aboutsummaryrefslogtreecommitdiff
path: root/arch/blackfin/include/asm/atomic.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/blackfin/include/asm/atomic.h')
-rw-r--r--arch/blackfin/include/asm/atomic.h155
1 files changed, 112 insertions, 43 deletions
diff --git a/arch/blackfin/include/asm/atomic.h b/arch/blackfin/include/asm/atomic.h
index 7cf50871860..94b2a9b1945 100644
--- a/arch/blackfin/include/asm/atomic.h
+++ b/arch/blackfin/include/asm/atomic.h
@@ -1,6 +1,7 @@
#ifndef __ARCH_BLACKFIN_ATOMIC__
#define __ARCH_BLACKFIN_ATOMIC__
+#include <linux/types.h>
#include <asm/system.h> /* local_irq_XXX() */
/*
@@ -13,108 +14,160 @@
* Tony Kou (tonyko@lineo.ca) Lineo Inc. 2001
*/
-typedef struct {
- int counter;
-} atomic_t;
#define ATOMIC_INIT(i) { (i) }
-
-#define atomic_read(v) ((v)->counter)
#define atomic_set(v, i) (((v)->counter) = i)
-static __inline__ void atomic_add(int i, atomic_t * v)
+#ifdef CONFIG_SMP
+
+#define atomic_read(v) __raw_uncached_fetch_asm(&(v)->counter)
+
+asmlinkage int __raw_uncached_fetch_asm(const volatile int *ptr);
+
+asmlinkage int __raw_atomic_update_asm(volatile int *ptr, int value);
+
+asmlinkage int __raw_atomic_clear_asm(volatile int *ptr, int value);
+
+asmlinkage int __raw_atomic_set_asm(volatile int *ptr, int value);
+
+asmlinkage int __raw_atomic_xor_asm(volatile int *ptr, int value);
+
+asmlinkage int __raw_atomic_test_asm(const volatile int *ptr, int value);
+
+static inline void atomic_add(int i, atomic_t *v)
+{
+ __raw_atomic_update_asm(&v->counter, i);
+}
+
+static inline void atomic_sub(int i, atomic_t *v)
+{
+ __raw_atomic_update_asm(&v->counter, -i);
+}
+
+static inline int atomic_add_return(int i, atomic_t *v)
+{
+ return __raw_atomic_update_asm(&v->counter, i);
+}
+
+static inline int atomic_sub_return(int i, atomic_t *v)
+{
+ return __raw_atomic_update_asm(&v->counter, -i);
+}
+
+static inline void atomic_inc(volatile atomic_t *v)
+{
+ __raw_atomic_update_asm(&v->counter, 1);
+}
+
+static inline void atomic_dec(volatile atomic_t *v)
+{
+ __raw_atomic_update_asm(&v->counter, -1);
+}
+
+static inline void atomic_clear_mask(int mask, atomic_t *v)
+{
+ __raw_atomic_clear_asm(&v->counter, mask);
+}
+
+static inline void atomic_set_mask(int mask, atomic_t *v)
+{
+ __raw_atomic_set_asm(&v->counter, mask);
+}
+
+static inline int atomic_test_mask(int mask, atomic_t *v)
+{
+ return __raw_atomic_test_asm(&v->counter, mask);
+}
+
+/* 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()
+
+#else /* !CONFIG_SMP */
+
+#define atomic_read(v) ((v)->counter)
+
+static inline void atomic_add(int i, atomic_t *v)
{
long flags;
- local_irq_save(flags);
+ local_irq_save_hw(flags);
v->counter += i;
- local_irq_restore(flags);
+ local_irq_restore_hw(flags);
}
-static __inline__ void atomic_sub(int i, atomic_t * v)
+static inline void atomic_sub(int i, atomic_t *v)
{
long flags;
- local_irq_save(flags);
+ local_irq_save_hw(flags);
v->counter -= i;
- local_irq_restore(flags);
+ local_irq_restore_hw(flags);
}
