 static __inline__
void atomic_set_mask(unsigned long mask
, unsigned long *v
)
134 __asm__
__volatile__("stc ccr,r1l\n\t"
140 : "=m" (*v
) : "g" (mask
) :"er0","er1");
143 /* Atomic operations are already serializing */
144 #define smp_mb__before_atomic_dec() barrier()
145 #define smp_mb__after_atomic_dec() barrier()
146 #define smp_mb__before_atomic_inc() barrier()
147 #define smp_mb__after_atomic_inc() barrier()
149 #include <asm-generic/atomic-long.h>
150 #endif /* __ARCH_H8300_ATOMIC __ */
This page took 0.068129 seconds and 6 git commands to generate.