2012-03-28 11:30:02 -06:00
|
|
|
#ifndef _ASM_MICROBLAZE_CMPXCHG_H
|
|
|
|
#define _ASM_MICROBLAZE_CMPXCHG_H
|
|
|
|
|
2012-03-30 03:29:38 -06:00
|
|
|
#include <linux/irqflags.h>
|
|
|
|
|
2012-03-28 11:30:02 -06:00
|
|
|
void __bad_xchg(volatile void *ptr, int size);
|
|
|
|
|
|
|
|
static inline unsigned long __xchg(unsigned long x, volatile void *ptr,
|
|
|
|
int size)
|
|
|
|
{
|
|
|
|
unsigned long ret;
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
switch (size) {
|
|
|
|
case 1:
|
|
|
|
local_irq_save(flags);
|
|
|
|
ret = *(volatile unsigned char *)ptr;
|
|
|
|
*(volatile unsigned char *)ptr = x;
|
|
|
|
local_irq_restore(flags);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case 4:
|
|
|
|
local_irq_save(flags);
|
|
|
|
ret = *(volatile unsigned long *)ptr;
|
|
|
|
*(volatile unsigned long *)ptr = x;
|
|
|
|
local_irq_restore(flags);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
__bad_xchg(ptr, size), ret = 0;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
#define xchg(ptr, x) \
|
|
|
|
((__typeof__(*(ptr))) __xchg((unsigned long)(x), (ptr), sizeof(*(ptr))))
|
|
|
|
|
|
|
|
#include <asm-generic/cmpxchg.h>
|
|
|
|
#include <asm-generic/cmpxchg-local.h>
|
|
|
|
|
|
|
|
#endif /* _ASM_MICROBLAZE_CMPXCHG_H */
|