u-boot/arch/powerpc/include/asm/atomic.h
Masahiro Yamada 643aae1406 include: delete include/linux/config.h
Linux Kernel abolished include/linux/config.h long time ago.
(around version v2.6.18..v2.6.19)

We don't need to provide Linux copatibility any more.

This commit deletes include/linux/config.h
and fixes source files not to include this.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
2013-11-08 15:25:13 -05:00

93 lines
1.8 KiB
C

/*
* PowerPC atomic operations
*/
#ifndef _ASM_PPC_ATOMIC_H_
#define _ASM_PPC_ATOMIC_H_
#ifdef CONFIG_SMP
typedef struct { volatile int counter; } atomic_t;
#else
typedef struct { int counter; } atomic_t;
#endif
#define ATOMIC_INIT(i) { (i) }
#define atomic_read(v) ((v)->counter)
#define atomic_set(v,i) (((v)->counter) = (i))
extern void atomic_clear_mask(unsigned long mask, unsigned long *addr);
extern void atomic_set_mask(unsigned long mask, unsigned long *addr);
extern __inline__ int atomic_add_return(int a, atomic_t *v)
{
int t;
__asm__ __volatile__("\n\
1: lwarx %0,0,%3\n\
add %0,%2,%0\n\
stwcx. %0,0,%3\n\
bne- 1b"
: "=&r" (t), "=m" (*v)
: "r" (a), "r" (v), "m" (*v)
: "cc");
return t;
}
extern __inline__ int atomic_sub_return(int a, atomic_t *v)
{
int t;
__asm__ __volatile__("\n\
1: lwarx %0,0,%3\n\
subf %0,%2,%0\n\
stwcx. %0,0,%3\n\
bne- 1b"
: "=&r" (t), "=m" (*v)
: "r" (a), "r" (v), "m" (*v)
: "cc");
return t;
}
extern __inline__ int atomic_inc_return(atomic_t *v)
{
int t;
__asm__ __volatile__("\n\
1: lwarx %0,0,%2\n\
addic %0,%0,1\n\
stwcx. %0,0,%2\n\
bne- 1b"
: "=&r" (t), "=m" (*v)
: "r" (v), "m" (*v)
: "cc");
return t;
}
extern __inline__ int atomic_dec_return(atomic_t *v)
{
int t;
__asm__ __volatile__("\n\
1: lwarx %0,0,%2\n\
addic %0,%0,-1\n\
stwcx. %0,0,%2\n\
bne 1b"
: "=&r" (t), "=m" (*v)
: "r" (v), "m" (*v)
: "cc");
return t;
}
#define atomic_add(a, v) ((void) atomic_add_return((a), (v)))
#define atomic_sub(a, v) ((void) atomic_sub_return((a), (v)))
#define atomic_sub_and_test(a, v) (atomic_sub_return((a), (v)) == 0)
#define atomic_inc(v) ((void) atomic_inc_return((v)))
#define atomic_dec(v) ((void) atomic_dec_return((v)))
#define atomic_dec_and_test(v) (atomic_dec_return((v)) == 0)
#endif /* _ASM_PPC_ATOMIC_H_ */