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#ifndef __ARCH_H8300_ATOMIC__
#define __ARCH_H8300_ATOMIC__
#include <linux/types.h>
#include <asm/cmpxchg.h>
/*
* Atomic operations that C can't guarantee us. Useful for
* resource counting etc..
*/
#define ATOMIC_INIT(i) { (i) }
#define atomic_read(v) ACCESS_ONCE((v)->counter)
#define atomic_set(v, i) (((v)->counter) = i)
#include <linux/kernel.h>
static inline int atomic_add_return(int i, atomic_t *v)
{
h8300flags flags;
int ret;
flags = arch_local_irq_save();
ret = v->counter += i;
arch_local_irq_restore(flags);
return ret;
}
#define atomic_add(i, v) atomic_add_return(i, v)
#define atomic_add_negative(a, v) (atomic_add_return((a), (v)) < 0)
static inline int atomic_sub_return(int i, atomic_t *v)
{
h8300flags flags;
int ret;
flags = arch_local_irq_save();
ret = v->counter -= i;
arch_local_irq_restore(flags);
return ret;
}
#define atomic_sub(i, v) atomic_sub_return(i, v)
#define atomic_sub_and_test(i, v) (atomic_sub_return(i, v) == 0)
static inline int atomic_inc_return(atomic_t *v)
{
h8300flags flags;
int ret;
flags = arch_local_irq_save();
v->counter++;
ret = v->counter;
arch_local_irq_restore(flags);
return ret;
}
#define atomic_inc(v) atomic_inc_return(v)
/*
* atomic_inc_and_test - increment and test
* @v: pointer of type atomic_t
*
* Atomically increments @v by 1
* and returns true if the result is zero, or false for all
* other cases.
*/
#define atomic_inc_and_test(v) (atomic_inc_return(v) == 0)
static inline int atomic_dec_return(atomic_t *v)
{
h8300flags flags;
int ret;
flags = arch_local_irq_save();
--v->counter;
ret = v->counter;
arch_local_irq_restore(flags);
return ret;
}
#define atomic_dec(v) atomic_dec_return(v)
static inline int atomic_dec_and_test(atomic_t *v)
{
h8300flags flags;
int ret;
flags = arch_local_irq_save();
--v->counter;
ret = v->counter;
arch_local_irq_restore(flags);
return ret == 0;
}
static inline int atomic_cmpxchg(atomic_t *v, int old, int new)
{
int ret;
h8300flags flags;
flags = arch_local_irq_save();
ret = v->counter;
if (likely(ret == old))
v->counter = new;
arch_local_irq_restore(flags);
return ret;
}
static inline int __atomic_add_unless(atomic_t *v, int a, int u)
{
int ret;
h8300flags flags;
flags = arch_local_irq_save();
ret = v->counter;
if (ret != u)
v->counter += a;
arch_local_irq_restore(flags);
return ret;
}
static inline void atomic_clear_mask(unsigned long mask, unsigned long *v)
{
unsigned char ccr;
unsigned long tmp;
__asm__ __volatile__("stc ccr,%w3\n\t"
"orc #0x80,ccr\n\t"
"mov.l %0,%1\n\t"
"and.l %2,%1\n\t"
"mov.l %1,%0\n\t"
"ldc %w3,ccr"
: "=m"(*v), "=r"(tmp)
: "g"(~(mask)), "r"(ccr));
}
static inline void atomic_set_mask(unsigned long mask, unsigned long *v)
{
unsigned char ccr;
unsigned long tmp;
__asm__ __volatile__("stc ccr,%w3\n\t"
"orc #0x80,ccr\n\t"
"mov.l %0,%1\n\t"
"or.l %2,%1\n\t"
"mov.l %1,%0\n\t"
"ldc %w3,ccr"
: "=m"(*v), "=r"(tmp)
: "g"(~(mask)), "r"(ccr));
}
/* Atomic operations are already serializing */
#define smp_mb__before_atomic_dec() barrier()
#define smp_mb__after_atomic_dec() barrier()
#define smp_mb__before_atomic_inc() barrier()
#define smp_mb__after_atomic_inc() barrier()
#endif /* __ARCH_H8300_ATOMIC __ */
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