[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / m68k / include / asm / atomic_no.h

#ifndef __ARCH_M68KNOMMU_ATOMIC__
#define __ARCH_M68KNOMMU_ATOMIC__

#include <linux/types.h>
#include <asm/system.h>

/*
 * Atomic operations that C can't guarantee us.  Useful for
 * resource counting etc..
 */

/*
 * We do not have SMP m68k systems, so we don't have to deal with that.
 */

#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_COLDFIRE
	__asm__ __volatile__("addl %1,%0" : "+m" (*v) : "d" (i));
#else
	__asm__ __volatile__("addl %1,%0" : "+m" (*v) : "di" (i));
#endif
}

static __inline__ void atomic_sub(int i, atomic_t *v)
{
#ifdef CONFIG_COLDFIRE
	__asm__ __volatile__("subl %1,%0" : "+m" (*v) : "d" (i));
#else
	__asm__ __volatile__("subl %1,%0" : "+m" (*v) : "di" (i));
#endif
}

static __inline__ int atomic_sub_and_test(int i, atomic_t * v)
{
	char c;
#ifdef CONFIG_COLDFIRE
	__asm__ __volatile__("subl %2,%1; seq %0"
			     : "=d" (c), "+m" (*v)
			     : "d" (i));
#else
	__asm__ __volatile__("subl %2,%1; seq %0"
			     : "=d" (c), "+m" (*v)
			     : "di" (i));
#endif
	return c != 0;
}

static __inline__ void atomic_inc(volatile atomic_t *v)
{
	__asm__ __volatile__("addql #1,%0" : "+m" (*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.
 */

static __inline__ int atomic_inc_and_test(volatile atomic_t *v)
{
	char c;
	__asm__ __volatile__("addql #1,%1; seq %0" : "=d" (c), "+m" (*v));
	return c != 0;
}

static __inline__ void atomic_dec(volatile atomic_t *v)
{
	__asm__ __volatile__("subql #1,%0" : "+m" (*v));
}

static __inline__ int atomic_dec_and_test(volatile atomic_t *v)
{
	char c;
	__asm__ __volatile__("subql #1,%1; seq %0" : "=d" (c), "+m" (*v));
	return c != 0;
}

static __inline__ void atomic_clear_mask(unsigned long mask, unsigned long *v)
{
	__asm__ __volatile__("andl %1,%0" : "+m" (*v) : "id" (~(mask)));
}

static __inline__ void atomic_set_mask(unsigned long mask, unsigned long *v)
{
	__asm__ __volatile__("orl %1,%0" : "+m" (*v) : "id" (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()

static inline int atomic_add_return(int i, atomic_t * v)
{
	unsigned long temp, flags;

	local_irq_save(flags);
	temp = *(long *)v;
	temp += i;
	*(long *)v = temp;
	local_irq_restore(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)
{
	unsigned long temp, flags;

	local_irq_save(flags);
	temp = *(long *)v;
	temp -= i;
	*(long *)v = temp;
	local_irq_restore(flags);

	return temp;
}

#define atomic_cmpxchg(v, o, n) ((int)cmpxchg(&((v)->counter), (o), (n)))
#define atomic_xchg(v, new) (xchg(&((v)->counter), new))

static __inline__ int atomic_add_unless(atomic_t *v, int a, int u)
{
	int c, old;
	c = atomic_read(v);
	for (;;) {
		if (unlikely(c == (u)))
			break;
		old = atomic_cmpxchg((v), c, c + (a));
		if (likely(old == c))
			break;
		c = old;
	}
	return c != (u);
}

#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)

#define atomic_dec_return(v) atomic_sub_return(1,(v))
#define atomic_inc_return(v) atomic_add_return(1,(v))