-static inline int atomic_add_return(int i, atomic_t * v)
+static inline int atomic_add_return(int i, atomic_t *v)
{
int __temp = 0;
long flags;
- local_irq_save(flags);
+ local_irq_save_hw(flags);
v->counter += i;
__temp = v->counter;
- local_irq_restore(flags);
+ local_irq_restore_hw(flags);
return __temp;
}
-#define atomic_add_negative(a, v) (atomic_add_return((a), (v)) < 0)
-static inline int atomic_sub_return(int i, atomic_t * v)
+static inline int atomic_sub_return(int i, atomic_t *v)
{
int __temp = 0;
long flags;
- local_irq_save(flags);
+ local_irq_save_hw(flags);
v->counter -= i;
__temp = v->counter;
- local_irq_restore(flags);
+ local_irq_restore_hw(flags);
return __temp;
}
-static __inline__ void atomic_inc(volatile atomic_t * v)
+static inline void atomic_inc(volatile atomic_t *v)
{
long flags;
- local_irq_save(flags);
+ local_irq_save_hw(flags);
v->counter++;
- local_irq_restore(flags);
+ local_irq_restore_hw(flags);
}
-#define atomic_cmpxchg(v, o, n) ((int)cmpxchg(&((v)->counter), (o), (n)))
-#define atomic_xchg(v, new) (xchg(&((v)->counter), new))
-
-#define atomic_add_unless(v, a, u) \
-({ \
- int c, old; \
- c = atomic_read(v); \
- while (c != (u) && (old = atomic_cmpxchg((v), c, c + (a))) != c) \
- c = old; \
- c != (u); \
-})
-#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
-
-static __inline__ void atomic_dec(volatile atomic_t * v)
+static inline void atomic_dec(volatile atomic_t *v)
{
long flags;
- local_irq_save(flags);
+ local_irq_save_hw(flags);
v->counter--;
- local_irq_restore(flags);
+ local_irq_restore_hw(flags);
}
-static __inline__ void atomic_clear_mask(unsigned int mask, atomic_t * v)
+static inline void atomic_clear_mask(unsigned int mask, atomic_t *v)
{
long flags;
- local_irq_save(flags);
+ local_irq_save_hw(flags);
v->counter &= ~mask;
- local_irq_restore(flags);
+ local_irq_restore_hw(flags);
}
-static __inline__ void atomic_set_mask(unsigned int mask, atomic_t * v)
+static inline void atomic_set_mask(unsigned int mask, atomic_t *v)
{
long flags;
- local_irq_save(flags);
+ local_irq_save_hw(flags);
v->counter |= mask;
- local_irq_restore(flags);
+ local_irq_restore_hw(flags);
}
/* Atomic operations are already serializing */
@@ -123,9 +176,25 @@ static __inline__ void atomic_set_mask(unsigned int mask, atomic_t * v)
#define smp_mb__before_atomic_inc() barrier()
#define smp_mb__after_atomic_inc() barrier()
+#endif /* !CONFIG_SMP */
+
+#define atomic_add_negative(a, v) (atomic_add_return((a), (v)) < 0)
#define atomic_dec_return(v) atomic_sub_return(1,(v))
#define atomic_inc_return(v) atomic_add_return(1,(v))
+#define atomic_cmpxchg(v, o, n) ((int)cmpxchg(&((v)->counter), (o), (n)))
+#define atomic_xchg(v, new) (xchg(&((v)->counter), new))
+
+#define atomic_add_unless(v, a, u) \
+({ \
+ int c, old; \
+ c = atomic_read(v); \
+ while (c != (u) && (old = atomic_cmpxchg((v), c, c + (a))) != c) \
+ c = old; \
+ c != (u); \
+})
+#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
+
/*
* atomic_inc_and_test - increment and test
* @v: pointer of type atomic_t