25 lines
510 B
C
25 lines
510 B
C
|
#ifndef __ASM_SH_CMPXCHG_CAS_H
|
||
|
|
#define __ASM_SH_CMPXCHG_CAS_H
|
||
|
|
|
||
|
|
static inline unsigned long
|
||
|
|
__cmpxchg_u32(volatile u32 *m, unsigned long old, unsigned long new)
|
||
|
|
{
|
||
|
|
__asm__ __volatile__("cas.l %1,%0,@r0"
|
||
|
|
: "+r"(new)
|
||
|
|
: "r"(old), "z"(m)
|
||
|
|
: "t", "memory" );
|
||
|
|
return new;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val)
|
||
|
|
{
|
||
|
|
unsigned long old;
|
||
|
|
do old = *m;
|
||
|
|
while (__cmpxchg_u32(m, old, val) != old);
|
||
|
|
return old;
|
||
|
|
}
|
||
|
|
|
||
|
|
#include <asm/cmpxchg-xchg.h>
|
||
|
|
|
||
|
|
#endif /* __ASM_SH_CMPXCHG_CAS_H */
|