#include <asm-generic/atomic.h>
#endif /* __ARCH_M68KNOMMU_ATOMIC __ */
Commit	Line	Data
1da177e4 LT	1	#ifndef __ARCH_M68KNOMMU_ATOMIC__
	2	#define __ARCH_M68KNOMMU_ATOMIC__
	3
ea435467	4	#include <linux/types.h>
2856f5e3	5	#include <asm/system.h>
1da177e4 LT	6
	7	/*
	8	* Atomic operations that C can't guarantee us. Useful for
	9	* resource counting etc..
	10	*/
	11
	12	/*
	13	* We do not have SMP m68k systems, so we don't have to deal with that.
	14	*/
	15
1da177e4 LT	16	#define ATOMIC_INIT(i) { (i) }
	17
	18	#define atomic_read(v) ((v)->counter)
	19	#define atomic_set(v, i) (((v)->counter) = i)
	20
	21	static __inline__ void atomic_add(int i, atomic_t *v)
	22	{
	23	#ifdef CONFIG_COLDFIRE
	24	__asm__ __volatile__("addl %1,%0" : "+m" (*v) : "d" (i));
	25	#else
	26	__asm__ __volatile__("addl %1,%0" : "+m" (*v) : "di" (i));
	27	#endif
	28	}
	29
	30	static __inline__ void atomic_sub(int i, atomic_t *v)
	31	{
	32	#ifdef CONFIG_COLDFIRE
	33	__asm__ __volatile__("subl %1,%0" : "+m" (*v) : "d" (i));
	34	#else
	35	__asm__ __volatile__("subl %1,%0" : "+m" (*v) : "di" (i));
	36	#endif
	37	}
	38
	39	static __inline__ int atomic_sub_and_test(int i, atomic_t * v)
	40	{
	41	char c;
	42	#ifdef CONFIG_COLDFIRE
	43	__asm__ __volatile__("subl %2,%1; seq %0"
	44	: "=d" (c), "+m" (*v)
	45	: "d" (i));
	46	#else
	47	__asm__ __volatile__("subl %2,%1; seq %0"
	48	: "=d" (c), "+m" (*v)
	49	: "di" (i));
	50	#endif
	51	return c != 0;
	52	}
	53
	54	static __inline__ void atomic_inc(volatile atomic_t *v)
	55	{
	56	__asm__ __volatile__("addql #1,%0" : "+m" (*v));
	57	}
	58
	59	/*
	60	* atomic_inc_and_test - increment and test
	61	* @v: pointer of type atomic_t
	62	*
	63	* Atomically increments @v by 1
	64	* and returns true if the result is zero, or false for all
	65	* other cases.
	66	*/
	67
	68	static __inline__ int atomic_inc_and_test(volatile atomic_t *v)
	69	{
	70	char c;
	71	__asm__ __volatile__("addql #1,%1; seq %0" : "=d" (c), "+m" (*v));
	72	return c != 0;
	73	}
	74
	75	static __inline__ void atomic_dec(volatile atomic_t *v)
	76	{
	77	__asm__ __volatile__("subql #1,%0" : "+m" (*v));
	78	}
	79
80	static __inline__ int atomic_dec_and_test(volatile atomic_t *v)
81	{
82	char c;
83	__asm__ __volatile__("subql #1,%1; seq %0" : "=d" (c), "+m" (*v));
84	return c != 0;
85	}
86
87	static __inline__ void atomic_clear_mask(unsigned long mask, unsigned long *v)
88	{
89	__asm__ __volatile__("andl %1,%0" : "+m" (*v) : "id" (~(mask)));
90	}
91
92	static __inline__ void atomic_set_mask(unsigned long mask, unsigned long *v)
93	{
94	__asm__ __volatile__("orl %1,%0" : "+m" (*v) : "id" (mask));
95	}
96
97	/* Atomic operations are already serializing */
98	#define smp_mb__before_atomic_dec() barrier()
99	#define smp_mb__after_atomic_dec() barrier()
100	#define smp_mb__before_atomic_inc() barrier()
101	#define smp_mb__after_atomic_inc() barrier()
102
c514b8be	103	static inline int atomic_add_return(int i, atomic_t * v)
1da177e4 LT	104	{
	105	unsigned long temp, flags;
	106
	107	local_irq_save(flags);
	108	temp = (long )v;
	109	temp += i;
	110	(long )v = temp;
	111	local_irq_restore(flags);
	112
	113	return temp;
	114	}
	115
	116	#define atomic_add_negative(a, v) (atomic_add_return((a), (v)) < 0)
	117
c514b8be	118	static inline int atomic_sub_return(int i, atomic_t * v)
1da177e4 LT	119	{
	120	unsigned long temp, flags;
	121
	122	local_irq_save(flags);
	123	temp = (long )v;
	124	temp -= i;
	125	(long )v = temp;
	126	local_irq_restore(flags);
	127
	128	return temp;
	129	}
	130
4a6dae6d	131	#define atomic_cmpxchg(v, o, n) ((int)cmpxchg(&((v)->counter), (o), (n)))
ffbf670f	132	#define atomic_xchg(v, new) (xchg(&((v)->counter), new))
4a6dae6d	133
2856f5e3 MD	134	static __inline__ int atomic_add_unless(atomic_t *v, int a, int u)
	135	{
	136	int c, old;
	137	c = atomic_read(v);
	138	for (;;) {
	139	if (unlikely(c == (u)))
	140	break;
	141	old = atomic_cmpxchg((v), c, c + (a));
	142	if (likely(old == c))
	143	break;
	144	c = old;
	145	}
	146	return c != (u);
	147	}
	148
8426e1f6 NP	149	#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
8426e1f6 NP	150
1da177e4 LT	151	#define atomic_dec_return(v) atomic_sub_return(1,(v))
	152	#define atomic_inc_return(v) atomic_add_return(1,(v))
	153
d3cb4871	154	#include <asm-generic/atomic.h>
1da177e4	155	#endif /* __ARCH_M68KNOMMU_ATOMIC __ */